ZA777294B - Improvements in or relating to controllable electronic resistors - Google Patents
Improvements in or relating to controllable electronic resistorsInfo
- Publication number
- ZA777294B ZA777294B ZA00777294A ZA777294A ZA777294B ZA 777294 B ZA777294 B ZA 777294B ZA 00777294 A ZA00777294 A ZA 00777294A ZA 777294 A ZA777294 A ZA 777294A ZA 777294 B ZA777294 B ZA 777294B
- Authority
- ZA
- South Africa
- Prior art keywords
- relating
- controllable electronic
- electronic resistors
- resistors
- controllable
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
-
- 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
- H03G1/0047—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using photo-electric elements
-
- 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 FET 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
- H03G1/0035—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
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/46—One-port networks
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2655320A DE2655320C3 (de) | 1976-12-07 | 1976-12-07 | Steuerbarer elektronischer Widerstand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ZA777294B true ZA777294B (en) | 1978-10-25 |
Family
ID=5994856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ZA00777294A ZA777294B (en) | 1976-12-07 | 1977-12-07 | Improvements in or relating to controllable electronic resistors |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US4137466A (fr) |
| JP (1) | JPS5383554A (fr) |
| AT (1) | AT358100B (fr) |
| BE (1) | BE861574A (fr) |
| CA (1) | CA1089038A (fr) |
| CH (1) | CH622138A5 (fr) |
| DE (1) | DE2655320C3 (fr) |
| FR (1) | FR2373916A1 (fr) |
| GB (1) | GB1590038A (fr) |
| IL (1) | IL53551A (fr) |
| SE (1) | SE414687B (fr) |
| ZA (1) | ZA777294B (fr) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3334243A1 (de) * | 1983-09-22 | 1985-04-04 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Kapazitiver, komplexer widerstand |
| US4766395A (en) * | 1985-10-15 | 1988-08-23 | Dolby Ray Milton | Circuits to provide desired conductance characteristics using a FET |
| US4786879A (en) * | 1986-03-03 | 1988-11-22 | Dolby Ray Milton | Attenuator circuit employing bootstrapping |
| US4888810A (en) * | 1987-08-05 | 1989-12-19 | Argosy Electronics | Analog volume control circuit |
| US4855685A (en) * | 1987-09-30 | 1989-08-08 | Texas Instruments Incorporated | Precision switchable gain circuit |
| US5479123A (en) * | 1993-06-18 | 1995-12-26 | Digital Equipment Corporation | Externally programmable integrated bus terminator for optimizing system bus performance |
| US5583464A (en) * | 1994-05-13 | 1996-12-10 | Thinking Machines Corporation | Resistor circuit for integrated circuit chip using insulated field effect transistors |
| DE10226031A1 (de) * | 2002-06-12 | 2003-12-24 | Bosch Gmbh Robert | Schaltregler, insbesondere Abwärtswandler, und Schaltregelverfahren |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3412340A (en) * | 1966-03-03 | 1968-11-19 | Bendix Corp | Variable attenuation circuit |
| US3539826A (en) * | 1967-09-01 | 1970-11-10 | Ibm | Active variable impedance device for large signal applications |
| GB1228412A (fr) * | 1968-03-05 | 1971-04-15 | ||
| US3621284A (en) * | 1970-12-07 | 1971-11-16 | Sylvania Electric Prod | Attenuation circuit |
| IT995990B (it) * | 1973-10-19 | 1975-11-20 | Ates Componenti Elettron | Attenuatore attivo a minima distorsione armonica totale per amplificatori in alternata con controllo automatico del livello d uscita |
| US4001735A (en) * | 1975-11-20 | 1977-01-04 | Northern Electric Company Limited | Single amplifier immittance network |
-
1976
- 1976-12-07 DE DE2655320A patent/DE2655320C3/de not_active Expired
-
1977
- 1977-11-30 SE SE7713576A patent/SE414687B/sv not_active IP Right Cessation
- 1977-12-03 JP JP14562877A patent/JPS5383554A/ja active Granted
- 1977-12-05 FR FR7736483A patent/FR2373916A1/fr active Granted
- 1977-12-06 AT AT872677A patent/AT358100B/de not_active IP Right Cessation
- 1977-12-06 IL IL53551A patent/IL53551A/xx unknown
- 1977-12-06 CH CH1491677A patent/CH622138A5/de not_active IP Right Cessation
- 1977-12-07 ZA ZA00777294A patent/ZA777294B/xx unknown
- 1977-12-07 GB GB50897/77A patent/GB1590038A/en not_active Expired
- 1977-12-07 CA CA292,572A patent/CA1089038A/fr not_active Expired
- 1977-12-07 US US05/858,266 patent/US4137466A/en not_active Expired - Lifetime
- 1977-12-07 BE BE183224A patent/BE861574A/fr not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE2655320A1 (de) | 1978-06-08 |
| SE7713576L (sv) | 1978-06-08 |
| JPH0137885B2 (fr) | 1989-08-10 |
| CH622138A5 (fr) | 1981-03-13 |
| ATA872677A (de) | 1980-01-15 |
| CA1089038A (fr) | 1980-11-04 |
| DE2655320C3 (de) | 1987-02-12 |
| DE2655320B2 (de) | 1979-02-01 |
| SE414687B (sv) | 1980-08-11 |
| IL53551A0 (en) | 1978-03-10 |
| JPS5383554A (en) | 1978-07-24 |
| FR2373916A1 (fr) | 1978-07-07 |
| AT358100B (de) | 1980-08-25 |
| GB1590038A (en) | 1981-05-28 |
| IL53551A (en) | 1980-01-31 |
| US4137466A (en) | 1979-01-30 |
| BE861574A (fr) | 1978-03-31 |
| FR2373916B1 (fr) | 1984-08-17 |
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