JPS5255415A - Anti-side tone circuit - Google Patents

Anti-side tone circuit

Info

Publication number
JPS5255415A
JPS5255415A JP13112175A JP13112175A JPS5255415A JP S5255415 A JPS5255415 A JP S5255415A JP 13112175 A JP13112175 A JP 13112175A JP 13112175 A JP13112175 A JP 13112175A JP S5255415 A JPS5255415 A JP S5255415A
Authority
JP
Japan
Prior art keywords
input terminal
reception signal
side tone
amplifier
tone circuit
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.)
Granted
Application number
JP13112175A
Other languages
Japanese (ja)
Other versions
JPS5426446B2 (en
Inventor
Koichi Ooyama
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.)
Iwatsu Electric Co Ltd
Iwasaki Tsushinki KK
Original Assignee
Iwatsu Electric Co Ltd
Iwasaki Tsushinki KK
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 Iwatsu Electric Co Ltd, Iwasaki Tsushinki KK filed Critical Iwatsu Electric Co Ltd
Priority to JP13112175A priority Critical patent/JPS5255415A/en
Publication of JPS5255415A publication Critical patent/JPS5255415A/en
Publication of JPS5426446B2 publication Critical patent/JPS5426446B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/58—Anti-side-tone circuits
    • H04M1/585—Anti-side-tone circuits implemented without inductive element

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:The impedance inserted into output terminal of arithmetic amplifier, inversion input terminal, earth, and transmission signal input terminal respectively is adjusted. In this way, the gain is increased when reception signal is transmitted to reception signal detection circuit. At the same time, application is successfully ensured for the telephone circuit inculuding amplifier.
JP13112175A 1975-10-31 1975-10-31 Anti-side tone circuit Granted JPS5255415A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13112175A JPS5255415A (en) 1975-10-31 1975-10-31 Anti-side tone circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13112175A JPS5255415A (en) 1975-10-31 1975-10-31 Anti-side tone circuit

Publications (2)

Publication Number Publication Date
JPS5255415A true JPS5255415A (en) 1977-05-06
JPS5426446B2 JPS5426446B2 (en) 1979-09-04

Family

ID=15050466

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13112175A Granted JPS5255415A (en) 1975-10-31 1975-10-31 Anti-side tone circuit

Country Status (1)

Country Link
JP (1) JPS5255415A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57109450A (en) * 1980-12-26 1982-07-07 Masao Uchiumi Howling preventing circuit for telephone set callable by loudspeaker
US4414432A (en) * 1981-09-21 1983-11-08 Zenith Radio Corporation Pseudo-full duplex television/telephone loudspeaker system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57109450A (en) * 1980-12-26 1982-07-07 Masao Uchiumi Howling preventing circuit for telephone set callable by loudspeaker
US4414432A (en) * 1981-09-21 1983-11-08 Zenith Radio Corporation Pseudo-full duplex television/telephone loudspeaker system

Also Published As

Publication number Publication date
JPS5426446B2 (en) 1979-09-04

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