JPS57123741A - Broadcast receiver - Google Patents
Broadcast receiverInfo
- Publication number
- JPS57123741A JPS57123741A JP873381A JP873381A JPS57123741A JP S57123741 A JPS57123741 A JP S57123741A JP 873381 A JP873381 A JP 873381A JP 873381 A JP873381 A JP 873381A JP S57123741 A JPS57123741 A JP S57123741A
- Authority
- JP
- Japan
- Prior art keywords
- impedance
- circuit
- voltage supply
- supply circuit
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 abstract 4
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- 230000003247 decreasing effect Effects 0.000 abstract 2
- 230000003321 amplification Effects 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Noise Elimination (AREA)
Abstract
PURPOSE:To eliminate the need for a latency time until video and sound stabilization by decreasing the impedance of a circuit, inserted into a broadcast receiver which applies a DC voltage to a varactor diode, for a noise and a ripple component. CONSTITUTION:A filter consists of the 1st coupling capacitor 20 connected to a DC-voltage supply circuit 9, and a high-amplification-degree inverting amplifying circuit 22 whose input terminal is connected to the capacitor 20 while its output terminal is connected to the DC-voltage supply circuit 9 through the 2nd coupling capacitor 21, and this filter is inserted between the ground and the output side of a resistance 19 connected in series to the DC-voltage supply circuit 9. Capacitors 20 and 21 and an amplifying circuit 22 form a negative feedback amplifying circuit, which provides about 100% parallel negative feedback because of its high amplification degree. Therefore, impedance Z viewed from a point A as AC signal operation is decreased remarkably, and a noise and a ripple component are eliminated through the voltage division of a resistance 19 and the impedance Z.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP873381A JPS57123741A (en) | 1981-01-22 | 1981-01-22 | Broadcast receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP873381A JPS57123741A (en) | 1981-01-22 | 1981-01-22 | Broadcast receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57123741A true JPS57123741A (en) | 1982-08-02 |
Family
ID=11701146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP873381A Pending JPS57123741A (en) | 1981-01-22 | 1981-01-22 | Broadcast receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57123741A (en) |
-
1981
- 1981-01-22 JP JP873381A patent/JPS57123741A/en active Pending
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