JPS56136020A - Channel searching circuit - Google Patents

Channel searching circuit

Info

Publication number
JPS56136020A
JPS56136020A JP3907880A JP3907880A JPS56136020A JP S56136020 A JPS56136020 A JP S56136020A JP 3907880 A JP3907880 A JP 3907880A JP 3907880 A JP3907880 A JP 3907880A JP S56136020 A JPS56136020 A JP S56136020A
Authority
JP
Japan
Prior art keywords
channel
reception
search
station
control 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
JP3907880A
Other languages
Japanese (ja)
Inventor
Tatsukuni Maeda
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.)
Faurecia Clarion Electronics Co Ltd
Original Assignee
Clarion 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 Clarion Co Ltd filed Critical Clarion Co Ltd
Priority to JP3907880A priority Critical patent/JPS56136020A/en
Publication of JPS56136020A publication Critical patent/JPS56136020A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
    • H03J1/0041—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor for frequency synthesis with counters or frequency dividers
    • H03J1/005—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor for frequency synthesis with counters or frequency dividers in a loop

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To search for a desired station in a short time even if the number of stations is large, by presetting stations which are turned frequently, by successively searching for the station by holding each preset channel in a short time. CONSTITUTION:In response to the operation of channel search key 15, control circuit 13 supplies reception instructions for respective preset channels to PLL circuit 10. In this case, the channels are held for a prescribed time according to the level (articulation) of the detection signal of signal detecting circuit 12. As key 15 is operated, control circuit 13 supplies the reception instruction signal to PLL10 to receive a signal over the 1st preset chennel. Thus, the reception over the 1st channel is done. Control circuit 13, when judging that the 1st channel station can be received articulately, continues the reception for the prescribed time. When not, the next channel is received. The said operation is repeated successively and when a desired station is searched for, channel search stop key 14 is operated to stop the search.
JP3907880A 1980-03-28 1980-03-28 Channel searching circuit Pending JPS56136020A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3907880A JPS56136020A (en) 1980-03-28 1980-03-28 Channel searching circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3907880A JPS56136020A (en) 1980-03-28 1980-03-28 Channel searching circuit

Publications (1)

Publication Number Publication Date
JPS56136020A true JPS56136020A (en) 1981-10-23

Family

ID=12543061

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3907880A Pending JPS56136020A (en) 1980-03-28 1980-03-28 Channel searching circuit

Country Status (1)

Country Link
JP (1) JPS56136020A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5161253A (en) * 1990-05-18 1992-11-03 Pioneer Electronic Corporation Preset scanning method for radio receivers
US5262769A (en) * 1990-04-23 1993-11-16 Reach Electronics, Inc. Programmed scanning pager receiver

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5262769A (en) * 1990-04-23 1993-11-16 Reach Electronics, Inc. Programmed scanning pager receiver
US5161253A (en) * 1990-05-18 1992-11-03 Pioneer Electronic Corporation Preset scanning method for radio receivers

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