GB412126A - Improvements in or relating to television and like apparatus - Google Patents
Improvements in or relating to television and like apparatusInfo
- Publication number
- GB412126A GB412126A GB36044/33A GB3604433A GB412126A GB 412126 A GB412126 A GB 412126A GB 36044/33 A GB36044/33 A GB 36044/33A GB 3604433 A GB3604433 A GB 3604433A GB 412126 A GB412126 A GB 412126A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valves
- amplifying
- valve
- currents
- resistances
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Amplifiers (AREA)
Abstract
412,126. Valve amplifying circuits. FERNSEH AKT.-GES., Goerzallee, Zehlendorf, Berlin. Dec. 21, 1933, No. 36044. Convention date, Dec. 23, 1932. [Class 40 (v).] The modulation range of a television transmitter is constant whatever the contrast or mean brightness in the object. Two valves 10, 11, auxiliary to the amplifying-valves 2 .. 5, are biassed to the peak valves of the photoelectric currents above and below the mean value respectively, by charging condensers 14, 15, shunted by resistances 16, 17, from the signal currents through rectifiers 12, 13, for example thermionic valves. The anode currents of the valves 10, 11 pass respectively through resistances 7, 8 in series in the grid circuit of the amplifying-valve 4 of variable-mu type. Alternatively the anode potential of the amplifying-valve is varied.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE412126X | 1932-12-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB412126A true GB412126A (en) | 1934-06-21 |
Family
ID=6434883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB36044/33A Expired GB412126A (en) | 1932-12-23 | 1933-12-21 | Improvements in or relating to television and like apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB412126A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2760008A (en) * | 1950-08-30 | 1956-08-21 | Rca Corp | Amplifier having controllable signal expansion and compression characteristics |
-
1933
- 1933-12-21 GB GB36044/33A patent/GB412126A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2760008A (en) * | 1950-08-30 | 1956-08-21 | Rca Corp | Amplifier having controllable signal expansion and compression characteristics |
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