BR7601801A - Circuito de resitencia variavel e circuito amplificador decorrente continua de ganho variavel - Google Patents

Circuito de resitencia variavel e circuito amplificador decorrente continua de ganho variavel

Info

Publication number
BR7601801A
BR7601801A BR7601801A BR7601801A BR7601801A BR 7601801 A BR7601801 A BR 7601801A BR 7601801 A BR7601801 A BR 7601801A BR 7601801 A BR7601801 A BR 7601801A BR 7601801 A BR7601801 A BR 7601801A
Authority
BR
Brazil
Prior art keywords
variable
arising out
circuit
amplifier circuit
variable resistance
Prior art date
Application number
BR7601801A
Other languages
English (en)
Inventor
K Kataoka
H Uchiike
Original Assignee
Yokogawa Electric Works 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
Priority claimed from JP50038758A external-priority patent/JPS5846888B2/ja
Priority claimed from JP50038759A external-priority patent/JPS5946128B2/ja
Application filed by Yokogawa Electric Works Ltd filed Critical Yokogawa Electric Works Ltd
Publication of BR7601801A publication Critical patent/BR7601801A/pt

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/40—Impedance converters
    • H03H11/405—Positive impedance converters
    • 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
    • H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
    • H03G1/007—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using field-effect transistors [FET]
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/001—Digital control of analog signals
BR7601801A 1975-03-31 1976-03-24 Circuito de resitencia variavel e circuito amplificador decorrente continua de ganho variavel BR7601801A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP50038758A JPS5846888B2 (ja) 1975-03-31 1975-03-31 カヘンテイコウカイロ
JP50038759A JPS5946128B2 (ja) 1975-03-31 1975-03-31 可変抵抗回路

Publications (1)

Publication Number Publication Date
BR7601801A true BR7601801A (pt) 1976-10-05

Family

ID=26378052

Family Applications (1)

Application Number Title Priority Date Filing Date
BR7601801A BR7601801A (pt) 1975-03-31 1976-03-24 Circuito de resitencia variavel e circuito amplificador decorrente continua de ganho variavel

Country Status (3)

Country Link
US (1) US4013975A (pt)
BR (1) BR7601801A (pt)
GB (1) GB1514136A (pt)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4118640A (en) * 1976-10-22 1978-10-03 National Semiconductor Corporation JFET base junction transistor clamp
US4257064A (en) * 1980-02-19 1981-03-17 Hughes Aircraft Company Wideband linear video contrast control
HU182390B (en) * 1981-12-18 1983-12-28 Telefongyar With the active elements formed two-pole terminal network equivalent to a resistor
US4618743A (en) * 1984-11-27 1986-10-21 Harris Corporation Monolithic transient protector
GB8525694D0 (en) * 1985-10-18 1985-11-20 Neotronics Ltd Gas monitor circuits
US4859955A (en) * 1985-11-06 1989-08-22 The Grass Valley Group, Inc. Apparatus for smoothing an abrupt change in signal level
BE1004055A4 (nl) * 1987-11-24 1992-09-15 Feremans Eric Edmond Werkwijze en inrichting voor het reduceren van ruis.
US4868519A (en) * 1988-11-02 1989-09-19 Dnic Brokerage Company Microprocessor-controlled amplifier
FR2657736A1 (fr) * 1990-01-31 1991-08-02 Sgs Thomson Microelectronics Circuit a resistance variable commandee en tension.
JPH0634246B2 (ja) * 1990-10-11 1994-05-02 東光株式会社 時定数可変形の微分器
SE502766C2 (sv) * 1994-03-23 1996-01-08 Ellemtel Utvecklings Ab Kopplingsarrangemang
US5789973A (en) * 1996-09-04 1998-08-04 Motorola, Inc. Resistorless operational transconductance amplifier circuit
KR100298435B1 (ko) * 1998-06-03 2001-08-07 김영환 온도보상기능을갖는자동이득제어장치
JP3292147B2 (ja) * 1998-07-10 2002-06-17 日本電気株式会社 受光回路
CN100362741C (zh) * 2003-11-11 2008-01-16 浙江中控技术有限公司 数字式变阻装置
EP1608062A1 (de) * 2004-06-14 2005-12-21 Siemens Building Technologies AG Digital steuerbarer Widerstand
CN102914973B (zh) * 2012-10-22 2015-06-17 南京航空航天大学 用于发动机控制器实物在回路仿真试验的电子合成电阻
US9203350B2 (en) * 2013-05-20 2015-12-01 Analog Devices Global Transconductance circuit and a current digital to analog converter using such transconductance circuits
DE102014106494B4 (de) 2013-05-20 2020-07-30 Analog Devices Global Transkonduktanzschaltkreis und digital-analog-stromwandler,der derartige transkonduktanzschaltkreise nutzt
CN104914781B (zh) * 2015-04-14 2018-04-27 常州信息职业技术学院 程控交直流电阻箱

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3177350A (en) * 1961-05-31 1965-04-06 Gen Electric Transistorized step multiplier
US3544812A (en) * 1967-12-18 1970-12-01 Ibm Analog multiplier
US3539936A (en) * 1968-02-09 1970-11-10 Du Pont Automatic range changing circuit
US3652791A (en) * 1969-01-08 1972-03-28 Xerox Corp Circuitry for distinguishing between background and intelligence areas on a document
US3629720A (en) * 1970-03-12 1971-12-21 Canadian Patents Dev Digitally controlled variable-gain linear dc amplifier
US3631262A (en) * 1970-03-31 1971-12-28 Gen Electric Linear variable gain circuit utilizing a field effect transistor
GB1424670A (en) * 1972-04-13 1976-02-11 Plessey Co Ltd Circuit arrangements
US3918003A (en) * 1974-10-29 1975-11-04 Bell Telephone Labor Inc Combined feedback and feedforward automatic gain control

Also Published As

Publication number Publication date
AU1251776A (en) 1977-03-10
GB1514136A (en) 1978-06-14
US4013975A (en) 1977-03-22

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