IT1036297B - SYMMETRIC CIRCUIT ARRANGEMENT FORM A VARIABLE RESISTANCE FOR ALTERNATING CURRENT - Google Patents

SYMMETRIC CIRCUIT ARRANGEMENT FORM A VARIABLE RESISTANCE FOR ALTERNATING CURRENT

Info

Publication number: IT1036297B
Authority: IT; Italy
Prior art keywords: alternating current; circuit arrangement; variable resistance; arrangement form; symmetric circuit
Prior art date: 1974-06-17

Application number

IT68533/75A

Other languages

Italian (it)

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.)

1974-06-17

Filing date

1975-06-13

Publication date

1979-10-30

1975-06-13 Application filed by Philips Nv filed Critical Philips Nv

1979-10-30 Application granted granted Critical

1979-10-30 Publication of IT1036297B publication Critical patent/IT1036297B/en

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

IT68533/75A 1974-06-17 1975-06-13 SYMMETRIC CIRCUIT ARRANGEMENT FORM A VARIABLE RESISTANCE FOR ALTERNATING CURRENT IT1036297B (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
IT1036297B true IT1036297B (en)	1979-10-30

Family

ID=19821555

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IT68533/75A IT1036297B (en)	1974-06-17	1975-06-13	SYMMETRIC CIRCUIT ARRANGEMENT FORM A VARIABLE RESISTANCE FOR ALTERNATING CURRENT

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

1974
- 1974-06-17 NL NL7408034.A patent/NL161318C/en not_active IP Right Cessation
1975
- 1975-01-01 AR AR259237A patent/AR205571A1/en active
- 1975-06-10 ZA ZA3735A patent/ZA753735B/en unknown
- 1975-06-11 CA CA229,066A patent/CA1035468A/en not_active Expired
- 1975-06-12 DE DE2526309A patent/DE2526309C3/en not_active Expired
- 1975-06-12 DE DE2560093A patent/DE2560093C3/en not_active Expired
- 1975-06-13 GB GB25370/75A patent/GB1519831A/en not_active Expired
- 1975-06-13 SE SE7506779A patent/SE413448B/en not_active IP Right Cessation
- 1975-06-13 IT IT68533/75A patent/IT1036297B/en active
- 1975-06-14 ES ES438562A patent/ES438562A1/en not_active Expired
- 1975-06-16 JP JP7211675A patent/JPS5329584B2/ja not_active Expired
- 1975-06-16 BR BR4849/75D patent/BR7503768A/en unknown
- 1975-06-17 FR FR7518899A patent/FR2275070A1/en active Granted
- 1975-06-17 AU AU82146/75A patent/AU499961B2/en not_active Expired
1979
- 1979-07-19 HK HK486/79A patent/HK48679A/en unknown

Also Published As

Publication number	Publication date
AU499961B2 (en)	1979-05-10
ES438562A1 (en)	1977-05-16
SE7506779L (en)	1975-12-18
FR2275070A1 (en)	1976-01-09
JPS5329584B2 (en)	1978-08-22
DE2526309A1 (en)	1976-01-02
NL7408034A (en)	1975-12-19
SE413448B (en)	1980-05-27
AR205571A1 (en)	1976-05-14
DE2560093C3 (en)	1982-01-28
NL161318C (en)	1980-01-15
HK48679A (en)	1979-07-27
CA1035468A (en)	1978-07-25
FR2275070B1 (en)	1980-03-21
BR7503768A (en)	1976-07-06
GB1519831A (en)	1978-08-02
NL161318B (en)	1979-08-15
AU8214675A (en)	1976-12-23
DE2526309C3 (en)	1980-06-04
DE2560093B2 (en)	1981-04-23
ZA753735B (en)	1977-01-26
DE2526309B2 (en)	1979-09-20
JPS5116885A (en)	1976-02-10

Publication	Publication Date	Title
IT1041674B (en)	1980-01-10	ELECTRIC MACHINE
DK352375A (en)	1976-02-06	PRINTED CIRCUIT WITH VARIABLE INDUCTANCE
FR2277463A1 (en)	1976-01-30	VARIABLE REACTANCE CIRCUIT
IT1034733B (en)	1979-10-10	ELECTRIC MACHINE
NL7410603A (en)	1975-02-11	ELECTRIC CIRCUIT.
SE7510212L (en)	1976-03-17	SORTING MACHINE
IT1041910B (en)	1980-01-10	VARIABLE TIRARDO EQUALIZER
SE407493B (en)	1979-03-26	ELECTRICAL FILTER CIRCUIT
IT999174B (en)	1976-02-20	VARIABLE ELECTRIC RESISTANCE
IT1028872B (en)	1979-02-10	MACHINE RAKE
NL7612075A (en)	1977-05-03	CIRCUIT WITH ELECTRIC VARIABLE IMPEDANCE.
FR2284465A1 (en)	1976-04-09	CONTINUOUSLY PRINTED FORM SETS BREAKER
BR7500888A (en)	1975-12-02	LEAF COUNTING MACHINE
IT1036297B (en)	1979-10-30	SYMMETRIC CIRCUIT ARRANGEMENT FORM A VARIABLE RESISTANCE FOR ALTERNATING CURRENT
FR2288410A2 (en)	1976-05-14	DIRECT CURRENT MACHINE
IT1049981B (en)	1981-02-10	ELECTRIC MACHINE
NL7505611A (en)	1975-11-25	SHORT CIRCUIT CURRENT LIMITER.
SE7508342L (en)	1976-01-26	ELECTRIC CIRCUIT.
IT1043397B (en)	1980-02-20	ELECTRIC MACHINE
BE833532A (en)	1976-01-16	SORTING MACHINE
NL7510108A (en)	1976-03-02	CURRENT LIMITATION DEVICE.
SE7514042L (en)	1976-06-17	ELECTRICAL RESISTANCE
ATA68275A (en)	1978-03-15	OVERVOLTAGE CIRCUIT
IT1050336B (en)	1981-03-10	ALTERNATING CURRENT GENERATOR
SE7500363L (en)	1975-10-13	ADJUSTABLE ELECTRICAL COMPONENT.