JPS5784681A - Vertical deflection circuit - Google Patents
Vertical deflection circuitInfo
- Publication number
- JPS5784681A JPS5784681A JP16218580A JP16218580A JPS5784681A JP S5784681 A JPS5784681 A JP S5784681A JP 16218580 A JP16218580 A JP 16218580A JP 16218580 A JP16218580 A JP 16218580A JP S5784681 A JPS5784681 A JP S5784681A
- Authority
- JP
- Japan
- Prior art keywords
- saw tooth
- synchronizing signal
- voltage
- vertical synchronizing
- capacitor
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
- H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
- H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Television Scanning (AREA)
Abstract
PURPOSE:To enable to keep the screen size displayed on the tube surface of a cathode ray tube constant, by generating a saw tooth wave corresponding to the period of an inputted vertical synchronizing signal. CONSTITUTION:A vertical synchronizing signal is inputted to the base of a transistor (TR) 8. A DC voltage proportional to the period of the vertical synchronizing signal is produced at the collector of the TR8 with an integration circuit consisting of the TR8 of switching operation, resistor 9 and capacitor 10, and a saw tooth control voltage corresponding to the DC voltage is generated to the output of a peak hold circuit consisting of a capacitor 22, diode 21 and buffer amplifier 11. A collector current corresponding to a saw tooth control voltage flows to the collector of a TR16, and a current inversely corresponding to the saw tooth control voltage flows to a capacitor 18. The slope of the saw tooth voltage changes corresponding to the period of the vertical synchronizing signal and the peak voltage can be made constant with a TR23.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16218580A JPS5784681A (en) | 1980-11-17 | 1980-11-17 | Vertical deflection circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16218580A JPS5784681A (en) | 1980-11-17 | 1980-11-17 | Vertical deflection circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5784681A true JPS5784681A (en) | 1982-05-27 |
Family
ID=15749619
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16218580A Pending JPS5784681A (en) | 1980-11-17 | 1980-11-17 | Vertical deflection circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5784681A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0242123A2 (en) * | 1986-04-11 | 1987-10-21 | RCA Thomson Licensing Corporation | Television deflection apparatus |
JPS6318871A (en) * | 1986-07-11 | 1988-01-26 | Nec Home Electronics Ltd | Vertical deflecting circuit |
JPS6318872A (en) * | 1986-07-11 | 1988-01-26 | Nec Home Electronics Ltd | Vertical deflecting circuit |
JPS63157570A (en) * | 1986-12-20 | 1988-06-30 | Nec Home Electronics Ltd | Vertical deflection circuit |
-
1980
- 1980-11-17 JP JP16218580A patent/JPS5784681A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0242123A2 (en) * | 1986-04-11 | 1987-10-21 | RCA Thomson Licensing Corporation | Television deflection apparatus |
JPS6318871A (en) * | 1986-07-11 | 1988-01-26 | Nec Home Electronics Ltd | Vertical deflecting circuit |
JPS6318872A (en) * | 1986-07-11 | 1988-01-26 | Nec Home Electronics Ltd | Vertical deflecting circuit |
JPS63157570A (en) * | 1986-12-20 | 1988-06-30 | Nec Home Electronics Ltd | Vertical deflection circuit |
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