JPS54100623A - Vertical synchronizing circuit - Google Patents

Vertical synchronizing circuit

Info

Publication number
JPS54100623A
JPS54100623A JP766778A JP766778A JPS54100623A JP S54100623 A JPS54100623 A JP S54100623A JP 766778 A JP766778 A JP 766778A JP 766778 A JP766778 A JP 766778A JP S54100623 A JPS54100623 A JP S54100623A
Authority
JP
Japan
Prior art keywords
circuit
vertical
synchronizing
pulse
synchronizing signal
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
JP766778A
Other languages
Japanese (ja)
Inventor
Fumio Inoue
Nobuyuki Suzuki
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP766778A priority Critical patent/JPS54100623A/en
Priority to DE19782837258 priority patent/DE2837258A1/en
Publication of JPS54100623A publication Critical patent/JPS54100623A/en
Pending legal-status Critical Current

Links

Landscapes

  • Synchronizing For Television (AREA)
  • Closed-Circuit Television Systems (AREA)

Abstract

PURPOSE: To obtain a vertical synchronizing circuit with noise-proof characteristics improved through excellent skip scanning using a retriggerable multivibrator.
CONSTITUTION: The output of synchronizing sepapator circuit 1 is applied to horizontal deflecting circuit 8 and also to vertical-syhchronizing-signal detection circuit 27. Thus circuit 27, consisting of a circuit charging capacitor with a constant current in the input period of a synchronizing signal pulse, a switch circuit discharging capacitor 16 after the pulse end and a clip circuit, detects a vertical synchronizing signal from an input composite synchronizing signal judging from a difference in pulse width. The vertical synchronizing signal obtained in this way drives vertical oscillation circuit 7 by way of retriggerable multivibrator 26 and integrator 2. This retriggerable multivibrator 26 is so adjusted that pulses will be generated which have pulse width a trifle longer than that of the vertical-synchronizing-signal pulse.
COPYRIGHT: (C)1979,JPO&Japio
JP766778A 1977-08-29 1978-01-26 Vertical synchronizing circuit Pending JPS54100623A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP766778A JPS54100623A (en) 1978-01-26 1978-01-26 Vertical synchronizing circuit
DE19782837258 DE2837258A1 (en) 1977-08-29 1978-08-25 TV vertical sync. detector - uses transistor with capacitor in collector and constant current supply detecting vertical sync. from mixed signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP766778A JPS54100623A (en) 1978-01-26 1978-01-26 Vertical synchronizing circuit

Publications (1)

Publication Number Publication Date
JPS54100623A true JPS54100623A (en) 1979-08-08

Family

ID=11672148

Family Applications (1)

Application Number Title Priority Date Filing Date
JP766778A Pending JPS54100623A (en) 1977-08-29 1978-01-26 Vertical synchronizing circuit

Country Status (1)

Country Link
JP (1) JPS54100623A (en)

Similar Documents

Publication Publication Date Title
JPS57154983A (en) Multiplying circuit of horizontal scan frequency
JPS5761327A (en) Periodicity pulse extraction circuit
JPS55109968A (en) Frequency decision circuit
JPS54104230A (en) Processing circuit for vertical synchronizing signal
JPS54100623A (en) Vertical synchronizing circuit
JPS54124633A (en) Display circuit of television receiver
JPS5397319A (en) Facsimile scanning system
JPS5430727A (en) Noise eliminator circuit of synchronous separator circuit
JPS5531386A (en) Time reference signal generator
EP0158409A3 (en) Improved threshold detector
JPS5487421A (en) Binary circuit
SU1509946A1 (en) Device for nonlinear correction of discrete signals
JPS536080A (en) Frequency detection circuit
JPS5575386A (en) Detector circuit for vertical synchronous pulse
JPS56169969A (en) Synchronisum separation circuit
JPS54150917A (en) Pal synchronous signal generating system
JPS5493951A (en) Frequency digital variable pulse generator
JPS54118211A (en) Detection circuit of drop-out
JPS54134050A (en) Monitoring method and apparatus for welding current
JPS5520006A (en) Noise filter circuit
JPS57211891A (en) Tone detector
JPS57208611A (en) Dropout detecting circuit
JPS52100832A (en) Measuring method of delay time of ghost
JPS5525208A (en) Horizontal automatic frequency control circuit
JPS54108524A (en) Color synchronizer of beam index type picture receiver