JPS5446417A - Electronic apparatus - Google Patents
Electronic apparatusInfo
- Publication number
- JPS5446417A JPS5446417A JP11377077A JP11377077A JPS5446417A JP S5446417 A JPS5446417 A JP S5446417A JP 11377077 A JP11377077 A JP 11377077A JP 11377077 A JP11377077 A JP 11377077A JP S5446417 A JPS5446417 A JP S5446417A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- frequency range
- base
- output terminal
- low
- 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.)
- Granted
Links
Landscapes
- Television Receiver Circuits (AREA)
- Details Of Television Systems (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
PURPOSE: To enable a TV receiver, etc., to make the transmission with a signal superposed upon a power voltage by the use of a circuit which has low impedance in a low-frequency range and high impedance in a high-frequency range for signals.
CONSTITUTION: Rectifier circuit REC is connected to input terminals INa and Inb and in a low-frequency range, Q2 is applied at its base with a constant voltage from constant-voltage diode ZD, and Q3 is at its base with a voltage divided between R4 and R5; the comparionn voltage between the both appears at the collector of Q2, by which the collector voltage of output control Q1, thereby keeping constant the voltage between output terminals OUTa and OUTb. In a high-frequency range, on the other hand, the disturbance generated at an output terminal is bypast by R5 and is not applied to Q3 at its base. The impedance viewed from the output terminal is therefore high and signals from signal source SG can be transmitted to the load side of the output terminal
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11377077A JPS5446417A (en) | 1977-09-20 | 1977-09-20 | Electronic apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11377077A JPS5446417A (en) | 1977-09-20 | 1977-09-20 | Electronic apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5446417A true JPS5446417A (en) | 1979-04-12 |
JPS6224991B2 JPS6224991B2 (en) | 1987-06-01 |
Family
ID=14620683
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11377077A Granted JPS5446417A (en) | 1977-09-20 | 1977-09-20 | Electronic apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5446417A (en) |
-
1977
- 1977-09-20 JP JP11377077A patent/JPS5446417A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6224991B2 (en) | 1987-06-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS56149148A (en) | Signal transmission system | |
JPS5429919A (en) | Video signal processing circuit | |
GB1384927A (en) | Amplitude-adjustment circuits for transmitters | |
JPS5446417A (en) | Electronic apparatus | |
JPS6465921A (en) | Waveform shaping circuit | |
JPS5444812A (en) | Receiver | |
JPS53131815A (en) | Phase linear type emphasizer | |
JPS5496314A (en) | Electronic device | |
JPS6464423A (en) | System for transmitting optical signal | |
JPS533767A (en) | Input-output-insulation circuit using photocoupler | |
GB1047522A (en) | Improvements in or relating to variable impedance electrical circuits | |
JPS5525279A (en) | Automatic frequency tuning defeat device | |
JPS5315858A (en) | Spectrum analyzer | |
JPS53106108A (en) | Signal transmitting circuit | |
JPS56162539A (en) | Signal-line driving circuit | |
JPS5723380A (en) | Remote controlled transmitting circuit | |
JPS53138261A (en) | Integrated circuit device | |
JPS5627537A (en) | Active antenna | |
JPS6468135A (en) | Satellite broadcast receiver | |
JPS5779747A (en) | Coupling circuit | |
JPS5293233A (en) | Camera for color television | |
JPS55658A (en) | Amplitude modulation device | |
JPS5417053A (en) | Analog input device | |
JPS57106208A (en) | Ssb receiver | |
JPS5422101A (en) | Stereo modulation equipment |