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JPS54141551A - Demodulation circuit for frequency modulation wave - Google Patents

Demodulation circuit for frequency modulation wave

Info

Publication number
JPS54141551A
JPS54141551A JP4953378A JP4953378A JPS54141551A JP S54141551 A JPS54141551 A JP S54141551A JP 4953378 A JP4953378 A JP 4953378A JP 4953378 A JP4953378 A JP 4953378A JP S54141551 A JPS54141551 A JP S54141551A
Authority
JP
Japan
Prior art keywords
circuit
sample hold
saw tooth
pulse
output
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
JP4953378A
Other languages
Japanese (ja)
Inventor
Yutaka Ueno
Shuji Iwata
Fumitaka Ono
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP4953378A priority Critical patent/JPS54141551A/en
Publication of JPS54141551A publication Critical patent/JPS54141551A/en
Pending legal-status Critical Current

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  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE: To establish the circuit in which the reproduction of carrier is not required and the circuit size is not changed so much independently of the frequency of carrier.
CONSTITUTION: After the reception frequency modulation wave from the input terminal 1 is converted into pulse series train at the zero cross detector 20 consisting of the limiter 10, first differentiation circuit 11, inverter 12, second differentiation circuit and OR circuit 14, it is fed to the delay unit 15 and the sample hold unit 17. The saw tooth wave generator 16 is reset with the output of the delay unit 15. The level of the saw tooth signal is increased in proportion to the pulse distance of pulse series train. The output of the saw tooth wave generator 16 is held until the next pulse is coming at the sample hold unit 17. The signal waveform is obtained by passing through the output signal of sample hold for the low pass filter 18.
COPYRIGHT: (C)1979,JPO&Japio
JP4953378A 1978-04-25 1978-04-25 Demodulation circuit for frequency modulation wave Pending JPS54141551A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4953378A JPS54141551A (en) 1978-04-25 1978-04-25 Demodulation circuit for frequency modulation wave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4953378A JPS54141551A (en) 1978-04-25 1978-04-25 Demodulation circuit for frequency modulation wave

Publications (1)

Publication Number Publication Date
JPS54141551A true JPS54141551A (en) 1979-11-02

Family

ID=12833790

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4953378A Pending JPS54141551A (en) 1978-04-25 1978-04-25 Demodulation circuit for frequency modulation wave

Country Status (1)

Country Link
JP (1) JPS54141551A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4510453A (en) * 1982-07-13 1985-04-09 Westinghouse Electric Corp. Frequency modulation or pulse modulation demodulator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4510453A (en) * 1982-07-13 1985-04-09 Westinghouse Electric Corp. Frequency modulation or pulse modulation demodulator

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