[go: up one dir, main page]

JPS5754407A - Frequency demodulation circuit - Google Patents

Frequency demodulation circuit

Info

Publication number
JPS5754407A
JPS5754407A JP12950780A JP12950780A JPS5754407A JP S5754407 A JPS5754407 A JP S5754407A JP 12950780 A JP12950780 A JP 12950780A JP 12950780 A JP12950780 A JP 12950780A JP S5754407 A JPS5754407 A JP S5754407A
Authority
JP
Japan
Prior art keywords
signal
output
frequency band
counter
good accuracy
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
JP12950780A
Other languages
Japanese (ja)
Inventor
Shoichi Abe
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 JP12950780A priority Critical patent/JPS5754407A/en
Publication of JPS5754407A publication Critical patent/JPS5754407A/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)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE:To perform demodulation at low frequency band with good accuracy, by converting the signal width of a signal modulated at a comparatively lower frequency band through digital-count into a type of information. CONSTITUTION:After an AC signal I is inputted and half-wave-amplified A, the result is converted B into a logical level. An output J is applied to an AND gate D with a pulse K of a generator C, and an output L advances a binary counter E. A delay gate pulse M is produced F by a signal J to stop the advancement of the counter E, and a register G latches this counter information for D/A conversion H, then an output of voltage change due to frequency change in the AC signal is obtained, allowing to made demodulation at a lower frequency band with good accuracy.
JP12950780A 1980-09-18 1980-09-18 Frequency demodulation circuit Pending JPS5754407A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12950780A JPS5754407A (en) 1980-09-18 1980-09-18 Frequency demodulation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12950780A JPS5754407A (en) 1980-09-18 1980-09-18 Frequency demodulation circuit

Publications (1)

Publication Number Publication Date
JPS5754407A true JPS5754407A (en) 1982-03-31

Family

ID=15011191

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12950780A Pending JPS5754407A (en) 1980-09-18 1980-09-18 Frequency demodulation circuit

Country Status (1)

Country Link
JP (1) JPS5754407A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6057727A (en) * 1983-08-08 1985-04-03 アールシーエー　トムソン　ライセンシング　コーポレーシヨン Device for demodulating angle modulated signal and converting analog to digital
JPS61192103A (en) * 1985-02-20 1986-08-26 Matsushita Electric Ind Co Ltd Digital fm demodulator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6057727A (en) * 1983-08-08 1985-04-03 アールシーエー　トムソン　ライセンシング　コーポレーシヨン Device for demodulating angle modulated signal and converting analog to digital
JPH0588571B2 (en) * 1983-08-08 1993-12-22 Aaru Shii Ee Tomuson Raisenshingu Corp
JPS61192103A (en) * 1985-02-20 1986-08-26 Matsushita Electric Ind Co Ltd Digital fm demodulator

Similar Documents

Publication Publication Date Title
Hejhal Classification theory for Hardy classes of analytic functions
JPS5754407A (en) Frequency demodulation circuit
NL7801175A (en) INVERTER.
JPS5749866A (en) Analog-digital converter and digital voltmeter
JPS5571368A (en) Data sampling system
JPS52120662A (en) Pulse generator circuit
JPS5669929A (en) Pulse-width modulating circuit
JPS56169418A (en) Frequency multiplying circuit for digital signal
JPS6437124A (en) Pulse width modulating signal generator
JPS5544212A (en) Timing circuit
JPS5613814A (en) Automatic frequency control device
JPS57199318A (en) High-speed bipolar data latch circuit
JPS57162520A (en) A/d converting system
JPS5753153A (en) Pulse frequency converter
JPS5624850A (en) Signal quality detecting circuit
JPS5415625A (en) Reference generator circuit for emitter-coupled transistor logic circuit
JPS5582576A (en) Data pick up method
JPS56158532A (en) Waveform generator
JPS5288730A (en) Inverter control circuit
JPS5384294A (en) Digital division type indexing device
JPS5377164A (en) Counter type decoder
JPS5794915A (en) Demodulating circuit
JPS5686361A (en) Frequency-voltage converter
JPS5370615A (en) Frequency converter
JPS56149827A (en) 90 phase difference signal generating circuit