JPS5446414A - Channel selector - Google Patents

Channel selector

Info

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
Application number
JP11350677A
Other languages
Japanese (ja)
Inventor
Masahiro Takeshita
Kazumi Kawashima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP11350677A priority Critical patent/JPS5446414A/en
Publication of JPS5446414A publication Critical patent/JPS5446414A/en
Pending legal-status Critical Current

Links

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
JP11350677A 1977-09-20 1977-09-20 Channel selector Pending JPS5446414A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (7)

* Cited by examiner, † Cited by third party
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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