JPS5534382A - Separator circuit for synchronizing signal - Google Patents
Separator circuit for synchronizing signalInfo
- 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
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
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)
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 |
-
1978
- 1978-09-04 JP JP10840478A patent/JPS5534382A/en active Pending
Cited By (3)
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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