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JPS55136707A - Fm demodulation circuit - Google Patents

Fm demodulation circuit

Info

Publication number
JPS55136707A
JPS55136707A JP4390379A JP4390379A JPS55136707A JP S55136707 A JPS55136707 A JP S55136707A JP 4390379 A JP4390379 A JP 4390379A JP 4390379 A JP4390379 A JP 4390379A JP S55136707 A JPS55136707 A JP S55136707A
Authority
JP
Japan
Prior art keywords
circuit
intermediate frequency
phase
frequency signal
solidstate
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
JP4390379A
Other languages
Japanese (ja)
Inventor
Yamato Okashin
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 JP4390379A priority Critical patent/JPS55136707A/en
Publication of JPS55136707A publication Critical patent/JPS55136707A/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
    • H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
    • H03D3/22—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by means of active elements with more than two electrodes to which two signals are applied derived from the signal to be demodulated and having a phase difference related to the frequency deviation, e.g. phase detector

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

PURPOSE:To establish the FM demodulation circuit easy for circuit integration and unnecessary for adjustment, by using the bridge circuit consisting of the solidstate resonator and three resistors for the phase shift circuit. CONSTITUTION:The emitter follower operated TRsQ1, Q2 connected to the transistors TRQ3, Q4 for constant current source receive the intermediate frequency signal from the FM intermediate frequency amplifier 1 in opposite phase, and these signals are fed to the bridge circuit 2 consisting of the solidstate oscillator X and the resistors R1-R3 resonated to the intermediate frequency. The circuit 2 phase-shifts this intermediate frequency signal in proportion to the frequency of the intermediate frequency signal in FM modulation. The signals phase-shifted and not shifted are fed to the double balance type multiplication circuit 3 consisting of TRsQ11-Q17 for FM demodulation and inputted to the filter circuit 4 via the circuit consisting of TRsQ21-Q26 constituting the current mirror circuits of a plurality.
JP4390379A 1979-04-11 1979-04-11 Fm demodulation circuit Pending JPS55136707A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4390379A JPS55136707A (en) 1979-04-11 1979-04-11 Fm demodulation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4390379A JPS55136707A (en) 1979-04-11 1979-04-11 Fm demodulation circuit

Publications (1)

Publication Number Publication Date
JPS55136707A true JPS55136707A (en) 1980-10-24

Family

ID=12676663

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4390379A Pending JPS55136707A (en) 1979-04-11 1979-04-11 Fm demodulation circuit

Country Status (1)

Country Link
JP (1) JPS55136707A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60120606A (en) * 1983-12-05 1985-06-28 Hitachi Ltd amplifier circuit
JPS62245707A (en) * 1986-04-17 1987-10-27 Rohm Co Ltd Fm demodulation circuit
JPS62292005A (en) * 1986-06-11 1987-12-18 Matsushita Electric Ind Co Ltd Fm demodulation circuit
JPH0470102A (en) * 1990-07-10 1992-03-05 Toshiba Corp Fm demodulation circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60120606A (en) * 1983-12-05 1985-06-28 Hitachi Ltd amplifier circuit
JPS62245707A (en) * 1986-04-17 1987-10-27 Rohm Co Ltd Fm demodulation circuit
JPS62292005A (en) * 1986-06-11 1987-12-18 Matsushita Electric Ind Co Ltd Fm demodulation circuit
JPH0470102A (en) * 1990-07-10 1992-03-05 Toshiba Corp Fm demodulation circuit

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