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KR900702698A - Telephone circuit - Google Patents

Telephone circuit

Info

Publication number
KR900702698A
KR900702698A KR1019900701593A KR900701593A KR900702698A KR 900702698 A KR900702698 A KR 900702698A KR 1019900701593 A KR1019900701593 A KR 1019900701593A KR 900701593 A KR900701593 A KR 900701593A KR 900702698 A KR900702698 A KR 900702698A
Authority
KR
South Korea
Prior art keywords
signal
input
microphone
amplifier
loudspeaker
Prior art date
Application number
KR1019900701593A
Other languages
Korean (ko)
Inventor
죤 게이 마이클
Original Assignee
원본미기재
모토로라 인코포레이티드
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 원본미기재, 모토로라 인코포레이티드 filed Critical 원본미기재
Publication of KR900702698A publication Critical patent/KR900702698A/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M9/00Arrangements for interconnection not involving centralised switching
    • H04M9/08Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Telephone Function (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Abstract

내용 없음No content

Description

텔레폰 회로Telephone circuit

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

Claims (5)

텔레폰 회로에 있어서, 마이크로폰 입력 신호를 수신하기 위한 입력 및 출력을 가진 마이크로폰 증폭기를 포함하는 마이크로폰 신호 통로와, 확성기 출력 신호를 제공하기 위한 출력 및 입력을 가진 확성기 증폭기를 포함하는 확성기 신호 통로와, 확성이 증폭기의 입력에 결합된 출력 및 입력을 가진 가변 이득 스테이지와, 스피치 신호를 수신하고 전송하기 위한 가변 이득 스테이지 입력과 마이크로폰 신호 통로 사이에 결합된 스피치 회로망과, 마이크로폰 신호 통로에 결합된 제1입력과, 확성기 신호 통로 입력에 결합된 제2입력과, 마이크로폰 및 신호 통로에서의 신호 사이의 상관 관계에 따른 이득을 제어하기 위해 가변 이득 스테이지에 결합된 출력을 가지는 상관 관계기를 구비하는 것을 특징으로 하는 텔레폰 회로.A telephony circuit comprising: a microphone signal path including a microphone amplifier having an input and an output for receiving a microphone input signal, a loudspeaker signal path including a loudspeaker amplifier having an output and an input for providing a loudspeaker output signal, and amplification A variable gain stage having an output and an input coupled to the input of the amplifier, a speech network coupled between the variable gain stage input and a microphone signal path for receiving and transmitting speech signals, and a first input coupled to the microphone signal path And a correlator having a second input coupled to the loudspeaker signal path input and an output coupled to the variable gain stage for controlling the gain according to the correlation between the microphone and the signal in the signal path. Telephone circuit. 제1항에 있어서, 상관 관계기는, 상기 증폭기중의 한 증폭기에서의 신호를 나타내는 직각 관련 신호를 발생시키기 위한 수단과, 적신호를 발생시키기 위해, 직각 관련 신호에 상기 증폭기중의 나머지 증폭기에서의 신호를 승산하기 위한 승산 수단과, 가변 이득 스테이지의 이득을 제어하기 위한 제어 신호를 발생시키기 위해 상기 적신호를 처리하기 위한 수단을 구비하는 것을 특징으로 하는 텔레폰 회로.The signal of claim 1, wherein the correlator comprises: means for generating a right angle related signal representative of a signal in one of the amplifiers, and a signal in the remaining amplifiers of the amplifier in response to a right angle related signal to generate a red signal; And multiplication means for multiplying and means for processing said red signal to generate a control signal for controlling the gain of a variable gain stage. 제2항에 있어서, 상기 적신호를 처리하기 위한 수단은, 상기 적신호를 정류하기 위한 정류수단과, 상기 제어 신호를 발생시키기 위해 정류된 적신호를 부가시키기 위한 부가수단을 구비하는 것을 특징으로 하는 텔레폰 회로.3. The telephone circuit according to claim 2, wherein the means for processing the red signal comprises a rectifying means for rectifying the red signal and additional means for adding the rectified red signal to generate the control signal. . 제2항 또는 제3항에 있어서, 상기 상관 관계기는, 직각-관련 신호를 발생시키기 위한 수단과, 상기 직각-관련 신호를 수신하기 위한 승산 수단 사이에 결합되어 상기 증폭기중의 한 증폭기에서의 신호의 레벨을 나타내는 신호로 상기 신호를 제산하기 위한 평균화 수단을 더 구비하는 것을 특징으로 하는 텔레폰 회로.4. A signal as claimed in claim 2 or 3, wherein the correlator is coupled between means for generating a right-related signal and multiplication means for receiving the right-related signal. And averaging means for dividing the signal by a signal representing the level of the signal. 제2항 내지 4항중의 어느 한 항에 있어서, 상기 한 증폭기는 확성기 증폭기를 구비하는 것을 특징으로 하는 텔레폰 회로.5. A telephone circuit as claimed in claim 2, wherein said one amplifier comprises a loudspeaker amplifier. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019900701593A 1988-11-26 1989-11-24 Telephone circuit KR900702698A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB8827672.0 1988-11-26
GB8827672A GB2225517B (en) 1988-11-26 1988-11-26 Telephone circuits
PCT/EP1989/001422 WO1990006649A1 (en) 1988-11-26 1989-11-24 Telephone circuits

Publications (1)

Publication Number Publication Date
KR900702698A true KR900702698A (en) 1990-12-08

Family

ID=10647533

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019900701593A KR900702698A (en) 1988-11-26 1989-11-24 Telephone circuit

Country Status (5)

Country Link
EP (1) EP0396727A1 (en)
JP (1) JPH02503739A (en)
KR (1) KR900702698A (en)
GB (1) GB2225517B (en)
WO (1) WO1990006649A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2606167B2 (en) * 1994-12-07 1997-04-30 日本電気株式会社 Telephone
DE19543666A1 (en) * 1995-11-23 1997-05-28 Sel Alcatel Ag Echo canceller
GB2525947B (en) 2014-10-31 2016-06-22 Imagination Tech Ltd Automatic tuning of a gain controller

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3642994A (en) * 1970-05-25 1972-02-15 Fernando Anton T Therapeutic process using melatonin
US4621356A (en) * 1983-07-18 1986-11-04 Scipione Fred J Communications interface for duplex transmission and reception of data and other signals over telephone lines

Also Published As

Publication number Publication date
GB8827672D0 (en) 1988-12-29
JPH02503739A (en) 1990-11-01
WO1990006649A1 (en) 1990-06-14
GB2225517A (en) 1990-05-30
EP0396727A1 (en) 1990-11-14
GB2225517B (en) 1993-03-31

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Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application