GB1355615A - Negative feedback clamping circuit for a television signal - Google Patents
Negative feedback clamping circuit for a television signalInfo
- Publication number
- GB1355615A GB1355615A GB1671272A GB1671272A GB1355615A GB 1355615 A GB1355615 A GB 1355615A GB 1671272 A GB1671272 A GB 1671272A GB 1671272 A GB1671272 A GB 1671272A GB 1355615 A GB1355615 A GB 1355615A
- Authority
- GB
- United Kingdom
- Prior art keywords
- negative feedback
- clamping circuit
- television signal
- television
- clamping
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Picture Signal Circuits (AREA)
- Television Receiver Circuits (AREA)
Abstract
1355615 Television THOMSON-CSF 11 April 1972 [13 April 1971] 16712/72 Heading H4F In a television clamping circuit in which the video signal (a), Fig. 2, at the output of detector 3 is sampled during the horizontal blanking periods and the resulting samples (b), after inversion (e), used in a clamping switch 7 and capacitor C 2 , the need for a large negative feedback amplificator factor, with the resulting in- stability, is overcome by extending in means 5 each sample level from when the original sample ceased till the commencement of the original next sample (c). This signal, after integration at 6 provides the clamping reference signal (d).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7112968A FR2133461B1 (en) | 1971-04-13 | 1971-04-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1355615A true GB1355615A (en) | 1974-06-05 |
Family
ID=9075183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1671272A Expired GB1355615A (en) | 1971-04-13 | 1972-04-11 | Negative feedback clamping circuit for a television signal |
Country Status (7)
| Country | Link |
|---|---|
| DE (1) | DE2217938B2 (en) |
| FR (1) | FR2133461B1 (en) |
| GB (1) | GB1355615A (en) |
| IT (1) | IT957619B (en) |
| NL (1) | NL7204813A (en) |
| NO (1) | NO133246C (en) |
| SE (1) | SE368498B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3607164A1 (en) * | 1986-03-05 | 1987-09-10 | Grundig Emv | CIRCUIT FOR COMPENSATING INTERFERENCE CALLED INTERFERENCE IN SATELLITE TELEVISION RECEIVERS |
| FR2670068A1 (en) * | 1990-11-30 | 1992-06-05 | Philips Electronics Nv | ALIGNMENT DEVICE FOR BASEBAND SIGNAL. |
-
1971
- 1971-04-13 FR FR7112968A patent/FR2133461B1/fr not_active Expired
-
1972
- 1972-04-11 GB GB1671272A patent/GB1355615A/en not_active Expired
- 1972-04-11 IT IT4952072A patent/IT957619B/en active
- 1972-04-11 NO NO124172A patent/NO133246C/no unknown
- 1972-04-11 NL NL7204813A patent/NL7204813A/xx not_active Application Discontinuation
- 1972-04-12 SE SE474272A patent/SE368498B/xx unknown
- 1972-04-13 DE DE19722217938 patent/DE2217938B2/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE2217938A1 (en) | 1972-10-19 |
| SE368498B (en) | 1974-07-01 |
| IT957619B (en) | 1973-10-20 |
| FR2133461B1 (en) | 1975-04-18 |
| NO133246B (en) | 1975-12-22 |
| FR2133461A1 (en) | 1972-12-01 |
| DE2217938B2 (en) | 1980-07-24 |
| NO133246C (en) | 1976-03-31 |
| NL7204813A (en) | 1972-10-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |