JPS56102164A - Television signal synchronization separating circuit - Google Patents

Television signal synchronization separating circuit

Info

Publication number
JPS56102164A
JPS56102164A JP473580A JP473580A JPS56102164A JP S56102164 A JPS56102164 A JP S56102164A JP 473580 A JP473580 A JP 473580A JP 473580 A JP473580 A JP 473580A JP S56102164 A JPS56102164 A JP S56102164A
Authority
JP
Japan
Prior art keywords
voltage
amplifier
peak
output
stabilized
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
JP473580A
Other languages
Japanese (ja)
Inventor
Koichi Oota
Susumu Hanaoka
Teruo Kawatsu
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP473580A priority Critical patent/JPS56102164A/en
Publication of JPS56102164A publication Critical patent/JPS56102164A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/08—Separation of synchronising signals from picture signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Synchronizing For Television (AREA)

Abstract

PURPOSE:To make it possible to detect always stabilized synchronous signals even if the levels of television signals are changed by connecting a peak rectifying circuit to the output of an amplifier and returning the differential voltage between the output of the peak rectifying circuit and standard voltage to the amplifier. CONSTITUTION:TV signal VIN is inputted to input terminal 6 is inputted to wide band operation amplifier 12, the output is peak-rectified by peak rectifier 4 and the peak-rectified output proportional to the peak-rectified value is inputted to operation amplifier 13. The input is compared with standard voltage VS in amplifier 13 and the output is returned to amplifier 12. Therefore, the changed voltage of peak voltage VOP in amplifier 12 is amplified and returned to amplifier 12 at a larger variation rate, so that the output voltage of circuit 4 is controlled so as to consist with voltage VS, and voltage VOP is stabilized as constant output. In order to perform synchronous separation, the TV signal whose voltage VOP is stabilized at a constant level is detected at the constant level independently of input voltage. Thus, always stabilized synchronous signal can be detected.
JP473580A 1980-01-19 1980-01-19 Television signal synchronization separating circuit Pending JPS56102164A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP473580A JPS56102164A (en) 1980-01-19 1980-01-19 Television signal synchronization separating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP473580A JPS56102164A (en) 1980-01-19 1980-01-19 Television signal synchronization separating circuit

Publications (1)

Publication Number Publication Date
JPS56102164A true JPS56102164A (en) 1981-08-15

Family

ID=11592156

Family Applications (1)

Application Number Title Priority Date Filing Date
JP473580A Pending JPS56102164A (en) 1980-01-19 1980-01-19 Television signal synchronization separating circuit

Country Status (1)

Country Link
JP (1) JPS56102164A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5045943A (en) * 1985-02-28 1991-09-03 Canon Kabushiki Kaisha Synchronous signal separation circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5045943A (en) * 1985-02-28 1991-09-03 Canon Kabushiki Kaisha Synchronous signal separation circuit

Similar Documents

Publication Publication Date Title
JPS54160150A (en) Frequency selecting circuit
JPS57107615A (en) Peak detector
JPS56102164A (en) Television signal synchronization separating circuit
JPS57142088A (en) Detecting circuit for electric field strength
JPS55164981A (en) Read-in unit
JPS57154978A (en) Dc reproducing and synchronous separating circuit
JPS5488717A (en) Synchronous separation circuit
JPS5588476A (en) Automatic picture quality controller
JPS5592081A (en) Adjustment unit of television receiver
KR830007024A (en) TV automatic gain control system
JPS54118154A (en) Signal amplitude compander featuring polygonal line characteristics
JPS56160119A (en) Equalizing circuit of level ratio between video and voice
JPS56169443A (en) Detecting circuit for input signal interruption
JPS5443448A (en) Compressor
JPS5525279A (en) Automatic frequency tuning defeat device
JPS5455343A (en) Level discrimination circuit
JPS56160611A (en) Analog quantity indicator
JPS57109421A (en) Drop-out detecting circuit
JPS5657962A (en) Frequency detector
JPS57188118A (en) Television receiver
JPS56109030A (en) Modulator for pulse interval
JPS5338380A (en) Peak detecting circuit
JPS5511621A (en) Detection circuit
JPS54140447A (en) Frequency discrimination circuit
JPS5750156A (en) Am detection system