GB464492A - Method and arrangement for regulation of television receivers - Google Patents
Method and arrangement for regulation of television receiversInfo
- Publication number
- GB464492A GB464492A GB34103/35A GB3410335A GB464492A GB 464492 A GB464492 A GB 464492A GB 34103/35 A GB34103/35 A GB 34103/35A GB 3410335 A GB3410335 A GB 3410335A GB 464492 A GB464492 A GB 464492A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rectifier
- frequency
- dec
- synchronizing
- lead
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Circuits Of Receivers In General (AREA)
- Picture Signal Circuits (AREA)
Abstract
464,492. Wireless receiving-apparatus. RADIOAKT.-GES. D. S. LOEWE. Dec. 9, 1935, No. 34103. Convention date, Dec. 10, 1934. [Class 40 (v)] Automatic gain control in a television receiver is effected by a special rectifier 13 independent of the usual rectifier 5 and amplitude filter 9. The rectifier 13 is excited by the synchronizing signal detected by the rectifier 5. The rectifier 13 is coupled to a lead 7 carrying the image potentials by a capacitative or inductive coupling which is preferably tuned to the synchronizing frequency and transmits no direct-current component so that the excitation of the rectifier 13 varies with the received field strength. The coupling may consist of a condenser 14 and resistance 15 of such a magnitude that detrimental capacities in the regulating rectifier do not affect the high-frequency potentials in the lead 7. A bias 17 on the circuit of the rectifier delays the initiation of the controlling action and is adjusted by varying the resistance 16 to produce the desired strength of reception. The detector 5 for the intermediate-frequency amplifier 2 is in the same bulb as, and directly coupled with, the filter 9 for separating the synchronizing signals, and the regulating rectifier is a separate valve, crystal detector, or contact rectifier. Specification 464,483 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE464492X | 1934-12-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB464492A true GB464492A (en) | 1937-04-19 |
Family
ID=6540266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB34103/35A Expired GB464492A (en) | 1934-12-10 | 1935-12-09 | Method and arrangement for regulation of television receivers |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2227001A (en) |
| BE (1) | BE412678A (en) |
| FR (1) | FR46823E (en) |
| GB (1) | GB464492A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2481045A (en) * | 1945-03-12 | 1949-09-06 | Rca Corp | Automatic volume control and sync separator for television receivers |
| US2554317A (en) * | 1946-12-18 | 1951-05-22 | Rca Corp | Clamp circuit |
| BE486285A (en) * | 1947-12-13 | |||
| US2520012A (en) * | 1948-01-08 | 1950-08-22 | Philco Corp | Negative bias limiter for automatic gain control circuits |
| US2515763A (en) * | 1948-10-22 | 1950-07-18 | Gen Electric | Direct current restoration circuit for television |
| US2800528A (en) * | 1949-06-23 | 1957-07-23 | Du Mont Allen B Lab Inc | Video amplifier bridge circuit for minimizing supply voltage variations |
| US2598929A (en) * | 1949-12-15 | 1952-06-03 | Philco Corp | Direct current reinsertion circuit |
-
0
- BE BE412678D patent/BE412678A/xx unknown
-
1935
- 1935-12-09 GB GB34103/35A patent/GB464492A/en not_active Expired
- 1935-12-09 US US53534A patent/US2227001A/en not_active Expired - Lifetime
- 1935-12-09 FR FR46823D patent/FR46823E/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2227001A (en) | 1940-12-31 |
| FR46823E (en) | 1936-09-12 |
| BE412678A (en) |
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