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JPS5772405A - Frequency demodulating circuit - Google Patents

Frequency demodulating circuit

Info

Publication number
JPS5772405A
JPS5772405A JP14900680A JP14900680A JPS5772405A JP S5772405 A JPS5772405 A JP S5772405A JP 14900680 A JP14900680 A JP 14900680A JP 14900680 A JP14900680 A JP 14900680A JP S5772405 A JPS5772405 A JP S5772405A
Authority
JP
Japan
Prior art keywords
signal
circuit
frequency
pulse
input terminal
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
JP14900680A
Other languages
Japanese (ja)
Inventor
Toshio Abiko
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP14900680A priority Critical patent/JPS5772405A/en
Publication of JPS5772405A publication Critical patent/JPS5772405A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE:To demodulate a frequency with a simple constitution and without adjustment, by operating AND between a signal which is obtained by delaying the signal, and the original signal and by integrating the output. CONSTITUTION:The signal from an intermediate frequency amplifying circuit is inputted to one input terminal of an AND circuit G1 through a delay circuit 10. The signal is inputted directly to the other input terminal. The duty ratio of the pulse in the output of the AND circuit G1 is low if the frequency of the signal is high, but a pulse of a high duty ratio is outputted if the frequency of the signal is low. This pulse is integrated by an integral network 11 to obtain a demodulation signal. A circuit such as an NAND circuit to satisfy conditions of the product can be used instead of the AND circuit G1.
JP14900680A 1980-10-23 1980-10-23 Frequency demodulating circuit Pending JPS5772405A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14900680A JPS5772405A (en) 1980-10-23 1980-10-23 Frequency demodulating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14900680A JPS5772405A (en) 1980-10-23 1980-10-23 Frequency demodulating circuit

Publications (1)

Publication Number Publication Date
JPS5772405A true JPS5772405A (en) 1982-05-06

Family

ID=15465599

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14900680A Pending JPS5772405A (en) 1980-10-23 1980-10-23 Frequency demodulating circuit

Country Status (1)

Country Link
JP (1) JPS5772405A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4608538A (en) * 1983-12-07 1986-08-26 Anderson Scientific FM quadrature detector with ferrite bead tuned circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4608538A (en) * 1983-12-07 1986-08-26 Anderson Scientific FM quadrature detector with ferrite bead tuned circuit

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