NL161318B - SYMMETRICAL DEVICE FOR FORMING AN ADJUSTABLE AC CURRENT RESISTOR. - Google Patents
SYMMETRICAL DEVICE FOR FORMING AN ADJUSTABLE AC CURRENT RESISTOR.Info
- Publication number
- NL161318B NL161318B NL7408034.A NL7408034A NL161318B NL 161318 B NL161318 B NL 161318B NL 7408034 A NL7408034 A NL 7408034A NL 161318 B NL161318 B NL 161318B
- Authority
- NL
- Netherlands
- Prior art keywords
- adjustable
- forming
- current resistor
- symmetrical device
- symmetrical
- Prior art date
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
Priority Applications (16)
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. |
AR259237A AR205571A1 (en) | 1974-06-17 | 1975-01-01 | SYMMETRICAL ARRANGEMENT FORMING A VARIABLE ALTERNATING CURRENT RESISTANCE BETWEEN A FIRST AND A SECOND TERMINAL |
ZA3735A ZA753735B (en) | 1974-06-17 | 1975-06-10 | Symmetrical arrangement for forming a variable alternating-current resistance |
CA229,066A CA1035468A (en) | 1974-06-17 | 1975-06-11 | Symmetrical arrangement for forming a variable alternating-current resistance |
DE2560093A DE2560093C3 (en) | 1974-06-17 | 1975-06-12 | Symmetrical, controllable alternating current resistance |
DE2526309A DE2526309C3 (en) | 1974-06-17 | 1975-06-12 | Controllable AC resistance |
IT68533/75A IT1036297B (en) | 1974-06-17 | 1975-06-13 | SYMMETRIC CIRCUIT ARRANGEMENT FORM A VARIABLE RESISTANCE FOR ALTERNATING CURRENT |
SE7506779A SE413448B (en) | 1974-06-17 | 1975-06-13 | SYMETRIC DEVICE TO CREATE A VARIABLE AC RESISTANCE |
GB25370/75A GB1519831A (en) | 1974-06-17 | 1975-06-13 | Symmetrical circuit arrangement for forming a variable ac resistance |
ES438562A ES438562A1 (en) | 1974-06-17 | 1975-06-14 | Symmetrical circuit arrangement for forming a variable ac resistance |
JP7211675A JPS5329584B2 (en) | 1974-06-17 | 1975-06-16 | |
BR4849/75D BR7503768A (en) | 1974-06-17 | 1975-06-16 | SYMMETRIC ARRANGEMENT TO FORM A VARIABLE ALTERNATE CURRENT RESISTANCE |
FR7518899A FR2275070A1 (en) | 1974-06-17 | 1975-06-17 | SYMMETRICAL DEVICE SERVING TO FORM A REGULATED IMPEDANCE |
AU82146/75A AU499961B2 (en) | 1974-06-17 | 1975-06-17 | Variable alternating-current resistance |
US05/847,221 US4131809A (en) | 1974-06-17 | 1977-10-31 | Symmetrical arrangement for forming a variable alternating-current resistance |
HK486/79A HK48679A (en) | 1974-06-17 | 1979-07-19 | Symmetrical circuit arrangement for forming a variable a.c. resistance |
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 (3)
Publication Number | Publication Date |
---|---|
NL7408034A NL7408034A (en) | 1975-12-19 |
NL161318B true NL161318B (en) | 1979-08-15 |
NL161318C NL161318C (en) | 1980-01-15 |
Family
ID=19821555
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL7408034.A NL161318C (en) | 1974-06-17 | 1974-06-17 | SYMMETRICAL DEVICE FOR FORMING AN ADJUSTABLE AC 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)
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)
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 BR BR4849/75D patent/BR7503768A/en unknown
- 1975-06-16 JP JP7211675A patent/JPS5329584B2/ja not_active Expired
- 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 |
IT1036297B (en) | 1979-10-30 |
JPS5116885A (en) | 1976-02-10 |
HK48679A (en) | 1979-07-27 |
JPS5329584B2 (en) | 1978-08-22 |
DE2560093C3 (en) | 1982-01-28 |
NL7408034A (en) | 1975-12-19 |
BR7503768A (en) | 1976-07-06 |
DE2526309A1 (en) | 1976-01-02 |
SE7506779L (en) | 1975-12-18 |
ES438562A1 (en) | 1977-05-16 |
DE2560093B2 (en) | 1981-04-23 |
ZA753735B (en) | 1977-01-26 |
DE2526309B2 (en) | 1979-09-20 |
FR2275070B1 (en) | 1980-03-21 |
FR2275070A1 (en) | 1976-01-09 |
DE2526309C3 (en) | 1980-06-04 |
AR205571A1 (en) | 1976-05-14 |
SE413448B (en) | 1980-05-27 |
CA1035468A (en) | 1978-07-25 |
AU8214675A (en) | 1976-12-23 |
NL161318C (en) | 1980-01-15 |
GB1519831A (en) | 1978-08-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NL80 | Abbreviated name of patent owner mentioned of already nullified patent |
Owner name: PHILIPS |
|
V4 | Lapsed because of reaching the maximum lifetime of a patent |