JPS55143805A - Am frequency converter - Google Patents

Am frequency converter

Info

Publication number
JPS55143805A
JPS55143805A JP5147179A JP5147179A JPS55143805A JP S55143805 A JPS55143805 A JP S55143805A JP 5147179 A JP5147179 A JP 5147179A JP 5147179 A JP5147179 A JP 5147179A JP S55143805 A JPS55143805 A JP S55143805A
Authority
JP
Japan
Prior art keywords
output
terminal
comparator
input
carrier wave
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
JP5147179A
Other languages
Japanese (ja)
Inventor
Toshiyuki Hirose
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP5147179A priority Critical patent/JPS55143805A/en
Publication of JPS55143805A publication Critical patent/JPS55143805A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/02—Details
    • H03D1/06—Modifications of demodulators to reduce distortion, e.g. by negative feedback

Abstract

PURPOSE:To improve frequency stability without degradation of the characteristic by using an amplitude comparator and a carrier wave gain controller where the control input is connected to the difference components output of the comparator above through a base band amplifier. CONSTITUTION:The AM wave input applied to terminal 1 is detected by diode 14 connected to terminal 11 of amplitude comparator 9, and this detection output is compared with the AM wave comparison input applied to terminal 12 by differential amplifier 16, and the difference voltage between them is output to terminal 13. Since this output includes AM components. AM components are input to carrier wave gain control circuit 10 as the control input through base band amplifier 4. The output of carrier wave oscillator 6 is subjected to gain or attenuation according to the output voltge of amplifier 4 and becomes one input of comparator 9 to constitute a negative feedback circuit. Consequently, if a part of the output of controller 10 connected to comparator 9 is taken out from terminal 2, a good AM signal which is the almost same signal as the AM signal applied to terminal 1 and is not degraded and has the same frequency stability as oscillator 6 can be obtained.
JP5147179A 1979-04-27 1979-04-27 Am frequency converter Pending JPS55143805A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5147179A JPS55143805A (en) 1979-04-27 1979-04-27 Am frequency converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5147179A JPS55143805A (en) 1979-04-27 1979-04-27 Am frequency converter

Publications (1)

Publication Number Publication Date
JPS55143805A true JPS55143805A (en) 1980-11-10

Family

ID=12887854

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5147179A Pending JPS55143805A (en) 1979-04-27 1979-04-27 Am frequency converter

Country Status (1)

Country Link
JP (1) JPS55143805A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3736030A1 (en) * 1986-10-27 1988-05-05 Olympus Optical Co Endoscope

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3736030A1 (en) * 1986-10-27 1988-05-05 Olympus Optical Co Endoscope

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