JPS56128013A - Synthesizer receiver - Google Patents

Synthesizer receiver

Info

Publication number
JPS56128013A
JPS56128013A JP3102080A JP3102080A JPS56128013A JP S56128013 A JPS56128013 A JP S56128013A JP 3102080 A JP3102080 A JP 3102080A JP 3102080 A JP3102080 A JP 3102080A JP S56128013 A JPS56128013 A JP S56128013A
Authority
JP
Japan
Prior art keywords
circuit
frequency
voltage
aft
local
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
JP3102080A
Other languages
Japanese (ja)
Inventor
Tadao Sasaki
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 JP3102080A priority Critical patent/JPS56128013A/en
Publication of JPS56128013A publication Critical patent/JPS56128013A/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
    • H03J7/02—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

Abstract

PURPOSE:To prevent leading-in of an adjacent channel by operating a PLL circuit, when the local oscillating frequency has deviated over the allowable width in the course of holding a channel selection state by the AFT circuit. CONSTITUTION:A local oscillation signal of the tuner 1 is provided to the phase comparator circuit 13 through the frequency dividing circuit 12, and it is compared with the reference frequency fr of the oscillating circuit 14. This comparison output Ep is converted to the channel selection voltage Ei through the integrating circuit 16. On the other hand, a signal of the intermediate frequency amplifier 2 is converted to the AFT voltage Ea, and is made the voltage Ei through the integrating circuit 16. When the AFT voltage Ea is varied and has led in an adjacent channel, deviation of the local oscillator frequency becomes large. In this case, the comparator circuit 13 operates the PLL20 by its output, and sets the local oscillating frequency to a normal value.
JP3102080A 1980-03-12 1980-03-12 Synthesizer receiver Pending JPS56128013A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3102080A JPS56128013A (en) 1980-03-12 1980-03-12 Synthesizer receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3102080A JPS56128013A (en) 1980-03-12 1980-03-12 Synthesizer receiver

Publications (1)

Publication Number Publication Date
JPS56128013A true JPS56128013A (en) 1981-10-07

Family

ID=12319831

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3102080A Pending JPS56128013A (en) 1980-03-12 1980-03-12 Synthesizer receiver

Country Status (1)

Country Link
JP (1) JPS56128013A (en)

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