JPS5784681A - Vertical deflection circuit - Google Patents

Vertical deflection circuit

Info

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
Application number
JP16218580A
Other languages
Japanese (ja)
Inventor
Yoshimichi Yahagi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP16218580A priority Critical patent/JPS5784681A/en
Publication of JPS5784681A publication Critical patent/JPS5784681A/en
Pending legal-status Critical Current

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.
JP16218580A 1980-11-17 1980-11-17 Vertical deflection circuit Pending JPS5784681A (en)

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 (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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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