JPS56100529A - Receiving device - Google Patents

Receiving device

Info

Publication number
JPS56100529A
JPS56100529A JP232480A JP232480A JPS56100529A JP S56100529 A JPS56100529 A JP S56100529A JP 232480 A JP232480 A JP 232480A JP 232480 A JP232480 A JP 232480A JP S56100529 A JPS56100529 A JP S56100529A
Authority
JP
Japan
Prior art keywords
frequency
control
tuning
signal
perform
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
JP232480A
Other languages
Japanese (ja)
Other versions
JPS6059767B2 (en
Inventor
Minoru Ogita
Shigenobu Kimura
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.)
Nippon Gakki Co Ltd
Original Assignee
Nippon Gakki 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 Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Priority to JP232480A priority Critical patent/JPS6059767B2/en
Priority to US06/195,474 priority patent/US4344187A/en
Publication of JPS56100529A publication Critical patent/JPS56100529A/en
Publication of JPS6059767B2 publication Critical patent/JPS6059767B2/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
    • H03J7/06—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 using counters or frequency dividers
    • H03J7/065—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 using counters or frequency dividers the counter or frequency divider being used in a phase locked loop

Landscapes

  • Superheterodyne Receivers (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To perform preset channel selection due to digital control of frequency division ratio N or holding of tuning due to AFC, by incorporating or separating the local oscillator into or from the PLL. CONSTITUTION:When the tuning state is good and muting control signal Sm becomes 1, the tuning frequency is changed according to change of the local oscillation frequency by control voltage Vc to perform frequency control. Since muting control signal Sm becomes 0 when the tuning state is not good, the signal corresponding to the local oscillation frequency and the reference signal of a prescribed frequency are compared in phase by 23, and the variable frequency oscillator is controlled by the comparison signal to perform the control for the phase locked loop.
JP232480A 1979-10-18 1980-01-12 receiving device Expired JPS6059767B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP232480A JPS6059767B2 (en) 1980-01-12 1980-01-12 receiving device
US06/195,474 US4344187A (en) 1979-10-18 1980-10-09 Radio receiver with system for maintaining optimum tuning

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP232480A JPS6059767B2 (en) 1980-01-12 1980-01-12 receiving device

Publications (2)

Publication Number Publication Date
JPS56100529A true JPS56100529A (en) 1981-08-12
JPS6059767B2 JPS6059767B2 (en) 1985-12-26

Family

ID=11526130

Family Applications (1)

Application Number Title Priority Date Filing Date
JP232480A Expired JPS6059767B2 (en) 1979-10-18 1980-01-12 receiving device

Country Status (1)

Country Link
JP (1) JPS6059767B2 (en)

Also Published As

Publication number Publication date
JPS6059767B2 (en) 1985-12-26

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