GB1038292A - Automatic control circuit of television receivers - Google Patents
Automatic control circuit of television receiversInfo
- Publication number
- GB1038292A GB1038292A GB2502863A GB2502863A GB1038292A GB 1038292 A GB1038292 A GB 1038292A GB 2502863 A GB2502863 A GB 2502863A GB 2502863 A GB2502863 A GB 2502863A GB 1038292 A GB1038292 A GB 1038292A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplifier
- signal
- automatic
- control
- output
- 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
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/52—Automatic gain control
- H04N5/53—Keyed automatic gain control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/50—Tuning indicators; Automatic tuning control
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Receiver Circuits (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
1,038,292. Automatic frequency and gain control. SONY CORPORATION. June 24, 1963 [June 25, 1962], No. 25028/63. Headings H3A and H3Q. In an automatic gain control or automatic frequency control arrangement for a television receiver, the output of the last I.F. stage 8 of the receiver is coupled via coils 12a, 12c to an amplifier 26 tuned to the intermediate frequency which only amplifies the synchronizing signal portions of the I.F. signal; for automatic gain control the output of the amplifier is applied to a detector 37 which provides a D.C. signal for controlling the gain of the R.F. and I.F. amplifier circuits 2, 6 and 7 and for automatic frequency control the output of the amplifier is applied to a discriminator (not shown) which provides a D.C. control signal for controlling the frequency of the local oscillator 4. The amplifier may operate in class B or C whereby only the large amplitude synchronizing portions of the I.F. signal are amplified or may derive its power supply from a frame scanning coil 24 via pick-up loop 31 so that the amplifier is gated during the synchronizing signal portions of the I.F. signal.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2646762 | 1962-06-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1038292A true GB1038292A (en) | 1966-08-10 |
Family
ID=12194306
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2502863A Expired GB1038292A (en) | 1962-06-25 | 1963-06-24 | Automatic control circuit of television receivers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1038292A (en) |
-
1963
- 1963-06-24 GB GB2502863A patent/GB1038292A/en not_active Expired
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