FR2220925B1 - - Google Patents
Info
- Publication number
- FR2220925B1 FR2220925B1 FR7306904A FR7306904A FR2220925B1 FR 2220925 B1 FR2220925 B1 FR 2220925B1 FR 7306904 A FR7306904 A FR 7306904A FR 7306904 A FR7306904 A FR 7306904A FR 2220925 B1 FR2220925 B1 FR 2220925B1
- 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
-
- 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)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Amplifiers (AREA)
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7306904A FR2220925B1 (US06653308-20031125-C00199.png) | 1973-02-27 | 1973-02-27 | |
| US444660A US3921008A (en) | 1973-02-27 | 1974-02-21 | Wide dynamic range logarithmic amplifier arrangement |
| NLAANVRAGE7402433,A NL174996C (nl) | 1973-02-27 | 1974-02-22 | Logaritmische versterkerschakeling met grote dynamiek en brede band, in het bijzonder voor de versterking van signalen in het videofrekwentiegebied. |
| GB870074A GB1437565A (en) | 1973-02-27 | 1974-02-26 | Wide dynamic range logarithmic amplifier arrangement |
| JP2244274A JPS5717373B2 (US06653308-20031125-C00199.png) | 1973-02-27 | 1974-02-27 | |
| DE2409340A DE2409340C2 (de) | 1973-02-27 | 1974-02-27 | Logarithmische Verstärkerschaltungsanordnung |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7306904A FR2220925B1 (US06653308-20031125-C00199.png) | 1973-02-27 | 1973-02-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2220925A1 FR2220925A1 (US06653308-20031125-C00199.png) | 1974-10-04 |
| FR2220925B1 true FR2220925B1 (US06653308-20031125-C00199.png) | 1976-04-30 |
Family
ID=9115466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7306904A Expired FR2220925B1 (US06653308-20031125-C00199.png) | 1973-02-27 | 1973-02-27 |
Country Status (6)
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4349755A (en) * | 1980-02-11 | 1982-09-14 | National Semiconductor Corporation | Current product limit detector |
| US4535256A (en) * | 1983-04-26 | 1985-08-13 | Zenith Electronics Corporation | Integrated video amp with common base lateral PNP transistor |
| US4536663A (en) * | 1983-07-01 | 1985-08-20 | Motorola, Inc. | Comparator circuit having full supply common mode input |
| US4628357A (en) * | 1984-02-10 | 1986-12-09 | Elscint, Ltd. | Digital fluorographic systems |
| US4716316A (en) * | 1985-02-04 | 1987-12-29 | Varian Associates, Inc. | Full wave, self-detecting differential logarithmic rf amplifier |
| JPH0748624B2 (ja) * | 1988-06-20 | 1995-05-24 | 三菱電機株式会社 | 対数増幅器 |
| JPH0671186B2 (ja) * | 1990-01-19 | 1994-09-07 | 株式会社東芝 | 対数増幅回路 |
| US5414313A (en) * | 1993-02-10 | 1995-05-09 | Watkins Johnson Company | Dual-mode logarithmic amplifier having cascaded stages |
| AU2001232600A1 (en) * | 2000-02-25 | 2001-09-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Photodiode bias circuit |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3237028A (en) * | 1963-02-21 | 1966-02-22 | James F Gibbons | Logarithmic transfer circuit |
| US3369128A (en) * | 1964-02-10 | 1968-02-13 | Nexus Res Lab Inc | Logarithmic function generator |
| US3417263A (en) * | 1965-03-18 | 1968-12-17 | Ansitron Inc | Logarithmic amplifier |
| US3448289A (en) * | 1966-05-20 | 1969-06-03 | Us Navy | Logarthmic amplifier |
| US3584232A (en) * | 1969-01-21 | 1971-06-08 | Bell Telephone Labor Inc | Precision logarithmic converter |
| US3624409A (en) * | 1970-09-03 | 1971-11-30 | Hewlett Packard Co | Logarithmic converter |
| US3790819A (en) * | 1972-03-17 | 1974-02-05 | Perkin Elmer Corp | Log amplifier apparatus |
-
1973
- 1973-02-27 FR FR7306904A patent/FR2220925B1/fr not_active Expired
-
1974
- 1974-02-21 US US444660A patent/US3921008A/en not_active Expired - Lifetime
- 1974-02-22 NL NLAANVRAGE7402433,A patent/NL174996C/xx not_active Application Discontinuation
- 1974-02-26 GB GB870074A patent/GB1437565A/en not_active Expired
- 1974-02-27 JP JP2244274A patent/JPS5717373B2/ja not_active Expired
- 1974-02-27 DE DE2409340A patent/DE2409340C2/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5717373B2 (US06653308-20031125-C00199.png) | 1982-04-10 |
| US3921008A (en) | 1975-11-18 |
| GB1437565A (en) | 1976-05-26 |
| DE2409340C2 (de) | 1983-01-20 |
| NL7402433A (US06653308-20031125-C00199.png) | 1974-08-29 |
| DE2409340A1 (de) | 1974-08-29 |
| NL174996C (nl) | 1984-09-03 |
| FR2220925A1 (US06653308-20031125-C00199.png) | 1974-10-04 |
| JPS502848A (US06653308-20031125-C00199.png) | 1975-01-13 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |