HK48679A - Symmetrical circuit arrangement for forming a variable a.c. resistance - Google Patents

Symmetrical circuit arrangement for forming a variable a.c. resistance

Info

Publication number
HK48679A
HK48679A HK486/79A HK48679A HK48679A HK 48679 A HK48679 A HK 48679A HK 486/79 A HK486/79 A HK 486/79A HK 48679 A HK48679 A HK 48679A HK 48679 A HK48679 A HK 48679A
Authority
HK
Hong Kong
Prior art keywords
variable
resistance
forming
circuit arrangement
symmetrical circuit
Prior art date
Application number
HK486/79A
Other languages
English (en)
Original Assignee
Philips 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 Nv filed Critical Philips Nv
Publication of HK48679A publication Critical patent/HK48679A/xx

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
HK486/79A 1974-06-17 1979-07-19 Symmetrical circuit arrangement for forming a variable a.c. resistance HK48679A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7408034.A NL161318C (nl) 1974-06-17 1974-06-17 Symmetrische inrichting voor het vormen van een regel- bare wisselstroomweerstand.

Publications (1)

Publication Number Publication Date
HK48679A true HK48679A (en) 1979-07-27

Family

ID=19821555

Family Applications (1)

Application Number Title Priority Date Filing Date
HK486/79A HK48679A (en) 1974-06-17 1979-07-19 Symmetrical circuit arrangement for forming a variable a.c. resistance

Country Status (14)

Country Link
JP (1) JPS5329584B2 (id)
AR (1) AR205571A1 (id)
AU (1) AU499961B2 (id)
BR (1) BR7503768A (id)
CA (1) CA1035468A (id)
DE (2) DE2560093C3 (id)
ES (1) ES438562A1 (id)
FR (1) FR2275070A1 (id)
GB (1) GB1519831A (id)
HK (1) HK48679A (id)
IT (1) IT1036297B (id)
NL (1) NL161318C (id)
SE (1) SE413448B (id)
ZA (1) ZA753735B (id)

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 (de) * 1997-04-02 1998-10-01 Telefunken Microelectron Steuerbare Widerstandsanordnung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1320027A (fr) 1961-10-19 1963-03-08 Westinghouse Electric Corp Potentiomètre à semi-conducteur

Also Published As

Publication number Publication date
IT1036297B (it) 1979-10-30
NL161318B (nl) 1979-08-15
ES438562A1 (es) 1977-05-16
GB1519831A (en) 1978-08-02
NL7408034A (nl) 1975-12-19
AU499961B2 (en) 1979-05-10
DE2526309B2 (de) 1979-09-20
DE2560093C3 (de) 1982-01-28
SE7506779L (sv) 1975-12-18
JPS5329584B2 (id) 1978-08-22
SE413448B (sv) 1980-05-27
ZA753735B (en) 1977-01-26
FR2275070A1 (fr) 1976-01-09
DE2526309C3 (de) 1980-06-04
DE2526309A1 (de) 1976-01-02
DE2560093B2 (de) 1981-04-23
FR2275070B1 (id) 1980-03-21
JPS5116885A (id) 1976-02-10
CA1035468A (en) 1978-07-25
BR7503768A (pt) 1976-07-06
AU8214675A (en) 1976-12-23
AR205571A1 (es) 1976-05-14
NL161318C (nl) 1980-01-15

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