WO2011031003A2 - 스위치드 커패시터 회로 - Google Patents
스위치드 커패시터 회로 Download PDFInfo
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- WO2011031003A2 WO2011031003A2 PCT/KR2010/004512 KR2010004512W WO2011031003A2 WO 2011031003 A2 WO2011031003 A2 WO 2011031003A2 KR 2010004512 W KR2010004512 W KR 2010004512W WO 2011031003 A2 WO2011031003 A2 WO 2011031003A2
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/005—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements using switched capacitors, e.g. dynamic amplifiers; using switched capacitors as resistors in differential amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/70—Charge amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F3/211—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/45—Differential amplifiers
- H03F3/45071—Differential amplifiers with semiconductor devices only
- H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
- H03F3/45475—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using IC blocks as the active amplifying circuit
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/45—Differential amplifiers
- H03F3/45071—Differential amplifiers with semiconductor devices only
- H03F3/45479—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection
- H03F3/45928—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection using IC blocks as the active amplifying circuit
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H19/00—Networks using time-varying elements, e.g. N-path filters
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H19/00—Networks using time-varying elements, e.g. N-path filters
- H03H19/004—Switched capacitor networks
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/45—Indexing scheme relating to differential amplifiers
- H03F2203/45512—Indexing scheme relating to differential amplifiers the FBC comprising one or more capacitors, not being switched capacitors, and being coupled between the LC and the IC
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/45—Indexing scheme relating to differential amplifiers
- H03F2203/45514—Indexing scheme relating to differential amplifiers the FBC comprising one or more switched capacitors, and being coupled between the LC and the IC
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/45—Indexing scheme relating to differential amplifiers
- H03F2203/45534—Indexing scheme relating to differential amplifiers the FBC comprising multiple switches and being coupled between the LC and the IC
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/45—Indexing scheme relating to differential amplifiers
- H03F2203/45631—Indexing scheme relating to differential amplifiers the LC comprising one or more capacitors, e.g. coupling capacitors
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/45—Indexing scheme relating to differential amplifiers
- H03F2203/45644—Indexing scheme relating to differential amplifiers the LC comprising a cross coupling circuit, e.g. comprising two cross-coupled transistors
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/45—Indexing scheme relating to differential amplifiers
- H03F2203/45724—Indexing scheme relating to differential amplifiers the LC comprising two cross coupled switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/45—Indexing scheme relating to differential amplifiers
- H03F2203/45726—Indexing scheme relating to differential amplifiers the LC comprising more than one switch, which are not cross coupled
Definitions
- the present invention relates to a semiconductor circuit, and more particularly to a switched capacitor circuit.
- switched capacitor circuits are widely used to improve integration and design low-power circuits.
- the performance of these switched capacitor circuits is rapidly improving with the development of CMOS analog circuit technology.
- Switched capacitor circuits are used in a variety of analog circuits such as integrators, adders, analog filters, analog-to-digital converters (ADCs), and digital-to-analog converters (DACs).
- One of the main blocks of the switched capacitor circuit is an operational amplifier.
- Such an operation amplifier has a problem of high power consumption and a large area. Therefore, the use of relatively low power inverting amplifiers instead of operational amplifiers in switched capacitor circuits is increasing.
- An object of the present invention is to provide a switched capacitor circuit that can reduce the power consumption and area while widening the application range of the semiconductor circuit.
- a switched capacitor circuit includes an inverting amplifier for removing the offset using a chopper stabilization circuit; A sampling unit connected between an input terminal and the inverting amplifier; And a feedback unit connected in parallel to the inverting amplifier.
- the inverting amplifier comprises: a pair of differential inverters; A first chopper stabilization circuit connected to an input terminal of the inverter pair and periodically inverting an input signal and transferring the inverted pair to the inverter pair; And a second chopper stabilization circuit connected to an output terminal of the pair of inverters and periodically inverting the output signal of the pair of inverters and transferring the output signal to the output terminal.
- the first chopper stabilization circuit may include: a fifth switch pair configured to transfer the signal of the third node pair to the inverter pair as it is turned on in response to a first chopping signal; And a sixth switch pair which, when turned on in response to a second chopping signal, inverts and transmits the signal of the third node pair to the inverter pair.
- the second chopper stabilization circuit may include: a seventh switch pair which, when turned on in response to a third chopping signal, transfers the output signal of the inverter pair as it is to the output terminal; And an eighth switch pair which, when turned on in response to a fourth chopping signal, inverts and outputs the output signal of the inverter pair to the output terminal.
- the first chopping signal and the second chopping signal for controlling the first chopper stabilization circuit may be two-phase clocks that do not overlap each other.
- the third chopping signal and the fourth chopping signal for controlling the second chopper stabilization circuit may be two-phase clocks that do not overlap each other.
- the first chopping signal and the third chopping signal may be clocks overlapping each other with a difference in a duration of a pulse.
- the second chopping signal and the fourth chopping signal are clocks overlapping each other with a difference in the duration of a pulse.
- the first control signal and the second control signal are two-phase clocks that do not overlap each other.
- the first chopper stabilization circuit may include: a first switch pair for allowing an input signal to be delivered to an output terminal of the first chopper stabilization circuit if it is turned on in response to a first chopper signal; And a second switch pair which, when turned on in response to the second chopping signal, causes the input signal to be inverted and transmitted to an output terminal of the first chopper stabilization circuit.
- the second chopper stabilization circuit may include: a third switch pair for allowing an input signal to be transmitted to the output terminal as it is turned on in response to a third chopping signal; And a fourth switch pair which, when turned on in response to a fourth chopping signal, causes an input signal to be inverted and transmitted to the output terminal.
- FIG. 2 is a circuit diagram illustrating a first embodiment of the switched capacitor circuit 100 shown in FIG. 1.
- FIG. 4 is a circuit diagram illustrating a third embodiment of the switched capacitor circuit 100 shown in FIG. 1.
- FIG. 5 shows a signal waveform used in the switched capacitor circuit 400 of FIG. 4.
- the switched capacitor circuit 100 includes a sampling unit 110, feedback units 120 and 130, and an amplifier 140.
- the sampling unit 110 is connected between the input terminals INP and INM and the amplifier 140.
- the feedback units 120 and 130 and the amplifier 140 are connected in parallel between the sampling unit 110 and the output terminals OUTP and OUTM.
- the sampling unit 110 charges a charge by an input voltage applied to the input terminals INP and INM in the sampling mode.
- the sampling unit 110 transmits the charges charged in the sampling unit 110 to the feedback units 120 and 130 in the integration mode. This is accomplished by a feedback loop formed by the feedback units 120, 130 and the amplifier 140.
- the operation of the switched capacitor circuit 100 will be described in more detail below.
- the sampling unit 210 is connected between the input terminals INP and INM and the operation amplifier 240.
- the feedback units 220 and 230 and the operation amplifier 240 are connected in parallel between the sampling unit 210 and the output terminals OUTP and OUTM.
- the sampling unit 210 includes switch pairs S 1A , S 1B , S 2A , S 2B , S 3A , S 3B , S 4A , S 4B , and a capacitor pair C 1A , C 1B .
- the switch pairs S 1A and S 1B are connected between the input terminals INP and INM and the node pairs N 1A and N 1B , respectively.
- the switch pairs S 2A and S 2B are connected between the node pairs N 1A and N 1B and ground, respectively.
- the switch pairs S 3A and S 3B are connected between the node pairs N 2A and N 2B and ground, respectively.
- the switch pairs S 4A and S 4B are connected between the node pairs N 2A and N 2B and the node pairs N 3A and N 3B , respectively.
- Capacitor pairs C 1A and C 1B are connected between node pairs N 1A and N 1B and node pairs N 2A and N 2B , respectively.
- Feedback units 220 and 230 are capacitor pairs C 2A and C 2B .
- the switch pairs S 1A , S 1B , S 3A , S 3B are turned on in response to the first control signal ⁇ 1 , and the switch pairs S 2A , S 2B , S 4A , S 4B are Is turned off.
- the sampling unit 210 charges the capacitor pairs C 1A and C 1B by an input voltage applied to the input terminals INP and INM.
- Switch pairs S 1A and S 1B S 3A and S 3B are turned off in response to the second control signal ⁇ 2 in the integral mode and switch pairs S 2A and S 2B S 4A and S 4B Is turned on.
- charges charged in capacitor pairs C 1A and C 1B are transferred to capacitor pairs C 2A and C 2B . This is done by a feedback loop formed by the capacitor pairs C 2A , C 2B and the operational amplifier 240.
- the switched capacitor circuit 200 operates as an integrator while repeating the sampling mode and the integration mode.
- the sampling unit 310 is connected between the input terminals INP and INM and the offset capacitor pairs C OSA and C OSB .
- the feedback units 320 and 330 are connected between the sampling unit 310 and the output terminals OUTP and OUTM.
- Offset capacitor pairs C OSA , C OSB are connected between sampling unit 310 and inverting amplifier 340.
- the inverting amplifier 340 and the offset switch pairs S OSA and S OSB are connected in parallel between the offset capacitor pairs C OSA and C OSB and the output terminals OUTP and OUTM, respectively.
- Sampling unit 310 includes switch pairs S 5A , S 5B , S 6A , S 6B , S 7A , S 7B , and capacitor pair C 3A , C 3B .
- the switch pairs S 5A and S 5B are connected between the input terminals INP and INM and the node pairs N 4A and N 4B , respectively.
- the switch pairs S 6A and S 6B are connected between the node pairs N 5A and N 5B and ground, respectively.
- the switch pairs S 7A and S 7B are connected between the node pairs N 5A and N 5B and ground, respectively.
- Capacitor pairs C 3A and C 3B are connected between node pairs N 4A and N 4B and node pairs N 5A and N 5B , respectively.
- Feedback units 320 and 330 include switch pairs S 8A and S 8B and capacitor pairs C 4A and C 4B .
- Switch pairs S 8A and S 8B are connected to capacitor pairs C 4A and C 4B , respectively.
- Inverting amplifier 340 includes an inverter (INV) pair and a common mode feedback circuit (CMFB).
- the common mode feedback circuit CMFB is connected between the output terminals OUTP and OUTM.
- the common mode feedback circuit (CMFB) stabilizes the output signal of the switched capacitor circuit implemented in a differential form.
- the switch pairs (S OSA, OSB S) is turned on in response to the first control signal ( ⁇ 1). At the same time, the input and output of the INV pair are shorted. Charges corresponding to the offset voltage of the inverter INV pair are charged to the offset capacitor pairs C OSA and C OSB . Since the inverter (INV) pair is open internally even after the change to the integral mode, the offset voltage is maintained in the offset capacitor pair (C OSA , C OSB ).
- the operation in the sampling mode and the integration mode except for the operation of charging and maintaining the offset voltage is substantially the same as the operation of the switched capacitor circuit 200 of FIG. Therefore, description thereof is omitted. As a result, since the switched capacitor circuit 300 uses the inverting amplifier 340 instead of the operation amplifier 240, power consumption and circuit area are considerably reduced.
- the switched capacitor circuit 400 includes a sampling unit 410, feedback units 420 and 430, and an inverting amplifier 440.
- the inverting amplifier 440 includes chopper stabilization circuits 441 and 442.
- the chopper stabilization circuits 441 and 442 allow the inverting amplifier 440 to stably amplify the signal without using offset capacitor pairs C OSA and C OSB .
- the chopper stabilization circuits 441 and 442 can eliminate the offset capacitor pairs C OSA and C OSB from the switched capacitor circuit 300 of FIG. 3, further reducing power consumption and circuit area.
- sampling unit 410 and the feedback units 420 and 430 of FIG. 4 are configured substantially the same as those shown in FIG. 2. Therefore, description thereof is omitted.
- Inverting amplifier 440 with chopper stabilization includes an inverter (INV) pair, a common mode feedback circuit (CMFB), a first chopper stabilization circuit 441, and a second chopper stabilization circuit 442.
- the first chopper stabilization circuit 441 is connected between the sampling unit 410 and the inverter INV pair.
- the second chopper stabilization circuit 442 is connected between the inverter INV pair and the output terminals OUTP and OUTM.
- the common mode feedback circuit CMFB is connected between the output terminals OUTP and OUTM.
- the common mode feedback circuit (CMFB) stabilizes the output signal of the switched capacitor circuit implemented in a differential form.
- the second chopper stabilization circuit 442 includes a switch pair S CH3A , S CH3B and a switch pair S CH4A , S CH4B .
- the switch pairs S CH3A and S CH3B which are turned on in response to the third chopping signal ⁇ Ch3 are configured such that the input signal is transferred to the output terminal as it is turned on.
- the switch pairs S CH4A and S CH4B which are turned on in response to the fourth chopping signal ⁇ Ch4 are configured to be inverted and transmitted to the output terminal when the switch pairs S CH4A and S CH4B are turned on.
- the first chopper stabilization circuit 441 periodically inverts the signal input to the inverting amplifier 440 in the integral mode and transfers the signal to the inverter INV pair.
- the second chopper stabilization circuit 442 periodically inverts the signal output from the pair of inverters INV in the integral mode and transmits the signal to the output terminals OUTP and OUTM.
- amplified noise is caused by amplification of unwanted DC signals in amplifiers with high gain. Unnecessary direct current signals are due to the voltage difference (offset) between the input and output of the amplifier.
- offset voltage is maintained by the pair of offset capacitors C OSA and C OSB to equalize the DC voltage difference between the input and the output of the amplifier to eliminate this offset.
- the chopper stabilization circuits 441 and 442 temporarily convert the DC signal to be like an AC signal. This can prevent the unnecessary DC signal from being amplified. Chopper stabilization circuits 441 and 442 can also eliminate flicker noise.
- the switched capacitor circuit 200 of FIG. 2 and the switched capacitor circuit 400 of FIG. 4 perform substantially the same operation in the functional block unit (here, the integrator) by simply replacing the inverting amplifier 440 having the chopper stabilization circuit. Will be
- the first control signal ⁇ 1 and the second control signal ⁇ 2 are nonoverlapping two-phase clocks that do not overlap each other.
- the first chopping signal ⁇ Ch1 and the second chopping signal ⁇ Ch2 controlling the first chopper stabilization circuit 441 are two-phase clocks which do not overlap each other.
- the third chopping signal ⁇ Ch3 and the fourth chopping signal ⁇ Ch4 controlling the second chopper stabilization circuit 442 are two-phase clocks which do not overlap each other.
- the first chopping signal ⁇ Ch1 and the third chopping signal ⁇ Ch3 overlap each other with a difference in the duration of the pulse.
- the second chopping signal ⁇ Ch2 and the fourth chopping signal ⁇ Ch4 overlap each other with a difference in the duration of the pulse.
- the chopping signals ⁇ Ch1 to ⁇ Ch4 are changed from the high potential (low potential) to the low potential in the sampling mode. High potential).
- the chopping signal is high potential (low potential) in the current integration mode, the pattern continues to be inverted to low potential (high potential) in the next integration mode.
- FIG. 6 is a circuit diagram illustrating a fourth embodiment of the switched capacitor circuit 100 shown in FIG. 1.
- the switched capacitor circuit 500 includes a sampling unit 510, feedback units 520 and 530, and an inverting amplifier 540.
- Inverting amplifier 540 has a structure substantially the same as inverting amplifier 440 of FIG. Therefore, offset capacitor pairs C OSA and C OSB for removing amplified noise may be eliminated.
- the switched capacitor circuit 500 of FIG. 6 has a basic structure similar to that of the switched capacitor circuit 400 of FIG. 4.
- the sampling unit 510 of FIG. 6 includes two sampling units 410 shown in FIG. 4. Therefore, the switched capacitor circuit 500 of FIG. 6 functions as an adder that adds each input voltage applied to the first input terminals IN1P and IN1M and the second input terminals IN2P and IN2M.
- more sampling units 410 may be included to implement adders for more input voltages.
- the feedback units 520 and 530 are connected between each end of the feedback capacitor and the ground, and switch pairs S 10A and S 10B that are turned on in response to the first control signal ⁇ 1 and S 11A and S 11B .
- the control signal includes a second ( ⁇ 2) switches that are turned on in response to the pairs (S 9A, S 9B) ( S 12A, S 12B).
- the switched capacitor circuit of the present invention can be modified and applied in various forms.
- a sigma-delta modulator that uses a switched capacitor circuit of the present invention to be a low band filter for an input voltage and a high band filter for noise;
- CDS correlated double sampling
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Abstract
Description
Claims (15)
- 초퍼 안정화 회로를 사용하여 옵셋을 제거하기 위한 반전 증폭기;입력 단자와 상기 반전 증폭기 사이에 연결되는 샘플링 유닛; 및상기 반전 증폭기에 병렬 연결되는 피드백 유닛을 포함하는 스위치드 커패시터 회로.
- 제 1 항에 있어서,상기 반전 증폭기는,차동 형태의 반전기 쌍;상기 반전기 쌍의 입력단에 연결되며, 입력 신호를 주기적으로 반전시켜 상기 반전기 쌍에 전달하는 제 1 초퍼 안정화 회로;상기 반전기 쌍의 출력단에 연결되며, 상기 반전기 쌍의 출력 신호를 주기적으로 반전시켜 출력 단자에 전달하는 제 2 초퍼 안정화 회로를 포함하는 스위치드 커패시터 회로.
- 제 2 항에 있어서,상기 샘플링 유닛은,상기 입력 단자와 제 1 노드 쌍 사이에 연결되며, 제 1 제어 신호에 응답하여 턴온되는 제 1 스위치 쌍;상기 제 1 노드 쌍과 접지 사이에 연결되며, 제 2 제어 신호에 응답하여 턴온되는 제 2 스위치 쌍;제 2 노드 쌍과 접지 사이에 연결되며, 상기 제 1 제어 신호에 응답하여 턴온되는 제 3 스위치 쌍;상기 제 2 노드 쌍과 제 3 노드 쌍 사이에 연결되며, 상기 제 2 제어 신호에 응답하여 턴온되는 제 4 스위치 쌍; 및상기 제 1 노드 쌍과 상기 제 2 노드 쌍 사이에 연결된 샘플링 커패시터 쌍을 포함하는 스위치드 커패시터 회로.
- 제 3 항에 있어서,상기 피드백 유닛은, 피드백 커패시터 쌍을 포함하는 스위치드 커패시터 회로.
- 제 4 항에 있어서,상기 제 1 초퍼 안정화 회로는,제 1 초핑 신호에 응답하여 턴온되면 상기 제 3 노드 쌍의 신호를 상기 반전기 쌍으로 그대로 전달되도록 하는 제 5 스위치 쌍; 및제 2 초핑 신호에 응답하여 턴온되면 상기 제 3 노드 쌍의 신호를 상기 반전기 쌍으로 반전되어 전달되도록 하는 제 6 스위치 쌍을 포함하는 스위치드 커패시터 회로.
- 제 5 항에 있어서,상기 제 2 초퍼 안정화 회로는,제 3 초핑 신호에 응답하여 턴온되면 상기 반전기 쌍의 출력 신호를 상기 출력 단자로 그대로 전달되도록 하는 제 7 스위치 쌍; 및제 4 초핑 신호에 응답하여 턴온되면 상기 반전기 쌍의 출력 신호를 상기 출력 단자로 반전되어 전달되도록 하는 제 8 스위치 쌍을 포함하는 스위치드 커패시터 회로.
- 제 6 항에 있어서,상기 제 1 초퍼 안정화 회로를 제어하는 상기 제 1 초핑 신호와 상기 제 2 초핑 신호는 서로 겹치지 않는 2 상 클럭인 스위치드 커패시터 회로.
- 제 7 항에 있어서,상기 제 2 초퍼 안정화 회로를 제어하는 상기 제 3 초핑 신호와 상기 제 4 초핑 신호는 서로 겹치지 않는 2 상 클럭인 스위치드 커패시터 회로.
- 제 8 항에 있어서,상기 제 1 초핑 신호와 상기 제 3 초핑 신호는 펄스의 지속 시간의 차이를 두고 서로 겹치는 클럭인 스위치드 커패시터 회로.
- 제 9 항에 있어서,상기 제 2 초핑 신호와 상기 제 4 초핑 신호는 펄스의 지속 시간의 차이를 두고 서로 겹치는 클럭인 스위치드 커패시터 회로.
- 제 6 항에 있어서,서로 병렬 연결되는 복수 개의 샘플링 유닛;상기 피드백 커패시터 쌍의 한쪽 단에 연결되며, 상기 제 2 제어 신호에 응답하여 턴온되는 제 9 스위치 쌍;상기 피드백 커패시터 쌍의 상기 한쪽 단과 접지 사이에 연결되며, 상기 제 1 제어 신호에 응답하여 턴온되는 제 10 스위치 쌍;상기 피드백 커패시터 쌍의 다른 한쪽 단과 접지 사이에 연결되며, 상기 제 1 제어 신호에 응답하여 턴온되는 제 11 스위치 쌍; 및상기 피드백 커패시터 쌍의 상기 다른 한쪽 단에 연결되며, 상기 제 2 제어 신호에 응답하여 턴온되는 제 12 스위치 쌍을 더 포함하는 스위치드 커패시터 회로.
- 제 11 항에 있어서,상기 제 1 제어 신호와 상기 제 2 제어 신호는 서로 겹치지 않는 2 상 클럭인 스위치드 커패시터 회로.
- 차동 형태의 반전기 쌍;상기 반전기 쌍의 입력단에 연결되며, 입력 신호를 주기적으로 반전시켜 상기 반전기 쌍에 전달하는 제 1 초퍼 안정화 회로;상기 반전기 쌍의 출력단에 연결되며, 상기 반전기 쌍의 출력 신호를 주기적으로 반전시켜 출력 단자에 전달하는 제 2 초퍼 안정화 회로를 포함하는 반전 증폭기.
- 제 13 항에 있어서,상기 제 1 초퍼 안정화 회로는,제 1 초핑 신호에 응답하여 턴온되면 입력 신호가 상기 제 1 초퍼 안정화 회로의 출력단으로 그대로 전달되도록 하는 제 1 스위치 쌍; 및제 2 초핑 신호에 응답하여 턴온되면 입력 신호가 상기 제 1 초퍼 안정화 회로의 출력단으로 반전되어 전달되도록 하는 제 2 스위치 쌍을 포함하는 반전 증폭기.
- 제 14 항에 있어서,상기 제 2 초퍼 안정화 회로는,제 3 초핑 신호에 응답하여 턴온되면 입력 신호가 상기 출력 단자로 그대로 전달되도록 하는 제 3 스위치 쌍; 및제 4 초핑 신호에 응답하여 턴온되면 입력 신호가 상기 출력 단자로 반전되어 전달되도록 하는 제 4 스위치 쌍을 포함하는 반전 증폭기.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012528734A JP2013504920A (ja) | 2009-09-10 | 2010-07-12 | スイッチトキャパシタ回路 |
| US13/395,277 US8723597B2 (en) | 2009-09-10 | 2010-07-12 | Switched capacitor circuit |
| CN2010800509632A CN102687392A (zh) | 2009-09-10 | 2010-07-12 | 开关式电容器电路 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020090085217A KR101087246B1 (ko) | 2009-09-10 | 2009-09-10 | 스위치드 커패시터 회로 |
| KR10-2009-0085217 | 2009-09-10 |
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| Publication Number | Publication Date |
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| WO2011031003A2 true WO2011031003A2 (ko) | 2011-03-17 |
| WO2011031003A3 WO2011031003A3 (ko) | 2011-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/KR2010/004512 Ceased WO2011031003A2 (ko) | 2009-09-10 | 2010-07-12 | 스위치드 커패시터 회로 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8723597B2 (ko) |
| JP (1) | JP2013504920A (ko) |
| KR (1) | KR101087246B1 (ko) |
| CN (1) | CN102687392A (ko) |
| WO (1) | WO2011031003A2 (ko) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014083736A1 (ja) * | 2012-11-30 | 2014-06-05 | パナソニック株式会社 | スイッチトキャパシタ回路及びその駆動方法 |
| US9491385B2 (en) | 2013-07-09 | 2016-11-08 | Panasonic Corporation | Switched capacitor circuit and method for driving the same |
| DE102013211557B4 (de) * | 2012-06-19 | 2017-05-24 | Infineon Technologies Ag | System und verfahren für eine schaltung mit geschalteten kondensatoren |
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| US8890608B2 (en) * | 2012-02-29 | 2014-11-18 | Texas Instruments Incorporated | Digital input class-D audio amplifier |
| JP6268726B2 (ja) * | 2013-03-21 | 2018-01-31 | セイコーエプソン株式会社 | 温度補正回路、物理量検出装置、電子機器及び移動体 |
| KR102092904B1 (ko) * | 2013-11-06 | 2020-03-24 | 삼성전자주식회사 | 스위치드-커패시터 적분기, 이의 동작 방법, 및 이를 포함하는 장치들 |
| US9525426B2 (en) * | 2015-02-05 | 2016-12-20 | Infineon Technologies Ag | Cross-coupled input voltage sampling and driver amplifier flicker noise cancellation in a switched capacitor analog-to-digital converter |
| JP6796953B2 (ja) * | 2016-06-02 | 2020-12-09 | エイブリック株式会社 | 増幅回路、及びマルチパスネステッドミラー増幅回路 |
| EP3300251B1 (en) * | 2016-09-27 | 2020-11-18 | ams International AG | Integration circuit and method for providing an output signal |
| US10594311B2 (en) * | 2016-11-07 | 2020-03-17 | Mediatek Inc. | Driver circuit |
| IT201700071213A1 (it) * | 2017-06-26 | 2018-12-26 | St Microelectronics Srl | Circuito di lettura per sensori hall, dispositivo e procedimento corrispondenti |
| CN107271054A (zh) * | 2017-07-28 | 2017-10-20 | 合肥芯福传感器技术有限公司 | 一种全差分红外焦平面阵列读出电路 |
| WO2019229678A1 (en) * | 2018-05-30 | 2019-12-05 | King Abdullah University Of Science And Technology | Successive approximation register (sar) analog to digital converter (adc) |
| CN109743032B (zh) * | 2019-01-08 | 2020-09-11 | 北京智芯微电子科技有限公司 | 具有共模反馈控制电路的反相伪全差分放大器 |
| US11061100B2 (en) | 2019-06-12 | 2021-07-13 | Texas Instruments Incorporated | System for continuous calibration of hall sensors |
| US11867773B2 (en) * | 2019-06-18 | 2024-01-09 | Texas Instruments Incorporated | Switched capacitor integrator circuit with reference, offset cancellation and differential to single-ended conversion |
| KR102301728B1 (ko) * | 2020-02-21 | 2021-09-13 | 동국대학교 산학협력단 | 스위치-커패시터 적분기를 이용한 이미지 마스크 처리 회로 및 방법 |
| CN112564711B (zh) * | 2021-02-20 | 2021-06-01 | 坤元微电子(南京)有限公司 | 一种连续时间斩波Delta Sigma调制器 |
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| US6529070B1 (en) * | 1999-10-25 | 2003-03-04 | Texas Instruments Incorporated | Low-voltage, broadband operational amplifier |
| US6456159B1 (en) * | 2000-09-08 | 2002-09-24 | Analog Devices, Inc. | CMOS operational amplifier |
| US20030146786A1 (en) * | 2002-02-04 | 2003-08-07 | Kush Gulati | ADC having chopper offset cancellation |
| US6639460B1 (en) * | 2002-04-16 | 2003-10-28 | Texas Instruments Incorporated | Residual offset correction method and circuit for chopper stabilized amplifiers |
| US7038532B1 (en) * | 2003-04-15 | 2006-05-02 | University Of Rochester | Switched-capacitor high-pass mirrored integrator |
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| KR100794310B1 (ko) * | 2006-11-21 | 2008-01-11 | 삼성전자주식회사 | 스위치드 커패시터 회로 및 그것의 증폭 방법 |
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2009
- 2009-09-10 KR KR1020090085217A patent/KR101087246B1/ko active Active
-
2010
- 2010-07-12 US US13/395,277 patent/US8723597B2/en active Active
- 2010-07-12 CN CN2010800509632A patent/CN102687392A/zh active Pending
- 2010-07-12 WO PCT/KR2010/004512 patent/WO2011031003A2/ko not_active Ceased
- 2010-07-12 JP JP2012528734A patent/JP2013504920A/ja active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013211557B4 (de) * | 2012-06-19 | 2017-05-24 | Infineon Technologies Ag | System und verfahren für eine schaltung mit geschalteten kondensatoren |
| WO2014083736A1 (ja) * | 2012-11-30 | 2014-06-05 | パナソニック株式会社 | スイッチトキャパシタ回路及びその駆動方法 |
| US9491385B2 (en) | 2013-07-09 | 2016-11-08 | Panasonic Corporation | Switched capacitor circuit and method for driving the same |
Also Published As
| Publication number | Publication date |
|---|---|
| US8723597B2 (en) | 2014-05-13 |
| JP2013504920A (ja) | 2013-02-07 |
| KR101087246B1 (ko) | 2011-11-29 |
| WO2011031003A3 (ko) | 2011-05-05 |
| KR20110027221A (ko) | 2011-03-16 |
| US20120229204A1 (en) | 2012-09-13 |
| CN102687392A (zh) | 2012-09-19 |
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