JPS5446414A - Channel selector - Google Patents
Channel selectorInfo
- Publication number
- JPS5446414A JPS5446414A JP11350677A JP11350677A JPS5446414A JP S5446414 A JPS5446414 A JP S5446414A JP 11350677 A JP11350677 A JP 11350677A JP 11350677 A JP11350677 A JP 11350677A JP S5446414 A JPS5446414 A JP S5446414A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- defeat
- potential
- conducts
- turns
- 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
Landscapes
- Noise Elimination (AREA)
Abstract
PURPOSE: To prevent of an unneeded tone from a speaker when a power switch is turned off, by making long the soundcircuit control time of the defeat circuit of a TV receiver.
CONSTITUTION: At the time when a defeat pulse appears at terminal DEF of control circuit 24 during channel selection, transistor TR 38 of defeat circuit 34 conducts and the lamp of channel display circuit 32 goes out; and then, automatic frequency control circuit 51 stops operating, and TR48 conducts to cut off the output of the sound circuit connected to terminal 49. With the power switch turned off now, the voltage of DC power supply 40 decreases, and TR38 remains OFF with the potential of capacitor 43, but turns ON due to a decrease in base potential; and the emitter potential decreases gradually at a time constant between capacitance 43 and resistance 44 and TR48 is caused to conduct until it turns OFF again, thereby maintaining the output of the sound circuit OFF.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11350677A JPS5446414A (en) | 1977-09-20 | 1977-09-20 | Channel selector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11350677A JPS5446414A (en) | 1977-09-20 | 1977-09-20 | Channel selector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5446414A true JPS5446414A (en) | 1979-04-12 |
Family
ID=14614044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11350677A Pending JPS5446414A (en) | 1977-09-20 | 1977-09-20 | Channel selector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5446414A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56165467U (en) * | 1980-05-08 | 1981-12-08 | ||
JPS58206283A (en) * | 1982-05-26 | 1983-12-01 | Matsushita Electric Ind Co Ltd | Transient sound erasing device |
JPS6052771U (en) * | 1983-09-17 | 1985-04-13 | 株式会社ケンウッド | Satellite broadcasting additional audio operation mode display device |
JPS63276983A (en) * | 1987-05-08 | 1988-11-15 | Sony Corp | Television receiver |
-
1977
- 1977-09-20 JP JP11350677A patent/JPS5446414A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56165467U (en) * | 1980-05-08 | 1981-12-08 | ||
JPS6134764Y2 (en) * | 1980-05-08 | 1986-10-09 | ||
JPS58206283A (en) * | 1982-05-26 | 1983-12-01 | Matsushita Electric Ind Co Ltd | Transient sound erasing device |
JPS6331996B2 (en) * | 1982-05-26 | 1988-06-28 | Matsushita Electric Ind Co Ltd | |
JPS6052771U (en) * | 1983-09-17 | 1985-04-13 | 株式会社ケンウッド | Satellite broadcasting additional audio operation mode display device |
JPH0127331Y2 (en) * | 1983-09-17 | 1989-08-15 | ||
JPS63276983A (en) * | 1987-05-08 | 1988-11-15 | Sony Corp | Television receiver |
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