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JPS5691523A - Frequency-modulating receiver of superheterodyne system - Google Patents

Frequency-modulating receiver of superheterodyne system

Info

Publication number
JPS5691523A
JPS5691523A JP17097579A JP17097579A JPS5691523A JP S5691523 A JPS5691523 A JP S5691523A JP 17097579 A JP17097579 A JP 17097579A JP 17097579 A JP17097579 A JP 17097579A JP S5691523 A JPS5691523 A JP S5691523A
Authority
JP
Japan
Prior art keywords
voltage
frequency
varicap
make
receiver
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
JP17097579A
Other languages
Japanese (ja)
Other versions
JPS6031406B2 (en
Inventor
Yoshimori Uchida
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 JP17097579A priority Critical patent/JPS6031406B2/en
Publication of JPS5691523A publication Critical patent/JPS5691523A/en
Publication of JPS6031406B2 publication Critical patent/JPS6031406B2/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
    • H03J7/08—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

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To make it possible to set a lock width freely without lowering selectivity, by supplying the output of an amplifier, amplifying an AFC signal, to a local oscillating circuit via a resistance voltage divider. CONSTITUTION:Resistors 17 and 30, when a voltage applied to the cathode side of varicap 18 in local oscillating circuit 21 is VB, generate VB=[R30/(R17+R30)] (VA-VS)+VS, where VA is the output voltage of differential amplifying circuit 15 and VS is the voltage of power source 16. Therefore, even if the output voltage of differential amplifying circuit 15 is at any level, the resistance value of resistor 17 or 30 is set adequately to make it possible to set the voltage applied to varicap 18 within a desired variable range of voltages, so that the design of the receiver will be facilitated.
JP17097579A 1979-12-26 1979-12-26 Super-heterodyne frequency modulation receiver Expired JPS6031406B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17097579A JPS6031406B2 (en) 1979-12-26 1979-12-26 Super-heterodyne frequency modulation receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17097579A JPS6031406B2 (en) 1979-12-26 1979-12-26 Super-heterodyne frequency modulation receiver

Publications (2)

Publication Number Publication Date
JPS5691523A true JPS5691523A (en) 1981-07-24
JPS6031406B2 JPS6031406B2 (en) 1985-07-22

Family

ID=15914816

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17097579A Expired JPS6031406B2 (en) 1979-12-26 1979-12-26 Super-heterodyne frequency modulation receiver

Country Status (1)

Country Link
JP (1) JPS6031406B2 (en)

Also Published As

Publication number Publication date
JPS6031406B2 (en) 1985-07-22

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