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JPS5634203A - Fm demodulator - Google Patents

Fm demodulator

Info

Publication number
JPS5634203A
JPS5634203A JP11057179A JP11057179A JPS5634203A JP S5634203 A JPS5634203 A JP S5634203A JP 11057179 A JP11057179 A JP 11057179A JP 11057179 A JP11057179 A JP 11057179A JP S5634203 A JPS5634203 A JP S5634203A
Authority
JP
Japan
Prior art keywords
terminal
output
amplifier
low
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.)
Granted
Application number
JP11057179A
Other languages
Japanese (ja)
Other versions
JPS643084B2 (en
Inventor
Masami Miura
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP11057179A priority Critical patent/JPS5634203A/en
Priority to US06/181,930 priority patent/US4339726A/en
Priority to GB8027794A priority patent/GB2060291B/en
Priority to DE3032660A priority patent/DE3032660C2/en
Priority to DE3050934A priority patent/DE3050934C2/en
Publication of JPS5634203A publication Critical patent/JPS5634203A/en
Publication of JPS643084B2 publication Critical patent/JPS643084B2/ja
Granted 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B2200/00—Indexing scheme relating to details of oscillators covered by H03B
    • H03B2200/006—Functional aspects of oscillators
    • H03B2200/0082—Lowering the supply voltage and saving power
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D13/00—Circuits for comparing the phase or frequency of two mutually-independent oscillations
    • H03D13/003—Circuits for comparing the phase or frequency of two mutually-independent oscillations in which both oscillations are converted by logic means into pulses which are applied to filtering or integrating means
    • H03D13/004—Circuits for comparing the phase or frequency of two mutually-independent oscillations in which both oscillations are converted by logic means into pulses which are applied to filtering or integrating means the logic means delivering pulses at more than one terminal, e.g. up and down pulses
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0001—Circuit elements of demodulators
    • H03D2200/0009—Emitter or source coupled transistor pairs or long tail pairs
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0041—Functional aspects of demodulators
    • H03D2200/0082—Quadrature arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

PURPOSE:To obtain an FM detecting system where performance is hardly lowered even for the low-voltage power source of 3V or less, by constituting a demodulator by an FM intermediate frequency signal amplifier, a phase shift circuit, an OR circuit, a low-pass filter, a low-frequency amplifier, and so on. CONSTITUTION:The FM intermediate frequency signal from terminal T is applied to amplifier 21 to obtain an in-phase output and an inversion output where phases are inverted for each other, and one of these outputs is supplied to phase shift circuit 22 through terminal (u) and has the phase shifted by a prescribed quantity and is applied to OR circuits 23 and 24 through terminal (v) and the L point, and the output to terminal (u) is branched and is applied to OR circuit 23 directly through the M point. The other output of amplifier 21 is supplied to OR circuit 24 directly through the N point, and outputs of circuits 23 and 24 are applied to LPF25, 26 through P and Q points respectively. After that, these outputs are applied to low-frequency amplifier 27 through R and S points and are taken out as the FM demodulation output from terminal (o).
JP11057179A 1979-08-29 1979-08-29 Fm demodulator Granted JPS5634203A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP11057179A JPS5634203A (en) 1979-08-29 1979-08-29 Fm demodulator
US06/181,930 US4339726A (en) 1979-08-29 1980-08-27 Demodulator of angle modulated signal operable by low power voltage
GB8027794A GB2060291B (en) 1979-08-29 1980-08-28 Angle demodulators
DE3032660A DE3032660C2 (en) 1979-08-29 1980-08-29 Demodulator circuit for demodulating an angle-modulated input signal
DE3050934A DE3050934C2 (en) 1979-08-29 1980-08-29 Demodulator circuit for demodulating an angle-modulated input signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11057179A JPS5634203A (en) 1979-08-29 1979-08-29 Fm demodulator

Publications (2)

Publication Number Publication Date
JPS5634203A true JPS5634203A (en) 1981-04-06
JPS643084B2 JPS643084B2 (en) 1989-01-19

Family

ID=14539200

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11057179A Granted JPS5634203A (en) 1979-08-29 1979-08-29 Fm demodulator

Country Status (1)

Country Link
JP (1) JPS5634203A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59161414A (en) * 1983-03-04 1984-09-12 Teikoku Chem Ind Corp Ltd Preparation of antibacterial resin
JPS6031759A (en) * 1983-08-01 1985-02-18 帝人株式会社 Deodorising padding
JPH01319403A (en) * 1988-06-21 1989-12-25 Yuho Chem Kk Germicide composition
US6416546B1 (en) 1997-06-04 2002-07-09 Unitika Ltd. Medical device and production method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53125751A (en) * 1977-04-08 1978-11-02 Toshiba Corp Fm detection circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53125751A (en) * 1977-04-08 1978-11-02 Toshiba Corp Fm detection circuit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59161414A (en) * 1983-03-04 1984-09-12 Teikoku Chem Ind Corp Ltd Preparation of antibacterial resin
JPS6031759A (en) * 1983-08-01 1985-02-18 帝人株式会社 Deodorising padding
JPS6122978B2 (en) * 1983-08-01 1986-06-03 Teijin Ltd
JPH01319403A (en) * 1988-06-21 1989-12-25 Yuho Chem Kk Germicide composition
US6416546B1 (en) 1997-06-04 2002-07-09 Unitika Ltd. Medical device and production method thereof

Also Published As

Publication number Publication date
JPS643084B2 (en) 1989-01-19

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