JPS5595463A - Power circuit for starting horizontal oscillation - Google Patents
Power circuit for starting horizontal oscillationInfo
- Publication number
- JPS5595463A JPS5595463A JP531879A JP531879A JPS5595463A JP S5595463 A JPS5595463 A JP S5595463A JP 531879 A JP531879 A JP 531879A JP 531879 A JP531879 A JP 531879A JP S5595463 A JPS5595463 A JP S5595463A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- potential
- voltage
- point
- horizontal oscillation
- 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.)
- Granted
Links
Landscapes
- Details Of Television Scanning (AREA)
Abstract
PURPOSE:To make it possible to start horizontal oscillation even when an AC voltage increases gradually, by actuating a horizontal driver circuit by making use of a blocking oscillation output. CONSTITUTION:To point B, a DC voltage is applied by resistance R1 and capacitor C4, and transistor Q1 is applied at its base with a constant voltage divided by resistances R2 and R3. In the beginning when the DC voltage is applied from point B via capacitor C5, the emitter potential of Q1 is equal to a potential at point B, but once capacitor C5 is charged with the time constant of resistance R4 and capacitor C5, it falls gradually by a value equivalent to the charge. With the emitter potential of Q1 decreases below the base potential, Q1 conducts to flow a collector current through the primary winding of transformer T5, and it is positively fed back via capacitor C6, so that Q1 will momentarily be saturated to charge capacitor C5 via Q1. With capacitor C5 charged, the emitter potential of Q1 increases up to the potential of point B and Q1 turns OFF. Although this operation is repeated, a voltage induced across the secondary winding of transformer T5 is rectified and smoothed by diode D1 and capacitor C1 and then supplied as the starting power supply of horizontal oscillation driver circuit 3.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP531879A JPS5595463A (en) | 1979-01-13 | 1979-01-13 | Power circuit for starting horizontal oscillation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP531879A JPS5595463A (en) | 1979-01-13 | 1979-01-13 | Power circuit for starting horizontal oscillation |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5595463A true JPS5595463A (en) | 1980-07-19 |
JPS6244460B2 JPS6244460B2 (en) | 1987-09-21 |
Family
ID=11607899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP531879A Granted JPS5595463A (en) | 1979-01-13 | 1979-01-13 | Power circuit for starting horizontal oscillation |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5595463A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5398724A (en) * | 1977-02-09 | 1978-08-29 | Matsushita Electric Ind Co Ltd | Driving unit for television receiver |
-
1979
- 1979-01-13 JP JP531879A patent/JPS5595463A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5398724A (en) * | 1977-02-09 | 1978-08-29 | Matsushita Electric Ind Co Ltd | Driving unit for television receiver |
Also Published As
Publication number | Publication date |
---|---|
JPS6244460B2 (en) | 1987-09-21 |
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