JPH0444844B2 - - Google Patents

Info

Publication number
JPH0444844B2
JPH0444844B2 JP60159720A JP15972085A JPH0444844B2 JP H0444844 B2 JPH0444844 B2 JP H0444844B2 JP 60159720 A JP60159720 A JP 60159720A JP 15972085 A JP15972085 A JP 15972085A JP H0444844 B2 JPH0444844 B2 JP H0444844B2
Authority
JP
Japan
Prior art keywords
transistor
resistor
amplifier
collector
potential
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 - Lifetime
Application number
JP60159720A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6220405A (ja
Inventor
Yoshio Sasaki
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic 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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP60159720A priority Critical patent/JPS6220405A/ja
Priority to GB8617337A priority patent/GB2179513B/en
Priority to US06/886,719 priority patent/US4754232A/en
Priority to DE19863624391 priority patent/DE3624391A1/de
Publication of JPS6220405A publication Critical patent/JPS6220405A/ja
Publication of JPH0444844B2 publication Critical patent/JPH0444844B2/ja
Granted 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
    • H03G3/348—Muting in response to a mechanical action or to power supply variations, e.g. during tuning; Click removal circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0088—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using discontinuously variable devices, e.g. switch-operated

Landscapes

  • Amplifiers (AREA)
  • Control Of Amplification And Gain Control (AREA)
JP60159720A 1985-07-18 1985-07-18 増幅度調整回路 Granted JPS6220405A (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP60159720A JPS6220405A (ja) 1985-07-18 1985-07-18 増幅度調整回路
GB8617337A GB2179513B (en) 1985-07-18 1986-07-16 Amplification gain adjusting circuit
US06/886,719 US4754232A (en) 1985-07-18 1986-07-18 Amplification gain adjusting circuit
DE19863624391 DE3624391A1 (de) 1985-07-18 1986-07-18 Verstaerkungseinstellschaltung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60159720A JPS6220405A (ja) 1985-07-18 1985-07-18 増幅度調整回路

Publications (2)

Publication Number Publication Date
JPS6220405A JPS6220405A (ja) 1987-01-29
JPH0444844B2 true JPH0444844B2 (US06277897-20010821-C00009.png) 1992-07-23

Family

ID=15699804

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60159720A Granted JPS6220405A (ja) 1985-07-18 1985-07-18 増幅度調整回路

Country Status (4)

Country Link
US (1) US4754232A (US06277897-20010821-C00009.png)
JP (1) JPS6220405A (US06277897-20010821-C00009.png)
DE (1) DE3624391A1 (US06277897-20010821-C00009.png)
GB (1) GB2179513B (US06277897-20010821-C00009.png)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5892800A (en) * 1997-03-20 1999-04-06 Sigmatel, Inc. Data detection circuit having a pre-amplifier circuit
US20050078841A1 (en) * 2003-10-14 2005-04-14 Boor Steven E. Method and apparatus for resetting a buffer amplifier
US10516935B2 (en) 2015-07-15 2019-12-24 Knowles Electronics, Llc Hybrid transducer
US9843292B2 (en) 2015-10-14 2017-12-12 Knowles Electronics, Llc Method and apparatus for maintaining DC bias
WO2017083679A1 (en) 2015-11-12 2017-05-18 Knowles Electronics, Llc Method and apparatus to increase audio band microphone sensitivity

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5765913A (en) * 1980-10-13 1982-04-21 Matsushita Electric Ind Co Ltd Variable attenuator

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3264564A (en) * 1963-02-07 1966-08-02 Rca Corp Variable impedance device for transistor automatic gain control
US3581223A (en) * 1969-04-30 1971-05-25 Hc Electronics Inc Fast response dynamic gain control circuit
DE1943788A1 (de) * 1969-08-28 1971-03-04 Siemens Ag Schaltungsanordnung fuer eine integrierte Verstaerkerstufe mit gesteuerter Gegenkopplung
JPS5648883B1 (US06277897-20010821-C00009.png) * 1971-07-24 1981-11-18
US3903480A (en) * 1973-06-18 1975-09-02 Sony Corp Automatic gain control circuit
DE2542745C2 (de) * 1975-09-25 1983-06-09 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verstärker mit veränderbarem Übertragungsmaß, insbesondere für ein Kompander-System
JPS5721379Y2 (US06277897-20010821-C00009.png) * 1977-02-01 1982-05-10
JPS5893010U (ja) * 1981-12-18 1983-06-23 松下電器産業株式会社 ミユ−テイング回路

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5765913A (en) * 1980-10-13 1982-04-21 Matsushita Electric Ind Co Ltd Variable attenuator

Also Published As

Publication number Publication date
GB2179513B (en) 1989-09-06
US4754232A (en) 1988-06-28
GB8617337D0 (en) 1986-08-20
DE3624391A1 (de) 1987-02-05
JPS6220405A (ja) 1987-01-29
GB2179513A (en) 1987-03-04
DE3624391C2 (US06277897-20010821-C00009.png) 1993-07-08

Similar Documents

Publication Publication Date Title
JPS60102028A (ja) 無線周波数信号受信器用トランジスタ化された増幅器および混合器入力段
US2866859A (en) Audio amplifier bridge input circuits
US4015215A (en) Push-pull power amplifier circuit
JPH0444844B2 (US06277897-20010821-C00009.png)
US4607234A (en) Gain-controlled amplifier arrangement
JPS63164604A (ja) 増幅回路配置
US4427949A (en) Signal intercepting circuit
US4341991A (en) Voltage stabilizer suitable for a telephone set
US3124760A (en) Transistor amplifies with variable
US5157347A (en) Switching bridge amplifier
CA1312359C (en) Operational amplifier stages
US4085340A (en) Range switching transient eliminator circuit
US4048523A (en) Electronic filter with active elements
US4523156A (en) Anti-distortion anti-transient tone control circuit
JPS631768B2 (US06277897-20010821-C00009.png)
US5150416A (en) Electronic level control circuit for sound signals
JPH0326565B2 (US06277897-20010821-C00009.png)
JPH0533066Y2 (US06277897-20010821-C00009.png)
JPS5921535Y2 (ja) 音量制御回路
JP3014557B2 (ja) バッテリー内蔵オーディオ装置及びオーディオ信号増幅回路
JPH05327380A (ja) 増幅器
JPS5949728B2 (ja) 可変インピ−ダンス回路
JPH02161818A (ja) 傾斜電流出力を有する論理バッファ回路
JP2652991B2 (ja) 直流帰還増幅器
US4620108A (en) Means providing independently controlled superimposed AC and DC voltages