ES264615A1 - Improvements in or relating to circuit arrangements for television receivers - Google Patents
Improvements in or relating to circuit arrangements for television receiversInfo
- Publication number
- ES264615A1 ES264615A1 ES0264615A ES264615A ES264615A1 ES 264615 A1 ES264615 A1 ES 264615A1 ES 0264615 A ES0264615 A ES 0264615A ES 264615 A ES264615 A ES 264615A ES 264615 A1 ES264615 A1 ES 264615A1
- Authority
- ES
- Spain
- Prior art keywords
- resistance
- receiver
- discharge valve
- galvanically
- voltage
- 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
- H04N5/57—Control of contrast or brightness
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Receiver Circuits (AREA)
- Details Of Television Scanning (AREA)
Abstract
A circuit arrangement for use in a television receiver to maintain constant contrast and brightness of a television image reproduced by means of a picture tube as the supply voltage fluctuates for the receiver, at whose arrangement the anode of a valve video output is galvanically connected on the one hand to a picture or display tube control electrode and on the other hand to a discharge valve control electrode, which supplies the automatic gain control voltage at the receiver, characterized in that the negative bias voltage for both the picture tube and the discharge valve is obtained from a potentiometric circuit that is connected to the same supply voltage as the video output valve, whose potentiometric circuit consists of the combination in series of two resistors, one of which is provided with a galvanically variable tap connected with a second electrode of control of the picture tube, while, in parallel with the last resistance, the series combination of a third resistance and a resistive element is connected that has a symmetrical and non-linear voltage-intensity characteristic curve and because the union of the Third resistance and resistive element is galvanically connected to a second discharge valve control electrode. (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL248132A NL248132A (en) | 1960-02-06 | 1960-02-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES264615A1 true ES264615A1 (en) | 1961-08-01 |
Family
ID=19752162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES0264615A Expired ES264615A1 (en) | 1960-02-06 | 1961-02-02 | Improvements in or relating to circuit arrangements for television receivers |
Country Status (5)
| Country | Link |
|---|---|
| CH (1) | CH400229A (en) |
| ES (1) | ES264615A1 (en) |
| FR (1) | FR1280252A (en) |
| GB (1) | GB898913A (en) |
| NL (1) | NL248132A (en) |
-
1960
- 1960-02-06 NL NL248132A patent/NL248132A/xx unknown
-
1961
- 1961-02-02 ES ES0264615A patent/ES264615A1/en not_active Expired
- 1961-02-03 GB GB4155/61A patent/GB898913A/en not_active Expired
- 1961-02-03 CH CH131861A patent/CH400229A/en unknown
- 1961-02-06 FR FR851775A patent/FR1280252A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH400229A (en) | 1965-10-15 |
| GB898913A (en) | 1962-06-14 |
| FR1280252A (en) | 1961-12-29 |
| NL248132A (en) | 1964-03-10 |
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