JPS5753192A - Subcarrier signal reproducing circuit - Google Patents
Subcarrier signal reproducing circuitInfo
- Publication number
- JPS5753192A JPS5753192A JP12825180A JP12825180A JPS5753192A JP S5753192 A JPS5753192 A JP S5753192A JP 12825180 A JP12825180 A JP 12825180A JP 12825180 A JP12825180 A JP 12825180A JP S5753192 A JPS5753192 A JP S5753192A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- burst
- phase
- supplied
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/44—Colour synchronisation
- H04N9/455—Generation of colour burst signals; Insertion of colour burst signals in colour picture signals or separation of colour burst signals from colour picture signals
Abstract
PURPOSE:To make the response speed high and to improve the precision, by providing two sample hold circuits which sample and hold the output of a phase comparing circuit and driving them selectively, and synthesizing respective outputs to obtain the control voltage of a VCO. CONSTITUTION:A burst gate circuit 11 receives the signal supplied to a composite video signal input terminal 9 and the gate pulse supplied to a burst gate pulse input terminal 10 and separates the color burst from the composite video signal. A phase comparing circut 12 compared the phase of the reproduced subcarrier signal from a voltage control oscillator (VCO) 17 and that of the output signal of the burst gate circuit 11 with each other. The output of the phase comparing circuit 12 is supplied to sampling hold circuit 13 and 14. Sampling hold circuits 13 and 14 are driven at every two horizontal periods in accordance with the phase of the input burst by sampling pulses. Outputs of sampling hold circuits 13 and 14 are reduced to the control signal of the VCO17 through an adding circuit 15 and a filter circuit 16. A reproduced subcarrier signal is transmitted from the VCO17.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12825180A JPS5753192A (en) | 1980-09-16 | 1980-09-16 | Subcarrier signal reproducing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12825180A JPS5753192A (en) | 1980-09-16 | 1980-09-16 | Subcarrier signal reproducing circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5753192A true JPS5753192A (en) | 1982-03-30 |
| JPS625515B2 JPS625515B2 (en) | 1987-02-05 |
Family
ID=14980227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12825180A Granted JPS5753192A (en) | 1980-09-16 | 1980-09-16 | Subcarrier signal reproducing circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5753192A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0209198A2 (en) * | 1985-07-17 | 1987-01-21 | Philips Patentverwaltung GmbH | Circuit arrangement for a colour picture recording and reproducing apparatus or a colour television receiver |
| JPH0738910A (en) * | 1993-07-24 | 1995-02-07 | Nec Corp | Burst control oscillation circuit |
| JP2009200570A (en) * | 2008-02-19 | 2009-09-03 | Hitachi Ltd | Clock recovery circuit |
-
1980
- 1980-09-16 JP JP12825180A patent/JPS5753192A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0209198A2 (en) * | 1985-07-17 | 1987-01-21 | Philips Patentverwaltung GmbH | Circuit arrangement for a colour picture recording and reproducing apparatus or a colour television receiver |
| EP0209198A3 (en) * | 1985-07-17 | 1988-11-02 | Philips Patentverwaltung GmbH | Circuit arrangement for a colour picture recording and reproducing apparatus or a colour television receiver |
| JPH0738910A (en) * | 1993-07-24 | 1995-02-07 | Nec Corp | Burst control oscillation circuit |
| JP2009200570A (en) * | 2008-02-19 | 2009-09-03 | Hitachi Ltd | Clock recovery circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS625515B2 (en) | 1987-02-05 |
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