JPS57194619A - Control circuit for discrimination of auto search stop of receiver - Google Patents

Control circuit for discrimination of auto search stop of receiver

Info

Publication number
JPS57194619A
JPS57194619A JP8035781A JP8035781A JPS57194619A JP S57194619 A JPS57194619 A JP S57194619A JP 8035781 A JP8035781 A JP 8035781A JP 8035781 A JP8035781 A JP 8035781A JP S57194619 A JPS57194619 A JP S57194619A
Authority
JP
Japan
Prior art keywords
auto search
signal
stop
frequency
circuit
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
JP8035781A
Other languages
Japanese (ja)
Inventor
Kazuyuki Matsuyama
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP8035781A priority Critical patent/JPS57194619A/en
Publication of JPS57194619A publication Critical patent/JPS57194619A/en
Pending 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
    • H03J7/18—Automatic scanning over a band of frequencies

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To prevent evil influence upon reception characteristics by supplying or intercepting an intermediate frequency signal input to an auto search stop discriminating circuit in accordance with the presence or absence of a signal for showing auto search operation. CONSTITUTION:When a receiver starts auto search tuning operation, a signal Sm for showing auto search operation is generated and then a switch circuit 3 turns on. Therefore, the intermediate frequency signal that an intermediate frequency amplifying circuit 2 outputs in accordance with the reception frequency of a tuner 1 is inputted to an auto search stop discriminating circuit 5 through the switch circuit 3. This discriminating circuit 5 counts the frequency of the input signal or the signal obtained by converting the frequency of it, and when it is discriminated by the counting result that tuning is complete, an auto search stop signal St is generated to stop the auto search operation.
JP8035781A 1981-05-27 1981-05-27 Control circuit for discrimination of auto search stop of receiver Pending JPS57194619A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8035781A JPS57194619A (en) 1981-05-27 1981-05-27 Control circuit for discrimination of auto search stop of receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8035781A JPS57194619A (en) 1981-05-27 1981-05-27 Control circuit for discrimination of auto search stop of receiver

Publications (1)

Publication Number Publication Date
JPS57194619A true JPS57194619A (en) 1982-11-30

Family

ID=13715997

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8035781A Pending JPS57194619A (en) 1981-05-27 1981-05-27 Control circuit for discrimination of auto search stop of receiver

Country Status (1)

Country Link
JP (1) JPS57194619A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0182049A2 (en) * 1984-09-26 1986-05-28 Nec Corporation Am/fm receiver with automatic tuning system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55165023A (en) * 1979-06-12 1980-12-23 Alps Electric Co Ltd Channel selection unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55165023A (en) * 1979-06-12 1980-12-23 Alps Electric Co Ltd Channel selection unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0182049A2 (en) * 1984-09-26 1986-05-28 Nec Corporation Am/fm receiver with automatic tuning system

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