JPS5534382A - Separator circuit for synchronizing signal - Google Patents

Separator circuit for synchronizing signal

Info

Publication number
JPS5534382A
JPS5534382A JP10840478A JP10840478A JPS5534382A JP S5534382 A JPS5534382 A JP S5534382A JP 10840478 A JP10840478 A JP 10840478A JP 10840478 A JP10840478 A JP 10840478A JP S5534382 A JPS5534382 A JP S5534382A
Authority
JP
Japan
Prior art keywords
signal
separate
synchronizing signal
sink
fetq
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
JP10840478A
Other languages
Japanese (ja)
Inventor
Seisuke Hirakuri
Taku Uchiumi
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.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan 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 Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP10840478A priority Critical patent/JPS5534382A/en
Publication of JPS5534382A publication Critical patent/JPS5534382A/en
Pending legal-status Critical Current

Links

Landscapes

  • Synchronizing For Television (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

PURPOSE: To make it possible to separate accurately a synchronizing signal from a composite video signal, etc., by using a fixed reference detection signal and LPF for noise removal.
CONSTITUTION: Composite video signal (a) is clamped by clamping circuit 7 to decrease its pedestal level down to zero V, and then suplied to FETQ2. Signal (a), on the other hand, is passed through conventional synchronous separator circuit 2, etc., to generate a sampling pulse of a sink-chip level, which is applied to the gate of FETQ2. Then, the potential of the sink chip of signal (a) is sampled, its output is supplied to LPF10 to remove a high-frequency component and the voltage of it is divided at a fixed ratio, so that a reference detection signal within ranges of the sink chip level and pedestal level of signal (a) will be obtained. Next, operational amplifier 12 compares signal (a) with the above-mentioned reference signal to separate a horizontal synchronizing signal. In this way, the stable reference signal and LPF for noise removal are used to make it possible to separate the synchronizing signal accurately.
COPYRIGHT: (C)1980,JPO&Japio
JP10840478A 1978-09-04 1978-09-04 Separator circuit for synchronizing signal Pending JPS5534382A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10840478A JPS5534382A (en) 1978-09-04 1978-09-04 Separator circuit for synchronizing signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10840478A JPS5534382A (en) 1978-09-04 1978-09-04 Separator circuit for synchronizing signal

Publications (1)

Publication Number Publication Date
JPS5534382A true JPS5534382A (en) 1980-03-10

Family

ID=14483887

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10840478A Pending JPS5534382A (en) 1978-09-04 1978-09-04 Separator circuit for synchronizing signal

Country Status (1)

Country Link
JP (1) JPS5534382A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01274567A (en) * 1988-04-27 1989-11-02 Sony Corp Synchronizing separation circuit
US5229854A (en) * 1991-05-17 1993-07-20 Thomson Consumer Electronics, Inc. Vertical sync separator
US5260790A (en) * 1990-08-27 1993-11-09 Canon Kabushiki Kaisha Synchronizing signal separation device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01274567A (en) * 1988-04-27 1989-11-02 Sony Corp Synchronizing separation circuit
US5260790A (en) * 1990-08-27 1993-11-09 Canon Kabushiki Kaisha Synchronizing signal separation device
US5229854A (en) * 1991-05-17 1993-07-20 Thomson Consumer Electronics, Inc. Vertical sync separator

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