ES438562A1 - Symmetrical circuit arrangement for forming a variable ac resistance - Google Patents

Symmetrical circuit arrangement for forming a variable ac resistance

Info

Publication number
ES438562A1
ES438562A1 ES438562A ES438562A ES438562A1 ES 438562 A1 ES438562 A1 ES 438562A1 ES 438562 A ES438562 A ES 438562A ES 438562 A ES438562 A ES 438562A ES 438562 A1 ES438562 A1 ES 438562A1
Authority
ES
Spain
Prior art keywords
terminal
variable
resistance
forming
circuit arrangement
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
ES438562A
Other languages
Spanish (es)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of ES438562A1 publication Critical patent/ES438562A1/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03G1/0082—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using bipolar transistor-type devices
    • 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
    • H03G1/0017—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal the device being at least one of the amplifying solid state elements of the amplifier
    • H03G1/0023—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal the device being at least one of the amplifying solid state elements of the amplifier in emitter-coupled or cascode amplifiers

Landscapes

  • Bipolar Transistors (AREA)
  • Semiconductor Integrated Circuits (AREA)
  • Bipolar Integrated Circuits (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

A symmetrical arrangement to form a variable resistance for alternating current, between a first and a second terminal, characterized by an elongated diode constituted by a PN junction between first and second regions, of opposite conductivity types, of a semiconductor chip, providing the first and second terminals and, essentially halfway between these terminals, a third terminal in the first region along the PN junction, polarizing current conducting means being connected to the third terminal and means for supplying a current being connected of control to the second region. (Machine-translation by Google Translate, not legally binding)
ES438562A 1974-06-17 1975-06-14 Symmetrical circuit arrangement for forming a variable ac resistance Expired ES438562A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7408034.A NL161318C (en) 1974-06-17 1974-06-17 SYMMETRICAL DEVICE FOR FORMING AN ADJUSTABLE AC AC RESISTANCE.

Publications (1)

Publication Number Publication Date
ES438562A1 true ES438562A1 (en) 1977-05-16

Family

ID=19821555

Family Applications (1)

Application Number Title Priority Date Filing Date
ES438562A Expired ES438562A1 (en) 1974-06-17 1975-06-14 Symmetrical circuit arrangement for forming a variable ac resistance

Country Status (14)

Country Link
JP (1) JPS5329584B2 (en)
AR (1) AR205571A1 (en)
AU (1) AU499961B2 (en)
BR (1) BR7503768A (en)
CA (1) CA1035468A (en)
DE (2) DE2526309C3 (en)
ES (1) ES438562A1 (en)
FR (1) FR2275070A1 (en)
GB (1) GB1519831A (en)
HK (1) HK48679A (en)
IT (1) IT1036297B (en)
NL (1) NL161318C (en)
SE (1) SE413448B (en)
ZA (1) ZA753735B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52153651A (en) * 1976-06-17 1977-12-20 Sony Corp Gain changing circuit
US4345214A (en) 1980-04-23 1982-08-17 Rca Corporation Variable emitter degeneration gain-controlled amplifier
US4833422A (en) * 1987-09-24 1989-05-23 Burr-Brown Corporation Programmable gain instrumentation amplifier
DE19713571C1 (en) * 1997-04-02 1998-10-01 Telefunken Microelectron Controlled resistance for semi conductor differencing amplifier

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1320027A (en) 1961-10-19 1963-03-08 Westinghouse Electric Corp Semiconductor potentiometer

Also Published As

Publication number Publication date
DE2560093B2 (en) 1981-04-23
GB1519831A (en) 1978-08-02
NL161318C (en) 1980-01-15
DE2560093C3 (en) 1982-01-28
BR7503768A (en) 1976-07-06
DE2526309C3 (en) 1980-06-04
ZA753735B (en) 1977-01-26
DE2526309A1 (en) 1976-01-02
NL7408034A (en) 1975-12-19
JPS5116885A (en) 1976-02-10
FR2275070A1 (en) 1976-01-09
IT1036297B (en) 1979-10-30
FR2275070B1 (en) 1980-03-21
AR205571A1 (en) 1976-05-14
DE2526309B2 (en) 1979-09-20
SE413448B (en) 1980-05-27
JPS5329584B2 (en) 1978-08-22
CA1035468A (en) 1978-07-25
SE7506779L (en) 1975-12-18
AU499961B2 (en) 1979-05-10
HK48679A (en) 1979-07-27
AU8214675A (en) 1976-12-23
NL161318B (en) 1979-08-15

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