CN109347312B - Integrated power supply filter circuit - Google Patents
Integrated power supply filter circuit Download PDFInfo
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- CN109347312B CN109347312B CN201811450002.5A CN201811450002A CN109347312B CN 109347312 B CN109347312 B CN 109347312B CN 201811450002 A CN201811450002 A CN 201811450002A CN 109347312 B CN109347312 B CN 109347312B
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- 238000001914 filtration Methods 0.000 description 7
- 230000003321 amplification Effects 0.000 description 6
- 238000003199 nucleic acid amplification method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
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- 101000946167 Homo sapiens Transcription factor LBX1 Proteins 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from DC input or output
- H02M1/15—Arrangements for reducing ripples from DC input or output using active elements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
- H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
- H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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Abstract
The invention relates to an integrable power supply filter circuit, which comprises a rectifier circuit, an N-level pulsating direct current charge shifting and voltage merging rectifier circuit and an N-level electronic filter circuit which are electrically connected in sequence according to the current flow direction, wherein the rectifier circuit is composed of a bridge rectifier DW1, the N-level pulsating direct current charge shifting and voltage merging rectifier circuit comprises at least an N-level pulsating direct current charge shifting unit circuit and at least an N+1-level voltage merging rectifier unit circuit, each level pulsating direct current charge shifting unit circuit is composed of a resistor, a capacitor and a transistor, and each level voltage merging rectifier unit circuit is composed of a diode and a transistor; the N-level electronic filter circuit comprises at least one unit electronic filter circuit, wherein each unit electronic filter circuit consists of two triodes, seven resistors, a capacitor and an operational amplifier.
Description
Technical Field
The invention belongs to the technical field of power supply of electronic products, and particularly relates to an integrable power supply filter circuit for a stroboscopic-free LED lamp.
Background
In electronic products, a power supply is necessary, and an existing power supply circuit rectifies alternating current to obtain pulsating direct current, and then filters the pulsating direct current through a filter circuit to obtain smooth direct current for use in an electric device. However, in different use occasions, the requirements on direct current are different, wherein the requirements on direct current of the stroboscopic-free LED lamp are very high, so that the power supply filtering of the stroboscopic-free LED lamp adopts a filter circuit composed of components such as an inductor, an electrolytic capacitor and the like.
The filter circuit composed of components such as an inductor, an electrolytic capacitor and the like has high cost and large volume, and the service life of the filter circuit is limited due to the influence of the electrolytic capacitor. In addition, because the electrolytic capacitor and other components have large volumes and cannot be used in some small-volume lamps and glass product lamps, development of a power supply filter circuit which can be applied to all small-volume lamps and glass product lamps and can be integrated without stroboscopic effect is needed.
Disclosure of Invention
The invention overcomes the defects existing in the prior art, and solves the technical problems that: the power supply filter circuit which is small in size, low in cost and long in service life and is suitable for (made into) an integrated LED lamp without stroboscopic effect is provided.
In order to solve the technical problems, the invention adopts the following technical scheme: the power supply filter circuit comprises a rectifier circuit, an N-level pulsating direct current charge shifting and voltage combining rectifier circuit and an N-level electronic filter circuit which are electrically connected in sequence according to the current flow direction, wherein the rectifier circuit is composed of a bridge rectifier DW1, the N-level pulsating direct current charge shifting and voltage combining rectifier circuit comprises at least an N-level pulsating direct current charge shifting unit circuit and an N+1-level voltage combining rectifier unit circuit, each level pulsating direct current charge shifting unit circuit is composed of a resistor, a capacitor and a transistor, and each level voltage combining rectifier unit circuit is composed of a diode and a transistor; the N-stage electronic filter circuit comprises at least one unit electronic filter circuit, wherein each unit electronic filter circuit consists of two triodes, seven resistors, a capacitor and an operational amplifier (N is a positive integer).
The N-level pulsating direct current charge shifting and voltage merging rectifying circuit comprises nine-level pulsating direct current charge shifting unit circuits and ten-level voltage merging rectifying unit circuits, and the specific circuits comprise resistors R2, R4, R6, R8, R10, R12, R14, R16 and R18, transistors Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, Q11, Q12, Q13, Q14, Q15, Q16, Q17, Q18 and Q19, capacitors CJ1, CJ2, CJ3, CJ4, CJ5, CJ6, CJ7, CJ8 and CJ9, and diodes D1, D2, D3, D4, D5, D6, D7, D8, D9, D10; the N-level electronic filter circuit comprises a unit electronic filter circuit, and specifically comprises resistors R19, R20, R21, R22, R23, R24 and R25, triodes Q29 and Q30, an operational amplifier U1A and a capacitor CJ10; The positive electrode of the input end of the bridge rectifier DW1 is connected with the L end of 220V/50Hz alternating current, the negative electrode of the input end is connected with the N end of 220V/50Hz alternating current, the negative electrode of the output end is grounded, the positive electrode of the output end is respectively connected with one end of a resistor R2, the source electrode of a transistor Q2 and the anode of a diode D1, the other end of the resistor R2 is respectively connected with the grid electrode of the transistor Q2 and one end of a capacitor CJ1, the drain electrode of the transistor Q2 is connected with the other end of the capacitor CJ1, the anode of the diode D2, one end of a resistor R4 and the source electrode of the transistor Q4, and the cathode of the diode D1 is respectively connected with the source electrode and the grid electrode of the transistor Q1; The cathode of the diode D2 is respectively connected with the source electrode and the grid electrode of the transistor Q3; the other end of the resistor R4 is respectively connected with the grid electrode of the transistor Q4 and one end of the capacitor CJ2, the drain electrode of the transistor Q4 is connected with the other end of the capacitor CJ2, the anode of the diode D3, one end of the resistor R6 and the source electrode of the transistor Q6, and the cathode of the diode D3 is respectively connected with the source electrode and the grid electrode of the transistor Q5; the other end of the resistor R6 is respectively connected with the grid electrode of the transistor Q6 and one end of the capacitor CJ3, the drain electrode of the transistor Q6 is connected with the other end of the capacitor CJ3, the anode of the diode D4, one end of the resistor R8 and the source electrode of the transistor Q8, and the cathode of the diode D4 is respectively connected with the source electrode and the grid electrode of the transistor Q7; the other end of the resistor R8 is respectively connected with the grid electrode of the transistor Q8 and one end of the capacitor CJ4, the drain electrode of the transistor Q8 is connected with the other end of the capacitor CJ4, the anode of the diode D5, one end of the resistor R10 and the source electrode of the transistor Q10, and the cathode of the diode D5 is respectively connected with the source electrode and the grid electrode of the transistor Q9; the other end of the resistor R10 is respectively connected with the grid electrode of the transistor Q10 and one end of the capacitor CJ5, the drain electrode of the transistor Q10 is connected with the other end of the capacitor CJ5, the anode of the diode D6, one end of the resistor R12 and the source electrode of the transistor Q12, and the cathode of the diode D6 is respectively connected with the source electrode and the grid electrode of the transistor Q11; The other end of the resistor R12 is respectively connected with the grid electrode of the transistor Q12 and one end of the capacitor CJ6, the drain electrode of the transistor Q12 is connected with the other end of the capacitor CJ6, the anode of the diode D7, one end of the resistor R14 and the source electrode of the transistor Q14, and the cathode of the diode D7 is respectively connected with the source electrode and the grid electrode of the transistor Q13; the other end of the resistor R14 is respectively connected with the grid electrode of the transistor Q14 and one end of the capacitor CJ7, the drain electrode of the transistor Q14 is connected with the other end of the capacitor CJ7, the anode of the diode D8, one end of the resistor R16 and the source electrode of the transistor Q16, and the cathode of the diode D8 is respectively connected with the source electrode and the grid electrode of the transistor Q15; The other end of the resistor R16 is respectively connected with the grid electrode of the transistor Q16 and one end of the capacitor CJ8, the drain electrode of the transistor Q16 is connected with the other end of the capacitor CJ8, the anode of the diode D9, one end of the resistor R18 and the source electrode of the transistor Q18, and the cathode of the diode D9 is respectively connected with the source electrode and the grid electrode of the transistor Q17; the other end of the resistor R18 is respectively connected with the grid electrode of the transistor Q18 and one end of the capacitor CJ9, the drain electrode of the transistor Q18 is connected with the other end of the capacitor CJ9 and the anode of the diode D10, and the cathode of the diode D10 is respectively connected with the source electrode and the grid electrode of the transistor Q19; The drain electrode of the transistor Q1, the drain electrode of the transistor Q3, the drain electrode of the transistor Q5, the drain electrode of the transistor Q7, the drain electrode of the transistor Q9, the drain electrode of the transistor Q11, the drain electrode of the transistor Q13, the drain electrode of the transistor Q15, the drain electrode of the transistor Q17 and the drain electrode of the transistor Q19 are connected with one end of a resistor R20, the collector electrode of a triode Q29 and the collector electrode of a triode Q30, the other end of the resistor R20 is connected with the base electrode of the triode Q29, one end of a resistor R21, one end of a resistor R25 and one end of a resistor R23, the emitter electrode of the triode Q29 is connected with the base electrode of the triode Q30 and the other end of the resistor R21 and one end of the resistor R19, The other end of the resistor R19 is connected with the emitter of the triode Q30 to form an output end anode vled+; The other end of the resistor R24 is connected with the No. 3 pin of the operational amplifier U1A and one end of the capacitor CJ10, the other end of the capacitor CJ10 is connected with the No. 4 pin of the operational amplifier U1A and the other end of the resistor R23, and then the other end of the resistor R24 is grounded to form an output end cathode, the No. 2 pin of the operational amplifier U1A is connected with one end of the resistor R22, the other end of the resistor R22 is connected with the other end of the resistor R25 and the No.1 pin of the operational amplifier U1A, and the No. 8 pin of the operational amplifier is externally connected with a linear power supply VDD.
The transistors Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, Q11, Q12, Q13, Q14, Q15, Q16, Q17, Q18, Q19 are N-channel MOS transistors.
The N-level electronic filter circuit is formed by connecting two unit electronic filter circuits in series.
The N-level electronic filter circuit is formed by connecting two unit electronic filter circuits in parallel.
The N-level electronic filter circuit is formed by mixing four unit electronic filter circuits in series.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
1. The technology provided by the invention adopts semiconductor materials, so that the integration is convenient;
2. The CJ capacitor in the N-stage pulsating direct current electric charge shifting circuit can be formed between the grid electrode and the drain electrode of the MOS tube during the MOS tube manufacturing process to form an integrated N-stage pulsating direct current electric charge shifting circuit, so as to obtain a voltage waveform required by pulsating direct current electric charge shifting;
3. The CJ capacitor in the electronic filter circuit uses an integrated dielectric capacitor, amplifies the capacity of the CJ capacitor by N times through an operational amplifier, and can be used as a filter capacitor of the electronic filter to effectively filter noise components of the N-level pulsating direct current charge shift and voltage combination rectifying circuit, so that excellent direct current is obtained;
4. The integrated circuit can be manufactured, has small volume, good consistency, long service life, convenient application, reduced production procedures and suitability for large-scale production;
To sum up: the technology provided by the invention adopts semiconductor materials, avoids the defects of using large-volume components such as inductance, electrolytic capacitor and the like in the existing power supply filter circuit, can be manufactured into an integrated circuit, has small volume, good consistency, long service life and convenient application, and can improve the production capacity of products; meanwhile, when the load current is insufficient, a plurality of groups of the current-limiting devices can be used in parallel.
Drawings
The invention is described in further detail below with reference to the accompanying drawings;
FIG. 1 is a schematic block diagram of a circuit of the present invention;
FIG. 2 is a schematic diagram of a circuit structure according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram of a nine-stage pulsating DC charge shifting and voltage combining rectifying circuit according to the present invention;
FIG. 4 is a schematic diagram of a unit electronic filter circuit according to the present invention;
FIG. 5 is a schematic block diagram of a circuit according to a second embodiment of the present invention;
FIG. 6 is a schematic block diagram of a third embodiment of the present invention;
FIG. 7 is a schematic block diagram of a fourth embodiment of the present invention;
FIG. 8 is a schematic diagram of a series arrangement of two unit electronic filter circuits according to the present invention;
FIG. 9 is a schematic diagram of a parallel structure of two unit electronic filter circuits according to the present invention;
FIG. 10 is a schematic diagram of a serial-parallel hybrid architecture of four unit electronic filter circuits according to the present invention;
FIG. 11 is a schematic diagram of LBX1 waveform obtained by rectifying 220V/50Hz alternating current with a rectifying circuit to obtain pulsating direct current and combining the first-stage voltage with the rectifying unit circuit;
FIG. 12 is a schematic diagram of LBX2 waveform obtained by delaying the pulsating direct current obtained by rectifying 220V/50Hz alternating current by a first-stage pulsating direct current charge shifting unit circuit;
FIG. 13 is a schematic diagram of LBX10 waveform obtained by delaying the pulsating direct current obtained by rectifying 220V/50Hz alternating current by a ninth stage pulsating direct current charge shifting unit circuit;
Fig. 14 is a schematic diagram of waveforms obtained by sequentially passing a nine-stage pulsating direct current charge shifting unit circuit and a ten-stage voltage combining rectifying unit circuit through a one-stage unit electronic filtering circuit after a 220V/50Hz alternating current is rectified by a rectifying circuit in the invention, wherein: the LBX11 waveform is obtained by carrying out charge shift and voltage combination rectification on the pulsating direct current, and the LBX12 waveform is obtained by carrying out filtering on the LBX11 waveform by a primary unit electronic filter circuit.
FIG. 15 is a first stage of a pulsating DC charge shifting unit circuit according to the present invention;
fig. 16 is a schematic diagram of a first stage voltage combining rectifying unit circuit according to the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention; all other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, the power supply filter circuit capable of integrating provided by the invention comprises a rectifying circuit, an N-level pulsating direct current charge shifting and voltage combining rectifying circuit and an N-level electronic filtering circuit which are electrically connected in sequence according to current flow direction, wherein the rectifying circuit is composed of a bridge rectifier DW1, and the N-level pulsating direct current charge shifting and voltage combining rectifying circuit comprises at least an N-level pulsating direct current charge shifting unit circuit and an n+1-level voltage combining rectifying unit circuit, wherein each level pulsating direct current charge shifting unit circuit is composed of a resistor, a capacitor and a transistor, and each level voltage combining rectifying unit circuit is composed of a diode and a transistor; the N-stage electronic filter circuit comprises at least one unit electronic filter circuit, wherein each unit electronic filter circuit consists of two triodes, seven resistors, a capacitor and an operational amplifier (N is a positive integer).
As shown in fig. 2-4, the N-stage pulsating direct current charge shifting and voltage combining rectification circuit comprises nine-stage pulsating direct current charge shifting unit circuits and ten-stage voltage combining rectification unit circuits, wherein the specific circuits comprise resistors R2, R4, R6, R8, R10, R12, R14, R16 and R18, transistors Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, Q11, Q12, Q13, Q14, Q15, Q16, Q17, Q18 and Q19, capacitors CJ1, CJ2, CJ3, CJ4, CJ5, CJ6, CJ7, CJ8, CJ9, diodes D1, D2, D3, D4, D5, D6, D7, D8, D9, D10; the N-level electronic filter circuit comprises a unit electronic filter circuit, and specifically comprises resistors R19, R20, R21, R22, R23, R24 and R25, triodes Q29 and Q30, an operational amplifier U1A and a capacitor CJ10; The positive electrode of the input end of the bridge rectifier DW1 is connected with the L end of 220V/50Hz alternating current, the negative electrode of the input end is connected with the N end of 220V/50Hz alternating current, the negative electrode of the output end is grounded, the positive electrode of the output end is respectively connected with one end of a resistor R2, the source electrode of a transistor Q2 and the anode of a diode D1, the other end of the resistor R2 is respectively connected with the grid electrode of the transistor Q2 and one end of a capacitor CJ1, the drain electrode of the transistor Q2 is connected with the other end of the capacitor CJ1, the anode of the diode D2, one end of a resistor R4 and the source electrode of the transistor Q4, and the cathode of the diode D1 is respectively connected with the source electrode and the grid electrode of the transistor Q1; The cathode of the diode D2 is respectively connected with the source electrode and the grid electrode of the transistor Q3; the other end of the resistor R4 is respectively connected with the grid electrode of the transistor Q4 and one end of the capacitor CJ2, the drain electrode of the transistor Q4 is connected with the other end of the capacitor CJ2, the anode of the diode D3, one end of the resistor R6 and the source electrode of the transistor Q6, and the cathode of the diode D3 is respectively connected with the source electrode and the grid electrode of the transistor Q5; the other end of the resistor R6 is respectively connected with the grid electrode of the transistor Q6 and one end of the capacitor CJ3, the drain electrode of the transistor Q6 is connected with the other end of the capacitor CJ3, the anode of the diode D4, one end of the resistor R8 and the source electrode of the transistor Q8, and the cathode of the diode D4 is respectively connected with the source electrode and the grid electrode of the transistor Q7; the other end of the resistor R8 is respectively connected with the grid electrode of the transistor Q8 and one end of the capacitor CJ4, the drain electrode of the transistor Q8 is connected with the other end of the capacitor CJ4, the anode of the diode D5, one end of the resistor R10 and the source electrode of the transistor Q10, and the cathode of the diode D5 is respectively connected with the source electrode and the grid electrode of the transistor Q9; the other end of the resistor R10 is respectively connected with the grid electrode of the transistor Q10 and one end of the capacitor CJ5, the drain electrode of the transistor Q10 is connected with the other end of the capacitor CJ5, the anode of the diode D6, one end of the resistor R12 and the source electrode of the transistor Q12, and the cathode of the diode D6 is respectively connected with the source electrode and the grid electrode of the transistor Q11; The other end of the resistor R12 is respectively connected with the grid electrode of the transistor Q12 and one end of the capacitor CJ6, the drain electrode of the transistor Q12 is connected with the other end of the capacitor CJ6, the anode of the diode D7, one end of the resistor R14 and the source electrode of the transistor Q14, and the cathode of the diode D7 is respectively connected with the source electrode and the grid electrode of the transistor Q13; the other end of the resistor R14 is respectively connected with the grid electrode of the transistor Q14 and one end of the capacitor CJ7, the drain electrode of the transistor Q14 is connected with the other end of the capacitor CJ7, the anode of the diode D8, one end of the resistor R16 and the source electrode of the transistor Q16, and the cathode of the diode D8 is respectively connected with the source electrode and the grid electrode of the transistor Q15; The other end of the resistor R16 is respectively connected with the grid electrode of the transistor Q16 and one end of the capacitor CJ8, the drain electrode of the transistor Q16 is connected with the other end of the capacitor CJ8, the anode of the diode D9, one end of the resistor R18 and the source electrode of the transistor Q18, and the cathode of the diode D9 is respectively connected with the source electrode and the grid electrode of the transistor Q17; the other end of the resistor R18 is respectively connected with the grid electrode of the transistor Q18 and one end of the capacitor CJ9, the drain electrode of the transistor Q18 is connected with the other end of the capacitor CJ9 and the anode of the diode D10, and the cathode of the diode D10 is respectively connected with the source electrode and the grid electrode of the transistor Q19; The drain electrode of the transistor Q1, the drain electrode of the transistor Q3, the drain electrode of the transistor Q5, the drain electrode of the transistor Q7, the drain electrode of the transistor Q9, the drain electrode of the transistor Q11, the drain electrode of the transistor Q13, the drain electrode of the transistor Q15, the drain electrode of the transistor Q17 and the drain electrode of the transistor Q19 are connected with one end of a resistor R20, the collector electrode of a triode Q29 and the collector electrode of a triode Q30, the other end of the resistor R20 is connected with the base electrode of the triode Q29, one end of a resistor R21, one end of a resistor R25 and one end of a resistor R23, the emitter electrode of the triode Q29 is connected with the base electrode of the triode Q30 and the other end of the resistor R21 and one end of the resistor R19, The other end of the resistor R19 is connected with the emitter of the triode Q30 to form an output end anode vled+; The other end of the resistor R24 is connected with the No. 3 pin of the operational amplifier U1A and one end of the capacitor CJ10, the other end of the capacitor CJ10 is connected with the No. 4 pin of the operational amplifier U1A and the other end of the resistor R23, and then the other end of the resistor R24 is grounded to form an output end cathode, the No. 2 pin of the operational amplifier U1A is connected with one end of the resistor R22, the other end of the resistor R22 is connected with the other end of the resistor R25 and the No.1 pin of the operational amplifier U1A, and the No. 8 pin of the operational amplifier is externally connected with a linear power supply VDD.
The transistors Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, Q11, Q12, Q13, Q14, Q15, Q16, Q17, Q18, Q19 are N-channel MOS transistors.
As shown in fig. 5, the N-stage electronic filter circuit is composed of two unit electronic filter circuits connected in series.
As shown in fig. 6, the N-stage electronic filter circuit is formed by connecting two unit electronic filter circuits in parallel.
As shown in fig. 7, the N-stage electronic filter circuit is formed by serial-parallel mixing of four unit electronic filter circuits.
As shown in fig. 2, 11, 12 and 13, in the present invention, a diode D1 and a transistor Q1 form a first-stage voltage combining rectifying unit circuit, and a resistor R2, a transistor Q2 and a capacitor CJ1 form a first-stage pulsating direct current charge shifting unit circuit; 220V/50Hz alternating current is rectified by a bridge rectifier DW1 to obtain 100Hz pulsating direct current Vin (with a waveform of LBX 1), the pulsating direct current Vin is directly applied to the source electrode of an N-channel MOS transistor Q2, meanwhile, electric energy is applied to the grid electrode of the transistor Q2 through a resistor R2, electric charge is stored in a short time through a capacitor CJ1 connected between the grid electrode and the drain electrode of the transistor Q2, when the grid electrode voltage of the transistor Q2 rises to a certain value, the transistor Q2 is conducted, a first voltage signal of the 100Hz pulsating direct current Vin is transmitted to the drain electrode (with the waveform of LBX 2) at the output end of the transistor Q2 in a delay way due to the existence of the resistor R2 and the capacitor CJ1, the length of the delay time is determined by the parameters of the resistor R2 and the capacitor CJ 1; The diode D2 and the transistor Q3 form a second-stage voltage merging and rectifying unit circuit, and the resistor R4, the transistor Q4 and the capacitor CJ2 form a second-stage pulsating direct current charge shifting unit circuit; the diode D3 and the transistor Q5 form a third-stage voltage merging and rectifying unit circuit, and the resistor R6, the transistor Q6 and the capacitor CJ3 form a third-stage pulsating direct current charge shifting unit circuit; the diode D4 and the transistor Q7 form a fourth-stage voltage merging and rectifying unit circuit, and the resistor R8, the transistor Q8 and the capacitor CJ4 form a fourth-stage pulsating direct current charge shifting unit circuit; the diode D5 and the transistor Q9 form a fifth-stage voltage merging and rectifying unit circuit, and the resistor R10, the transistor Q10 and the capacitor CJ5 form a fifth-stage pulsating direct current charge shifting unit circuit; The diode D6 and the transistor Q11 form a sixth-stage voltage merging and rectifying unit circuit, and the resistor R12, the transistor Q12 and the capacitor CJ6 form a sixth-stage pulsating direct current charge shifting unit circuit; the diode D7 and the transistor Q13 form a seventh-stage voltage merging and rectifying unit circuit, and the resistor R14, the transistor Q14 and the capacitor CJ7 form a seventh-stage pulsating direct current charge shifting unit circuit; the diode D8 and the transistor Q15 form an eighth-stage voltage merging and rectifying unit circuit, and the resistor R16, the transistor Q16 and the capacitor CJ8 form an eighth-stage pulsating direct current charge shifting unit circuit; the diode D9 and the transistor Q17 form a ninth-stage voltage merging and rectifying unit circuit, the resistor R18, the transistor Q18 and the capacitor CJ9 form a ninth-stage pulsating direct current electric charge shifting unit circuit, and the pulsating direct current is transmitted to a drain electrode (the waveform is LBX 10) of an output end of the transistor Q18 after delayed shifting through the ninth-stage pulsating direct current electric charge shifting unit circuit; The diode D10 and the transistor Q19 form a tenth-stage voltage merging and rectifying unit circuit; the working principle of each stage of pulsating direct current charge shifting unit circuit is the same, and the working principle of each stage of voltage merging and rectifying unit circuit is also the same; when the pulsating direct current sequentially passes through a follow-up pulsating direct current charge shifting unit circuit and a voltage merging rectifying unit circuit, a voltage output Vout which is obtained after shifting, superposition and rectification is obtained, part of clutter components exist in the voltage output Vout, the voltage output Vout is filtered through a unit electronic filter circuit, a Darlington amplifying circuit is formed by triodes Q29, Q30, resistors R19, R20 and R21 in the unit electronic filter circuit, the voltage output Vout is equivalent to a triode, and the amplification factor of the triode is the product of the amplification factors of the triodes Q29 and Q30; the operational amplifier U1A, the resistors R22, R23, R24, R25 and the capacitor CJ10 form an analog capacitor; the positive input end of the operational amplifier U1A is connected with an integratable medium capacitor CJ10, and as the operational amplifier U1A and the resistors R22, R23, R24 and R25 form an operational amplifier circuit with large amplification gain, the capacitance of the medium capacitor is amplified to thousands or even tens of thousands times, which is equivalent to realizing an analog large capacitor, so that the base electrode of the triode equivalent to the Darlington amplifying circuit is equivalently connected with an analog large capacitor.
As shown in fig. 14, when a voltage Vout (waveform LBX 11) is input into the unit electronic filter circuit, the base of the triode Q29 is powered through the resistor R20, and since the base of the triode Q29 is connected with a capacitor, the resistor R20 charges the capacitor first, and when the potential reaches the on voltage of the triode Q29, the darlington amplifying circuit has a voltage vled+ output; if the voltage Vout input into the electronic filter circuit fluctuates or noise occurs, the electric energy stored in the capacitor is released again to maintain the operation of the Darlington amplifying circuit, so that the effect of smoothing current is further realized; in summary, the pulsating direct current sequentially passes through the several stages of pulsating direct current charge shifting unit circuits and the voltage combining rectifying unit circuits to obtain shifted, superimposed and rectified voltage output Vout, the voltage output Vout is input from collectors of the triodes Q29 and Q30 in the electronic filter circuit, bases of the voltage output Vout are connected with an equivalent analog large capacitor formed by components such as the operational amplifier U1A, and the like, and the output vled+ (waveform LBX 12) is output from emitters of the triodes Q29 and Q30 after filtering, and is provided for the LED or the LED driving circuit; in the above-described unit electronic filter circuit, the operational amplifier U1A is supplied with power from the VDD linear power supply.
As shown in fig. 8, further, in the unit electronic filter circuit, since the amplification factors of the darlington amplifying circuits are different, the amplification gains of the operational amplifier circuits are different, so that the amplification effects of the analog capacitors are different, when the one-stage unit electronic filter circuit cannot meet the filtering requirement, a plurality of unit electronic filter circuits can be considered to be used in series until the filtering effect meets the smoothness requirement, specifically, the output end of the single unit electronic filter circuit is connected with the input end of the next unit electronic filter circuit in series, and the input end of the first unit electronic filter circuit is taken as the input end, and the output end of the last unit electronic filter circuit is taken as the output end.
Further, as shown in fig. 9, since the analog capacitor of the single unit electronic filter circuit is integrated, the capacitance of the analog capacitor cannot be infinitely large, and the current has a relation with the capacitance in the unit electronic filter circuit, when the capacitance is insufficient, the supplied dc ripple will increase, so when a larger dc current needs to be supplied, the unit electronic filter circuits need to be used in parallel, specifically, the input terminal of the single unit electronic filter circuit is connected with the input terminals of another or N unit electronic filter circuits to be used as input terminals, and the output terminals thereof are connected together to be used as output terminals.
Further, as shown in fig. 10, when the load has a relatively high current requirement and a relatively high current smoothness requirement, the circuit can be implemented by using a series-parallel hybrid connection of a plurality of unit electronic filter circuits.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (2)
1. The utility model provides a but integrated power filter circuit, includes rectifier circuit, N level ripple direct current charge shift and voltage merge rectifier circuit and N level electronic filter circuit that are connected according to the electric current flow direction electricity in proper order, its characterized in that: the rectifying circuit is composed of a bridge rectifier DW1, and the N-stage pulsating direct current charge shifting and voltage merging rectifying circuit comprises at least N-stage pulsating direct current charge shifting unit circuits and at least N+1-stage voltage merging rectifying unit circuits, wherein each stage of pulsating direct current charge shifting unit circuit is composed of a resistor, a capacitor and a transistor, and each stage of voltage merging rectifying unit circuit is composed of a diode and a transistor; the N-level electronic filter circuit comprises at least one unit electronic filter circuit, wherein each unit electronic filter circuit consists of two triodes, seven resistors, a capacitor and an operational amplifier;
The N-level pulsating direct current charge shifting and voltage merging rectifying circuit comprises nine-level pulsating direct current charge shifting unit circuits and ten-level voltage merging rectifying unit circuits, and the specific circuits comprise resistors R2, R4, R6, R8, R10, R12, R14, R16 and R18, transistors Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, Q11, Q12, Q13, Q14, Q15, Q16, Q17, Q18 and Q19, capacitors CJ1, CJ2, CJ3, CJ4, CJ5, CJ6, CJ7, CJ8 and CJ9, and diodes D1, D2, D3, D4, D5, D6, D7, D8, D9, D10; The N-level electronic filter circuit is formed by connecting two unit electronic filter circuits in series, and specifically comprises resistors R19, R20, R21, R22, R23, R24 and R25, triodes Q29 and Q30, an operational amplifier U1A and a capacitor CJ10; The positive electrode of the input end of the bridge rectifier DW1 is connected with the L end of 220V/50Hz alternating current, the negative electrode of the input end is connected with the N end of 220V/50Hz alternating current, the negative electrode of the output end is grounded, the positive electrode of the output end is respectively connected with one end of a resistor R2, the source electrode of a transistor Q2 and the anode of a diode D1, the other end of the resistor R2 is respectively connected with the grid electrode of the transistor Q2 and one end of a capacitor CJ1, the drain electrode of the transistor Q2 is connected with the other end of the capacitor CJ1, the anode of the diode D2, one end of a resistor R4 and the source electrode of the transistor Q4, and the cathode of the diode D1 is respectively connected with the source electrode and the grid electrode of the transistor Q1; The cathode of the diode D2 is respectively connected with the source electrode and the grid electrode of the transistor Q3; the other end of the resistor R4 is respectively connected with the grid electrode of the transistor Q4 and one end of the capacitor CJ2, the drain electrode of the transistor Q4 is connected with the other end of the capacitor CJ2, the anode of the diode D3, one end of the resistor R6 and the source electrode of the transistor Q6, and the cathode of the diode D3 is respectively connected with the source electrode and the grid electrode of the transistor Q5; the other end of the resistor R6 is respectively connected with the grid electrode of the transistor Q6 and one end of the capacitor CJ3, the drain electrode of the transistor Q6 is connected with the other end of the capacitor CJ3, the anode of the diode D4, one end of the resistor R8 and the source electrode of the transistor Q8, and the cathode of the diode D4 is respectively connected with the source electrode and the grid electrode of the transistor Q7; the other end of the resistor R8 is respectively connected with the grid electrode of the transistor Q8 and one end of the capacitor CJ4, the drain electrode of the transistor Q8 is connected with the other end of the capacitor CJ4, the anode of the diode D5, one end of the resistor R10 and the source electrode of the transistor Q10, and the cathode of the diode D5 is respectively connected with the source electrode and the grid electrode of the transistor Q9; the other end of the resistor R10 is respectively connected with the grid electrode of the transistor Q10 and one end of the capacitor CJ5, the drain electrode of the transistor Q10 is connected with the other end of the capacitor CJ5, the anode of the diode D6, one end of the resistor R12 and the source electrode of the transistor Q12, and the cathode of the diode D6 is respectively connected with the source electrode and the grid electrode of the transistor Q11; The other end of the resistor R12 is respectively connected with the grid electrode of the transistor Q12 and one end of the capacitor CJ6, the drain electrode of the transistor Q12 is connected with the other end of the capacitor CJ6, the anode of the diode D7, one end of the resistor R14 and the source electrode of the transistor Q14, and the cathode of the diode D7 is respectively connected with the source electrode and the grid electrode of the transistor Q13; the other end of the resistor R14 is respectively connected with the grid electrode of the transistor Q14 and one end of the capacitor CJ7, the drain electrode of the transistor Q14 is connected with the other end of the capacitor CJ7, the anode of the diode D8, one end of the resistor R16 and the source electrode of the transistor Q16, and the cathode of the diode D8 is respectively connected with the source electrode and the grid electrode of the transistor Q15; The other end of the resistor R16 is respectively connected with the grid electrode of the transistor Q16 and one end of the capacitor CJ8, the drain electrode of the transistor Q16 is connected with the other end of the capacitor CJ8, the anode of the diode D9, one end of the resistor R18 and the source electrode of the transistor Q18, and the cathode of the diode D9 is respectively connected with the source electrode and the grid electrode of the transistor Q17; the other end of the resistor R18 is respectively connected with the grid electrode of the transistor Q18 and one end of the capacitor CJ9, the drain electrode of the transistor Q18 is connected with the other end of the capacitor CJ9 and the anode of the diode D10, and the cathode of the diode D10 is respectively connected with the source electrode and the grid electrode of the transistor Q19; The drain electrode of the transistor Q1, the drain electrode of the transistor Q3, the drain electrode of the transistor Q5, the drain electrode of the transistor Q7, the drain electrode of the transistor Q9, the drain electrode of the transistor Q11, the drain electrode of the transistor Q13, the drain electrode of the transistor Q15, the drain electrode of the transistor Q17 and the drain electrode of the transistor Q19 are connected with one end of a resistor R20, the collector electrode of a triode Q29 and the collector electrode of a triode Q30, the other end of the resistor R20 is connected with the base electrode of the triode Q29, one end of a resistor R21, one end of a resistor R25 and one end of a resistor R23, the emitter electrode of the triode Q29 is connected with the base electrode of the triode Q30 and the other end of the resistor R21 and one end of the resistor R19, The other end of the resistor R19 is connected with the emitter of the triode Q30 to form an output end anode vled+; The other end of the resistor R24 is connected with the No. 3 pin of the operational amplifier U1A and one end of the capacitor CJ10, the other end of the capacitor CJ10 is connected with the No. 4 pin of the operational amplifier U1A and the other end of the resistor R23, and then the other end of the resistor R24 is grounded to form an output end cathode, the No. 2 pin of the operational amplifier U1A is connected with one end of the resistor R22, the other end of the resistor R22 is connected with the other end of the resistor R25 and the No.1 pin of the operational amplifier U1A, and the No. 8 pin of the operational amplifier is externally connected with a linear power supply VDD.
2. An integrable power supply filter circuit according to claim 1, wherein: the transistors Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, Q11, Q12, Q13, Q14, Q15, Q16, Q17, Q18, Q19 are N-channel MOS transistors.
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