JPS5580961A - Modulator circuit - Google Patents

Modulator circuit

Info

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
Application number
JP15418378A
Other languages
Japanese (ja)
Inventor
Sadao Imai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP15418378A priority Critical patent/JPS5580961A/en
Publication of JPS5580961A publication Critical patent/JPS5580961A/en
Pending legal-status Critical Current

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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.
JP15418378A 1978-12-15 1978-12-15 Modulator circuit Pending JPS5580961A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6245283A (en) * 1985-08-23 1987-02-27 Sony Corp Correction circuit for horizontal deflection distortion

Cited By (1)

* Cited by examiner, † Cited by third party
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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