DE3380760D1 - A switching circuit operable as an amplifier and a muting circuit - Google Patents

A switching circuit operable as an amplifier and a muting circuit

Info

Publication number
DE3380760D1
DE3380760D1 DE8383105382T DE3380760T DE3380760D1 DE 3380760 D1 DE3380760 D1 DE 3380760D1 DE 8383105382 T DE8383105382 T DE 8383105382T DE 3380760 T DE3380760 T DE 3380760T DE 3380760 D1 DE3380760 D1 DE 3380760D1
Authority
DE
Germany
Prior art keywords
amplifier
circuit
muting
operable
switching 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.)
Expired
Application number
DE8383105382T
Other languages
English (en)
Inventor
Shinji C O Nec Ic Micro Miyata
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Application granted granted Critical
Publication of DE3380760D1 publication Critical patent/DE3380760D1/de
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/341—Muting when no signals or only weak signals are present
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/04—Modifications of control circuit to reduce distortion caused by control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
    • H03G11/08—Limiting rate of change of amplitude
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
DE8383105382T 1982-05-31 1983-05-31 A switching circuit operable as an amplifier and a muting circuit Expired DE3380760D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57092585A JPS58209210A (ja) 1982-05-31 1982-05-31 増幅器

Publications (1)

Publication Number Publication Date
DE3380760D1 true DE3380760D1 (en) 1989-11-23

Family

ID=14058510

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8383105382T Expired DE3380760D1 (en) 1982-05-31 1983-05-31 A switching circuit operable as an amplifier and a muting circuit

Country Status (4)

Country Link
US (1) US4491800A (de)
EP (1) EP0095774B1 (de)
JP (1) JPS58209210A (de)
DE (1) DE3380760D1 (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4506381A (en) * 1981-12-29 1985-03-19 Mitsubishi Denki Kabushiki Kaisha Aural transmitter device
DE3729656A1 (de) * 1987-09-04 1989-03-23 Thomson Brandt Gmbh Schaltungsanordnung zur unterdrueckung von stoergeraeuschen
US4978926A (en) * 1989-12-21 1990-12-18 Ford Motor Company Audio limiter using voltage multiplexed feedback
US5029005A (en) * 1990-04-25 1991-07-02 Rca Licensing Corporation Apparatus for the muting of an audio power amplifier in a standby mode
US5255094A (en) * 1990-10-10 1993-10-19 Thomson Consumer Electronics, S.A. Muting circuit for eliminating transient signals generated due to power supply turn-on and turn-off
KR0156021B1 (ko) * 1993-06-08 1998-12-15 쯔지 하루오 이득 레벨들간의 고속 스위칭이 가능하고 광범위한 입사광량에 걸쳐 충분한 신호대 잡음비를 얻을 수 있는 수광/증폭 장치
US5621359A (en) * 1995-07-27 1997-04-15 Lucent Technologies Inc. Gain selection technique
US6049246A (en) * 1998-12-11 2000-04-11 Vivid Semiconductor, Inc. Amplifier offset cancellation using current copier
JP3496612B2 (ja) * 2000-02-04 2004-02-16 ヤマハ株式会社 電子ボリューム回路
WO2002013380A2 (en) * 2000-08-04 2002-02-14 Maxim Integrated Products, Inc. Methods and apparatus for muting the output of amplifier circuits
US8138828B2 (en) * 2010-03-30 2012-03-20 Texas Instruments Incorporated Active mute scheme for an amplifier
CN109195067A (zh) * 2018-07-20 2019-01-11 广州市欧智智能科技有限公司 一种静音控制电路

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3505539A (en) * 1966-09-01 1970-04-07 Ibm Low noise gated d.c. amplifier
DE2629701A1 (de) * 1976-07-02 1978-01-05 Licentia Gmbh Verstaerker mit steuerbarem uebertragungsmass und umschaltbarer steuerkennlinie
US4034308A (en) * 1976-07-06 1977-07-05 Licentia Patent-Verwaltungs-G.M.B.H. Amplifier with controllable transmission factor and switchable control characteristic

Also Published As

Publication number Publication date
JPS58209210A (ja) 1983-12-06
EP0095774B1 (de) 1989-10-18
US4491800A (en) 1985-01-01
EP0095774A2 (de) 1983-12-07
JPH0223047B2 (de) 1990-05-22
EP0095774A3 (en) 1986-03-26

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee