JPS5583361A - Fm demodulator circuit - Google Patents

Fm demodulator circuit

Info

Publication number
JPS5583361A
JPS5583361A JP15964278A JP15964278A JPS5583361A JP S5583361 A JPS5583361 A JP S5583361A JP 15964278 A JP15964278 A JP 15964278A JP 15964278 A JP15964278 A JP 15964278A JP S5583361 A JPS5583361 A JP S5583361A
Authority
JP
Japan
Prior art keywords
detector
capacitor
switch
tuning frequency
demodulator circuit
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
JP15964278A
Other languages
Japanese (ja)
Inventor
Takaharu Shirato
Sadao Suzuki
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 JP15964278A priority Critical patent/JPS5583361A/en
Publication of JPS5583361A publication Critical patent/JPS5583361A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Television Receiver Circuits (AREA)
  • Stereo-Broadcasting Methods (AREA)

Abstract

PURPOSE:To make it possible to perform a process by a single demodulator circuit system by connecting a capacitor in parallel to another tuning capacitor of a detector via a switch and then by changing the tuning frequency of an FM detector over to a lower tuning frequency. CONSTITUTION:Band-pass filter 13 supplies a multiple signal of two FM-modulated signals, for example, by a beat signal obtained by an inter-carrier system from video detector 1. Then, FM demodulator 14 includes a limiter and FM detector, capacitor 15 is connected via switch 16 in parallel to tuning capacitor C of the FM detector, and the tuning frequency of the FM detector is switched to a lower tuning frequency by adding this capacitor 15. Then, switch 16 is changed over by the output signal of oscillator 19 together with switch 18 to be switched between terminals 9 and 5. Therefore, the multiple signal consisting of FM-modulated signals with different carrier frequencies can be processed by a single demodulator circuit of simple constitution.
JP15964278A 1978-12-20 1978-12-20 Fm demodulator circuit Pending JPS5583361A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15964278A JPS5583361A (en) 1978-12-20 1978-12-20 Fm demodulator circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15964278A JPS5583361A (en) 1978-12-20 1978-12-20 Fm demodulator circuit

Publications (1)

Publication Number Publication Date
JPS5583361A true JPS5583361A (en) 1980-06-23

Family

ID=15698165

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15964278A Pending JPS5583361A (en) 1978-12-20 1978-12-20 Fm demodulator circuit

Country Status (1)

Country Link
JP (1) JPS5583361A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5930381A (en) * 1982-08-11 1984-02-17 Victor Co Of Japan Ltd Sound circuit of television receiver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5930381A (en) * 1982-08-11 1984-02-17 Victor Co Of Japan Ltd Sound circuit of television receiver

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