JPS5772417A - Frequency control receiver - Google Patents

Frequency control receiver

Info

Publication number
JPS5772417A
JPS5772417A JP14960280A JP14960280A JPS5772417A JP S5772417 A JPS5772417 A JP S5772417A JP 14960280 A JP14960280 A JP 14960280A JP 14960280 A JP14960280 A JP 14960280A JP S5772417 A JPS5772417 A JP S5772417A
Authority
JP
Japan
Prior art keywords
frequency
voltage
control amplifier
voltage control
proportional
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
JP14960280A
Other languages
Japanese (ja)
Inventor
Masaaki Maekawa
Susumu Genban
Koichi Nakano
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP14960280A priority Critical patent/JPS5772417A/en
Publication of JPS5772417A publication Critical patent/JPS5772417A/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
    • H03J7/08—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 varactors, i.e. voltage variable reactive diodes
    • H03J7/10—Modification of automatic frequency control sensitivity or linearising automatic frequency control operation

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To facilitate optimum tuning, by controlling a voltage control amplifier, which is connected to an AFC circuit, by a DC voltage proportional to a local oscillation frequency. CONSTITUTION:A voltage control amplifier 8 is connected to a low-pass filter 7 which takes out a DC voltage proportional to a detuning frequency, and the output of this voltage control amplifier 8 is led to a local oscillating circuit3. A frequency- voltage converter 9 is connected between the local oscillating circuit 3 and the voltage control amplifier 8, and the degree of amplification of the voltage control amplifier 8 is controlled by a DC voltage proportional to the local oscillation frequency. That is, the gain of the voltage control amplifier 8 is changed in accordance with a receiving frequency to make the control range of the frequency control constant when the receiving frequency is any of frequencies between the upper limit and the lower limit.
JP14960280A 1980-10-22 1980-10-22 Frequency control receiver Pending JPS5772417A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14960280A JPS5772417A (en) 1980-10-22 1980-10-22 Frequency control receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14960280A JPS5772417A (en) 1980-10-22 1980-10-22 Frequency control receiver

Publications (1)

Publication Number Publication Date
JPS5772417A true JPS5772417A (en) 1982-05-06

Family

ID=15478785

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14960280A Pending JPS5772417A (en) 1980-10-22 1980-10-22 Frequency control receiver

Country Status (1)

Country Link
JP (1) JPS5772417A (en)

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