JPS5580961A - Modulator circuit - Google Patents
Modulator circuitInfo
- Publication number
- JPS5580961A JPS5580961A JP15418378A JP15418378A JPS5580961A JP S5580961 A JPS5580961 A JP S5580961A JP 15418378 A JP15418378 A JP 15418378A JP 15418378 A JP15418378 A JP 15418378A JP S5580961 A JPS5580961 A JP S5580961A
- Authority
- JP
- Japan
- Prior art keywords
- tooth wave
- saw
- base
- waveform
- horizontal pulse
- 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
Landscapes
- Details Of Television Scanning (AREA)
Abstract
PURPOSE:To secure the extraction of the steady correction current waveform regardless of some variation of the horizontal pulse duration by modulating the saw- tooth wave of the horizontal period via the saw-tooth wave signal of the vertical period, at the same time securing an assured correction for the keystone distortion. CONSTITUTION:The left-half of the vertical saw-tooth wave is applied to the base of transistor Tr16, and the negative horizontal pulse is applied to the base of Tr25. Thus Tr25 is turned on and then turned off when no negative horizontal pulse is applied. In other words, in the positive left half of the vertical saw-tooth wave voltage, the waveform applied to the base of Tr16 is shwon in the left-half of c; while the waveform applied to the base of Tr16 in the reverse mode is shown in the right-half of c respectively. This waveform c is steady just with a slight reduction of the L1 width as shown by dotted line A even though the pulse duration of the horizontal pulse has some fluctuation. At the same time, vertical saw-tooth wave d is applied to the emitter of Tr16, and add-up wave e is delivered to output terminal 20.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15418378A JPS5580961A (en) | 1978-12-15 | 1978-12-15 | Modulator circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15418378A JPS5580961A (en) | 1978-12-15 | 1978-12-15 | Modulator circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5580961A true JPS5580961A (en) | 1980-06-18 |
Family
ID=15578641
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15418378A Pending JPS5580961A (en) | 1978-12-15 | 1978-12-15 | Modulator circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5580961A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6245283A (en) * | 1985-08-23 | 1987-02-27 | Sony Corp | Correction circuit for horizontal deflection distortion |
-
1978
- 1978-12-15 JP JP15418378A patent/JPS5580961A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6245283A (en) * | 1985-08-23 | 1987-02-27 | Sony Corp | Correction circuit for horizontal deflection distortion |
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