JPS5726905A - Fm demodulation circuit - Google Patents

Fm demodulation circuit

Info

Publication number
JPS5726905A
JPS5726905A JP10276780A JP10276780A JPS5726905A JP S5726905 A JPS5726905 A JP S5726905A JP 10276780 A JP10276780 A JP 10276780A JP 10276780 A JP10276780 A JP 10276780A JP S5726905 A JPS5726905 A JP S5726905A
Authority
JP
Japan
Prior art keywords
resonator
phase shifter
terminal
coil
damping resistor
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
JP10276780A
Other languages
Japanese (ja)
Inventor
Kimio Seike
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.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
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 Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to JP10276780A priority Critical patent/JPS5726905A/en
Publication of JPS5726905A publication Critical patent/JPS5726905A/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
    • H03D3/06—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by combining signals additively or in product demodulators
    • H03D3/16—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by combining signals additively or in product demodulators by means of electromechanical resonators

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Oscillators With Electromechanical Resonators (AREA)

Abstract

PURPOSE:To achieve adjustment-free phase shifter, by using a two-terminal type piezoelectric resonator as a tank circuit for the phase shifter and combining an impedance fixed coil and a damping resistor for the piezoelectric resonator. CONSTITUTION:A two-terminal type ceramic resonator 12 is connected in series with a coil L0 between an output terminal 13 of a phase shifter 11 and a common potential terminal 15 and a damping resistor R0 is connected in parallel with the two-terminal type ceramic resonator 12. A phase leading capacitor C0 is connected between an input terminal 14 of the phase shifter 11 and the output terminal 13. With the capacitor C0, the phase of a signal inputted from a limiter amplifier 1 to the phase shifter 11 is shifted by 90 deg., the antiresonance impedance of the resonator is damped with a damping resistor R0, the series resonance frequency of the resonator 12 is expanded toward lower band with the coil L0, and required FM demodulation characteristics can be obtained.
JP10276780A 1980-07-25 1980-07-25 Fm demodulation circuit Pending JPS5726905A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10276780A JPS5726905A (en) 1980-07-25 1980-07-25 Fm demodulation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10276780A JPS5726905A (en) 1980-07-25 1980-07-25 Fm demodulation circuit

Publications (1)

Publication Number Publication Date
JPS5726905A true JPS5726905A (en) 1982-02-13

Family

ID=14336322

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10276780A Pending JPS5726905A (en) 1980-07-25 1980-07-25 Fm demodulation circuit

Country Status (1)

Country Link
JP (1) JPS5726905A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4490680A (en) * 1981-04-27 1984-12-25 Tokyo Shibaura Denki Kabushiki Kaisha Integrable quadrature FM demodulator using fewer signal pins
WO2004023642A1 (en) * 2002-08-30 2004-03-18 Niigata Seimitsu Co., Ltd. Receiver and its adjustment system and method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53108267A (en) * 1977-03-03 1978-09-20 Noto Denshi Kogyo Kk Quadrature fm detector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53108267A (en) * 1977-03-03 1978-09-20 Noto Denshi Kogyo Kk Quadrature fm detector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4490680A (en) * 1981-04-27 1984-12-25 Tokyo Shibaura Denki Kabushiki Kaisha Integrable quadrature FM demodulator using fewer signal pins
WO2004023642A1 (en) * 2002-08-30 2004-03-18 Niigata Seimitsu Co., Ltd. Receiver and its adjustment system and method

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