DE3688174T2 - Klemmschaltung fuer einen analog-zu-digital-wandler. - Google Patents
Klemmschaltung fuer einen analog-zu-digital-wandler.Info
- Publication number
- DE3688174T2 DE3688174T2 DE8686308073T DE3688174T DE3688174T2 DE 3688174 T2 DE3688174 T2 DE 3688174T2 DE 8686308073 T DE8686308073 T DE 8686308073T DE 3688174 T DE3688174 T DE 3688174T DE 3688174 T2 DE3688174 T2 DE 3688174T2
- Authority
- DE
- Germany
- Prior art keywords
- comparator
- output
- signal
- threshold
- adc
- Prior art date
- 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 - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/16—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level
- H04N5/18—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit
- H04N5/185—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit for the black level
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/124—Sampling or signal conditioning arrangements specially adapted for A/D converters
- H03M1/129—Means for adapting the input signal to the range the converter can handle, e.g. limiting, pre-scaling ; Out-of-range indication
- H03M1/1295—Clamping, i.e. adjusting the DC level of the input signal to a predetermined value
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/14—Conversion in steps with each step involving the same or a different conversion means and delivering more than one bit
- H03M1/16—Conversion in steps with each step involving the same or a different conversion means and delivering more than one bit with scale factor modification, i.e. by changing the amplification between the steps
- H03M1/164—Conversion in steps with each step involving the same or a different conversion means and delivering more than one bit with scale factor modification, i.e. by changing the amplification between the steps the steps being performed sequentially in series-connected stages
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB858525861A GB8525861D0 (en) | 1985-10-21 | 1985-10-21 | Clamping circuit |
GB08611863A GB2181912B (en) | 1985-10-21 | 1986-05-15 | A clamping circuit for an analogue to digital converter |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3688174D1 DE3688174D1 (de) | 1993-05-06 |
DE3688174T2 true DE3688174T2 (de) | 1993-09-02 |
Family
ID=26289911
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8686308073T Expired - Fee Related DE3688174T2 (de) | 1985-10-21 | 1986-10-17 | Klemmschaltung fuer einen analog-zu-digital-wandler. |
Country Status (5)
Country | Link |
---|---|
US (1) | US4811016A (de) |
EP (1) | EP0220894B1 (de) |
AT (1) | ATE87786T1 (de) |
DE (1) | DE3688174T2 (de) |
ES (1) | ES2039353T3 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0360918A1 (de) * | 1988-09-30 | 1990-04-04 | Computer Gesellschaft Konstanz Mbh | Schaltungsanordnung zur Klemmung von in einer Videosignalfolge enthaltenen Schwarzwert-Referenz-signale |
JP2519804B2 (ja) * | 1989-09-07 | 1996-07-31 | 株式会社東芝 | 映像信号遅延回路 |
EP0473375B1 (de) * | 1990-08-30 | 1998-10-28 | Canon Kabushiki Kaisha | Bildsignalverarbeitung |
US5084700A (en) * | 1991-02-04 | 1992-01-28 | Thomson Consumer Electronics, Inc. | Signal clamp circuitry for analog-to-digital converters |
DE4130338A1 (de) * | 1991-09-12 | 1993-03-18 | Thomson Brandt Gmbh | Schaltung mit einem a/d-wandler- oder d/a-wandler |
FR2727595A1 (fr) * | 1994-11-25 | 1996-05-31 | Sgs Thomson Microelectronics | Circuit d'asservissement d'un signal sur une valeur de preference |
US7317480B1 (en) * | 2000-10-30 | 2008-01-08 | Micron Technology, Inc. | Imaging apparatus providing black level compensation of a successive approximation A/D converter |
JP3918635B2 (ja) * | 2002-05-30 | 2007-05-23 | ソニー株式会社 | 直流レベル制御方法、クランプ回路、撮像装置 |
US7106231B2 (en) * | 2003-11-04 | 2006-09-12 | Mstar Semiconductor, Inc. | Video signal processing system including analog to digital converter and related method for calibrating analog to digital converter |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3541315A (en) * | 1967-04-13 | 1970-11-17 | Singer General Precision | Analog-to-digital cyclic forward feed conversion equipment |
JPS4916363A (de) * | 1972-05-18 | 1974-02-13 | ||
GB1426766A (en) * | 1973-09-29 | 1976-03-03 | Solartron Electronic Group | Analogue to digital converters |
JPS558051B2 (de) * | 1974-11-06 | 1980-03-01 | ||
JPS5225556A (en) * | 1975-08-22 | 1977-02-25 | Hitachi Ltd | Analog digital converter |
US4513278A (en) * | 1977-09-26 | 1985-04-23 | Burroughs Corporation | Video Synthesizer for a digital video display system employing a plurality of grayscale levels displayed in discrete steps of luminance |
DE2743161C2 (de) * | 1977-09-26 | 1985-08-22 | Robert Bosch Gmbh, 7000 Stuttgart | Analog-Digital-Wandler |
GB2105547A (en) * | 1981-09-11 | 1983-03-23 | Philips Electronic Associated | Clamping video signals |
JPS58124373A (ja) * | 1982-01-21 | 1983-07-23 | Nippon Hoso Kyokai <Nhk> | 信号クランプ方式 |
FR2524748A1 (fr) * | 1982-04-02 | 1983-10-07 | Thomson Csf | Circuit numerique d'alignement de niveau d'un signal analogique |
-
1986
- 1986-10-17 DE DE8686308073T patent/DE3688174T2/de not_active Expired - Fee Related
- 1986-10-17 EP EP86308073A patent/EP0220894B1/de not_active Expired - Lifetime
- 1986-10-17 AT AT86308073T patent/ATE87786T1/de active
- 1986-10-17 ES ES198686308073T patent/ES2039353T3/es not_active Expired - Lifetime
- 1986-10-21 US US06/921,593 patent/US4811016A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0220894A3 (en) | 1988-09-07 |
DE3688174D1 (de) | 1993-05-06 |
US4811016A (en) | 1989-03-07 |
EP0220894B1 (de) | 1993-03-31 |
ES2039353T3 (es) | 1993-10-01 |
EP0220894A2 (de) | 1987-05-06 |
ATE87786T1 (de) | 1993-04-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: CINTEL INTERNATIONAL LTD., MANCHESTER, GB |
|
8339 | Ceased/non-payment of the annual fee |