JPS5635527A - Afc defeating device - Google Patents

Afc defeating device

Info

Publication number
JPS5635527A
JPS5635527A JP11146479A JP11146479A JPS5635527A JP S5635527 A JPS5635527 A JP S5635527A JP 11146479 A JP11146479 A JP 11146479A JP 11146479 A JP11146479 A JP 11146479A JP S5635527 A JPS5635527 A JP S5635527A
Authority
JP
Japan
Prior art keywords
voltage
afc
power supply
transistor
conducts
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
Application number
JP11146479A
Other languages
Japanese (ja)
Other versions
JPS6131646B2 (en
Inventor
Masaaki Fujita
Tetsuo Kuchiki
Toshimitsu Fujimori
Akira Usui
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 JP11146479A priority Critical patent/JPS5635527A/en
Publication of JPS5635527A publication Critical patent/JPS5635527A/en
Publication of JPS6131646B2 publication Critical patent/JPS6131646B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/023—Neutralization of the automatic frequency correction during a tuning change

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To realize an AFC defeating action at the application of the power source without using any capacitor, by applying the collector output of the 2nd switching transistor to the control point of action of the AFC circuit. CONSTITUTION:With the application of the power supply switch, the power supply voltage A increases along with the increment of the voltage A' divided by the partial pressure resistances 23 and 24. Here the switching level at which the transistor 25 conducts is set to the voltage at the time a little before the moment when the power supply voltage reaches the fixed voltage VCC. For this purpose, the resistances 23 and 24 are set previously. Then the transistor 26 conducts while the voltage B exists to drop the base bias voltage D of the transistors 14, 15 and 16 each in the AFC circuit 6. The base bias voltage of these transistors are then cut off to discontinue the working of the circuit 6.
JP11146479A 1979-08-30 1979-08-30 Afc defeating device Granted JPS5635527A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11146479A JPS5635527A (en) 1979-08-30 1979-08-30 Afc defeating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11146479A JPS5635527A (en) 1979-08-30 1979-08-30 Afc defeating device

Publications (2)

Publication Number Publication Date
JPS5635527A true JPS5635527A (en) 1981-04-08
JPS6131646B2 JPS6131646B2 (en) 1986-07-22

Family

ID=14561895

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11146479A Granted JPS5635527A (en) 1979-08-30 1979-08-30 Afc defeating device

Country Status (1)

Country Link
JP (1) JPS5635527A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61174223U (en) * 1985-04-17 1986-10-30

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5055205A (en) * 1973-09-11 1975-05-15

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5055205A (en) * 1973-09-11 1975-05-15

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61174223U (en) * 1985-04-17 1986-10-30

Also Published As

Publication number Publication date
JPS6131646B2 (en) 1986-07-22

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