GB1503982A - Gain control circuit - Google Patents
Gain control circuitInfo
- Publication number
- GB1503982A GB1503982A GB9052/75A GB905275A GB1503982A GB 1503982 A GB1503982 A GB 1503982A GB 9052/75 A GB9052/75 A GB 9052/75A GB 905275 A GB905275 A GB 905275A GB 1503982 A GB1503982 A GB 1503982A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gain control
- march
- fet
- control circuit
- gain
- 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
- 239000004065 semiconductor Substances 0.000 abstract 2
- 230000010363 phase shift Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/68—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
1503982 Gain control circuits INDESIT INDUSTRIA ELETTRODOMESTICI ITALIANA SpA 5 March 1975 [8 March 1974] 9052/75 Heading H4R The gain of a semi-conductor 22 is controlled by varying the resistance of an FET 27 in a series D.C. path with a resistor 25, <SP>.</SP>26 between the semiconductor's common electrode and a reference point. The circuit minimizes phase shifts in colour subcarrier frequency TV signals. FET control is effected by comparison at 29 of a threshold voltage set by 31, 32 and the detected 35 output of amplifier 43.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT67649/74A IT1009241B (en) | 1974-03-08 | 1974-03-08 | CIRCUIT FOR THE CONTROL OF THE DAGNO GUA |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1503982A true GB1503982A (en) | 1978-03-15 |
Family
ID=11304208
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9052/75A Expired GB1503982A (en) | 1974-03-08 | 1975-03-05 | Gain control circuit |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE2509981A1 (en) |
GB (1) | GB1503982A (en) |
IT (1) | IT1009241B (en) |
NL (1) | NL7502766A (en) |
-
1974
- 1974-03-08 IT IT67649/74A patent/IT1009241B/en active
-
1975
- 1975-03-05 GB GB9052/75A patent/GB1503982A/en not_active Expired
- 1975-03-07 DE DE19752509981 patent/DE2509981A1/en not_active Withdrawn
- 1975-03-07 NL NL7502766A patent/NL7502766A/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
IT1009241B (en) | 1976-12-10 |
DE2509981A1 (en) | 1975-09-11 |
NL7502766A (en) | 1975-09-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |