JPS5669905A - Fm demodulator - Google Patents

Fm demodulator

Info

Publication number
JPS5669905A
JPS5669905A JP14604779A JP14604779A JPS5669905A JP S5669905 A JPS5669905 A JP S5669905A JP 14604779 A JP14604779 A JP 14604779A JP 14604779 A JP14604779 A JP 14604779A JP S5669905 A JPS5669905 A JP S5669905A
Authority
JP
Japan
Prior art keywords
pulse
carrier
circuit
output
cycles
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
JP14604779A
Other languages
Japanese (ja)
Inventor
Shiro Nakagawa
Kazuo Takahashi
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.)
TDK Corp
Original Assignee
TDK 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 TDK Corp filed Critical TDK Corp
Priority to JP14604779A priority Critical patent/JPS5669905A/en
Publication of JPS5669905A publication Critical patent/JPS5669905A/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 obtain an excellent-S/N output by eliminating a carrier component even when the frequency of the carrier is low, by converting the period of a pulse string into a voltage and then by sampling and holding it at cycles of the carrier. CONSTITUTION:An FM signal applied to input terminal 7, after having an ampplitude-varying component eliminated by limiter 8, is converted into a pulse string constant in pulse width through differentiating circuit 9 and pulse waveform shaping circuit 10. This pulse string is supplied to differentiating circuit 11, which converts variations in cycles of the pulse string into the level shift extent, i.e. variations in voltage. The output of limiter 8, on the other hand, is converted by sampling pulse generating circuit 12 into sampling pulses of the same cycles with the carrier and they are applied to sample holding circuit 13. Sample holding circuit 13 samples the level shift extent to output a staircase wave.
JP14604779A 1979-11-13 1979-11-13 Fm demodulator Pending JPS5669905A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14604779A JPS5669905A (en) 1979-11-13 1979-11-13 Fm demodulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14604779A JPS5669905A (en) 1979-11-13 1979-11-13 Fm demodulator

Publications (1)

Publication Number Publication Date
JPS5669905A true JPS5669905A (en) 1981-06-11

Family

ID=15398893

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14604779A Pending JPS5669905A (en) 1979-11-13 1979-11-13 Fm demodulator

Country Status (1)

Country Link
JP (1) JPS5669905A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100412036B1 (en) * 2003-04-04 2003-12-18 Kwang Yong Kim Oil-water separation tank

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100412036B1 (en) * 2003-04-04 2003-12-18 Kwang Yong Kim Oil-water separation tank

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