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JPS5467309A - Aft circuit - Google Patents

Aft circuit

Info

Publication number
JPS5467309A
JPS5467309A JP13394877A JP13394877A JPS5467309A JP S5467309 A JPS5467309 A JP S5467309A JP 13394877 A JP13394877 A JP 13394877A JP 13394877 A JP13394877 A JP 13394877A JP S5467309 A JPS5467309 A JP S5467309A
Authority
JP
Japan
Prior art keywords
tuner
implementation
frequency
constitution
extent
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
JP13394877A
Other languages
Japanese (ja)
Other versions
JPS6019846B2 (en
Inventor
Shoji Omori
Atsushi Matsuzaki
Kiyonori Tomizawa
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP52133948A priority Critical patent/JPS6019846B2/en
Publication of JPS5467309A publication Critical patent/JPS5467309A/en
Publication of JPS6019846B2 publication Critical patent/JPS6019846B2/en
Expired 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
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant

Landscapes

  • Television Receiver Circuits (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To stabilize temperature characteristics and to simplify IC-implementation by employing digital constitution for a TV receiver. CONSTITUTION:An IF signal obtained from tuner 2 is extracted 10 periodically within a certain time, extraction signals are counted 12, and logic circuits 13 and 14 discriminate judging from the counting output whether or not the IF frequency is within the fixed extent; when it is without the extent, a voltage equivalent to the exceeding direction is supplied to local oscillation part 5 of tuner 2, thereby controlling its frequency. Consequently, the IC-implementation can be simplified.
JP52133948A 1977-11-08 1977-11-08 AFT circuit Expired JPS6019846B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52133948A JPS6019846B2 (en) 1977-11-08 1977-11-08 AFT circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52133948A JPS6019846B2 (en) 1977-11-08 1977-11-08 AFT circuit

Publications (2)

Publication Number Publication Date
JPS5467309A true JPS5467309A (en) 1979-05-30
JPS6019846B2 JPS6019846B2 (en) 1985-05-18

Family

ID=15116802

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52133948A Expired JPS6019846B2 (en) 1977-11-08 1977-11-08 AFT circuit

Country Status (1)

Country Link
JP (1) JPS6019846B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63256010A (en) * 1987-04-14 1988-10-24 Nippon Telegr & Teleph Corp <Ntt> Mobile radio equipment having frequency stabilizing function

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0254957U (en) * 1988-10-13 1990-04-20

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63256010A (en) * 1987-04-14 1988-10-24 Nippon Telegr & Teleph Corp <Ntt> Mobile radio equipment having frequency stabilizing function

Also Published As

Publication number Publication date
JPS6019846B2 (en) 1985-05-18

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