GB520824A - Improvements relating to saw-tooth electric oscillation generators - Google Patents
Improvements relating to saw-tooth electric oscillation generatorsInfo
- Publication number
- GB520824A GB520824A GB266040A GB266040A GB520824A GB 520824 A GB520824 A GB 520824A GB 266040 A GB266040 A GB 266040A GB 266040 A GB266040 A GB 266040A GB 520824 A GB520824 A GB 520824A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- saw
- condenser
- resistance
- flyback
- 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
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K4/00—Generating pulses having essentially a finite slope or stepped portions
- H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
- H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
- H03K4/10—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only
- H03K4/26—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor
- H03K4/39—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor using a tube operating as an amplifier
- H03K4/43—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor using a tube operating as an amplifier combined with means for generating the driving pulses
Landscapes
- Details Of Television Scanning (AREA)
Abstract
520,824. Valve generating circuits. COSSOR, Ltd., A. C., BEDFORD, L. H., JOFEH, L., and STEVENS, W. H. May 10, 1938, No. 2660/40. Divided out of 519,668. [Class 40 (v)] Relates to an oscillation generator in which a saw-tooth voltage is developed across a condenser, the rapid charge or discharge of which, at flyback in the case of television scanning, is effected by a thermionic valve, and in which the saw-tooth voltage is applied to the grid of an output valve. The output valve supplies a saw-tooth current to an inductive load, a resistance being included in series with the discharge valve and so arranged that during flyback the potential drop in this resistance is superimposed upon the condenser voltage. In this way the current through the valve is cut off throughout the highly positive excursion of its anode at flyback. The Figure shows a condenser C 1 charged through resistance R 1 and discharged by a valve V 2 in series with resistance R 2 . A feedback coupling through condenser C 3 ensures that the discharge valve V 2 is held open throughout the high potential excursion of the anode of the valve V 1 . Synchronizing signals may be applied at the point Sn and are amplified by the valve V 1 and applied to the grid of the valve V 2 by the feedback coupling as positive pulses.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB266040A GB520824A (en) | 1938-05-10 | 1938-05-10 | Improvements relating to saw-tooth electric oscillation generators |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB266040A GB520824A (en) | 1938-05-10 | 1938-05-10 | Improvements relating to saw-tooth electric oscillation generators |
Publications (1)
Publication Number | Publication Date |
---|---|
GB520824A true GB520824A (en) | 1940-05-03 |
Family
ID=9743505
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB266040A Expired GB520824A (en) | 1938-05-10 | 1938-05-10 | Improvements relating to saw-tooth electric oscillation generators |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB520824A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1012708B (en) * | 1952-06-11 | 1957-07-25 | Telefunken Gmbh | Circuit for generating a saw tooth-shaped current |
-
1938
- 1938-05-10 GB GB266040A patent/GB520824A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1012708B (en) * | 1952-06-11 | 1957-07-25 | Telefunken Gmbh | Circuit for generating a saw tooth-shaped current |
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