FR2240574B1 - - Google Patents
Info
- Publication number
- FR2240574B1 FR2240574B1 FR7427792A FR7427792A FR2240574B1 FR 2240574 B1 FR2240574 B1 FR 2240574B1 FR 7427792 A FR7427792 A FR 7427792A FR 7427792 A FR7427792 A FR 7427792A FR 2240574 B1 FR2240574 B1 FR 2240574B1
- Authority
- FR
- France
- 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
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G7/00—Volume compression or expansion in amplifiers
- H03G7/06—Volume compression or expansion in amplifiers having semiconductor devices
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06G—ANALOGUE COMPUTERS
- G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
- G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
- G06G7/24—Arrangements for performing computing operations, e.g. operational amplifiers for evaluating logarithmic or exponential functions, e.g. hyperbolic functions
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Software Systems (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9015173A JPS5646629B2 (fr) | 1973-08-10 | 1973-08-10 | |
| JP9015073A JPS5646182B2 (fr) | 1973-08-10 | 1973-08-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2240574A1 FR2240574A1 (fr) | 1975-03-07 |
| FR2240574B1 true FR2240574B1 (fr) | 1979-03-09 |
Family
ID=26431654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7427792A Expired FR2240574B1 (fr) | 1973-08-10 | 1974-08-09 |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US3935478A (fr) |
| BR (1) | BR7406580D0 (fr) |
| CA (1) | CA1027193A (fr) |
| DE (1) | DE2438472A1 (fr) |
| ES (1) | ES429115A1 (fr) |
| FR (1) | FR2240574B1 (fr) |
| GB (1) | GB1472206A (fr) |
| IT (1) | IT1018899B (fr) |
| NL (1) | NL189537C (fr) |
| SE (1) | SE405782B (fr) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52113339U (fr) * | 1976-02-26 | 1977-08-29 | ||
| US4247789A (en) * | 1978-04-07 | 1981-01-27 | Raytheon Company | Electronic circuitry for multiplying/dividing analog input signals |
| JPS54161253A (en) * | 1978-06-10 | 1979-12-20 | Toshiba Corp | High-frequency amplifier circuit |
| US4329598A (en) * | 1980-04-04 | 1982-05-11 | Dbx, Inc. | Bias generator |
| US4629998A (en) * | 1980-10-23 | 1986-12-16 | Victor Company Of Japan, Limited | Variable gain equalizer with a mirror circuit having opposite phase relationship between input and output currents |
| US4524292A (en) * | 1981-09-24 | 1985-06-18 | Tokyo Shibaura Denki Kabushiki Kaisha | Analog arithmetic operation circuit |
| FR2513833B1 (fr) * | 1981-09-25 | 1986-01-03 | Trt Telecom Radio Electr | Commutateur analogique de courant en technologie bipolaire |
| CA1203628A (fr) * | 1983-01-03 | 1986-04-22 | Barrie Gilbert | Circuit logarithmique a compensation des effets dus a la temperature |
| US4604532A (en) * | 1983-01-03 | 1986-08-05 | Analog Devices, Incorporated | Temperature compensated logarithmic circuit |
| US4589021A (en) * | 1983-01-07 | 1986-05-13 | Sony Corporation | Gamma compensating circuit |
| US4945259A (en) * | 1988-11-10 | 1990-07-31 | Burr-Brown Corporation | Bias voltage generator and method |
| NL9002591A (nl) * | 1990-11-28 | 1992-06-16 | Philips Nv | Versterkerschakeling met temperatuurcompensatie. |
| US5432479A (en) * | 1994-03-31 | 1995-07-11 | U.S. Philips Corporation | D.C. current compensation circuit for a nonlinear amplifier |
| JP3348576B2 (ja) * | 1995-11-10 | 2002-11-20 | ソニー株式会社 | 温度検出装置、これを搭載した半導体素子およびこれを用いたオートフォーカスシステム |
| TW382146B (en) * | 1998-06-19 | 2000-02-11 | United Microeletronics Corp | Semiconductor step-down voltage device having low power consumption |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1265157A (fr) * | 1968-09-27 | 1972-03-01 | ||
| US3689752A (en) * | 1970-04-13 | 1972-09-05 | Tektronix Inc | Four-quadrant multiplier circuit |
-
1974
- 1974-07-29 US US05/492,838 patent/US3935478A/en not_active Expired - Lifetime
- 1974-08-07 GB GB3482674A patent/GB1472206A/en not_active Expired
- 1974-08-09 ES ES429115A patent/ES429115A1/es not_active Expired
- 1974-08-09 IT IT52523/74A patent/IT1018899B/it active
- 1974-08-09 SE SE7410234A patent/SE405782B/xx not_active IP Right Cessation
- 1974-08-09 CA CA206,676A patent/CA1027193A/fr not_active Expired
- 1974-08-09 DE DE2438472A patent/DE2438472A1/de active Granted
- 1974-08-09 FR FR7427792A patent/FR2240574B1/fr not_active Expired
- 1974-08-09 BR BR6580/74A patent/BR7406580D0/pt unknown
- 1974-08-12 NL NLAANVRAGE7410798,A patent/NL189537C/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| FR2240574A1 (fr) | 1975-03-07 |
| GB1472206A (en) | 1977-05-04 |
| AU7193474A (en) | 1976-02-05 |
| SE405782B (sv) | 1978-12-27 |
| ES429115A1 (es) | 1976-09-01 |
| BR7406580D0 (pt) | 1975-05-27 |
| SE7410234L (sv) | 1975-02-11 |
| NL189537B (nl) | 1992-12-01 |
| NL189537C (nl) | 1993-05-03 |
| DE2438472A1 (de) | 1975-03-06 |
| NL7410798A (fr) | 1975-02-12 |
| CA1027193A (fr) | 1978-02-28 |
| DE2438472C2 (fr) | 1989-01-19 |
| US3935478A (en) | 1976-01-27 |
| IT1018899B (it) | 1977-10-20 |