JPS56169422A - Phase synchronizing circuit - Google Patents
Phase synchronizing circuitInfo
- Publication number
- JPS56169422A JPS56169422A JP7316080A JP7316080A JPS56169422A JP S56169422 A JPS56169422 A JP S56169422A JP 7316080 A JP7316080 A JP 7316080A JP 7316080 A JP7316080 A JP 7316080A JP S56169422 A JPS56169422 A JP S56169422A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- converter
- circuit
- fed
- color burst
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters
- H03M1/0617—Continuously compensating for, or preventing, undesired influence of physical parameters characterised by the use of methods or means not specific to a particular type of detrimental influence
- H03M1/0624—Continuously compensating for, or preventing, undesired influence of physical parameters characterised by the use of methods or means not specific to a particular type of detrimental influence by synchronisation
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters
- H03M1/08—Continuously compensating for, or preventing, undesired influence of physical parameters of noise
- H03M1/0836—Continuously compensating for, or preventing, undesired influence of physical parameters of noise of phase error, e.g. jitter
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Color Television Systems (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE:To reduce the phase jitter of sampled clock, by adding a fluctuating signal within one quantized step of an A/D converter to the color burst of an input signal for the A/D conversion. CONSTITUTION:An NTSC signal from an input terminal 1 is fed to a synchronizing separation circuit 4 and fed to an A/D converter 2 via an adder 42 for digitization. A color burst signal is picked up at a burst pickup circuit 5 by the output of the circuit 4 from the converter 2, and the phase shift with the reference signal is detected at an operation circuit 6, and this detected output controls a voltage controlled oscillator 8 via a D/A converter 7 to produce sampled clocks. Further, a fluctuation signal in step the amplitude of which is changed per color burst one cycle is produced at a production circuit 41 and fed to the adder 42, and the phase comparison characteristics are in bang bang control and the phase jitter can be reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7316080A JPS56169422A (en) | 1980-05-31 | 1980-05-31 | Phase synchronizing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7316080A JPS56169422A (en) | 1980-05-31 | 1980-05-31 | Phase synchronizing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56169422A true JPS56169422A (en) | 1981-12-26 |
Family
ID=13510134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7316080A Pending JPS56169422A (en) | 1980-05-31 | 1980-05-31 | Phase synchronizing circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56169422A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61135229A (en) * | 1984-12-03 | 1986-06-23 | アールシーエー トムソン ライセンシング コーポレイシヨン | Processor for analog signal |
-
1980
- 1980-05-31 JP JP7316080A patent/JPS56169422A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61135229A (en) * | 1984-12-03 | 1986-06-23 | アールシーエー トムソン ライセンシング コーポレイシヨン | Processor for analog signal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0336669A3 (en) | Sampling frequency converter | |
| JPS56169422A (en) | Phase synchronizing circuit | |
| JPS5518125A (en) | Phase synchronous circuit | |
| JPS56169423A (en) | Phase synchronizing circuit | |
| JPS56169421A (en) | Phase synchronizing circuit | |
| JPS5625827A (en) | Coding unit | |
| JPS5614727A (en) | Phase comparator of digital pll circuit | |
| JPS5738092A (en) | Compensator for differentiation phase | |
| JPS5620355A (en) | Clock signal forming circuit | |
| JPS55125780A (en) | Time axis correction unit | |
| JPS648729A (en) | Da converting circuit | |
| JPS56169478A (en) | Clamp circuit | |
| JPS5521639A (en) | Clock generation circuit | |
| JPS6412691A (en) | Video signal sampling circuit | |
| JPS6442949A (en) | Timing extraction circuit | |
| JPS57196867A (en) | Phase controlling circuit | |
| JPS5767383A (en) | Jitter correction device | |
| JPS5571390A (en) | Clock stabilizing circuit | |
| JPS642484A (en) | Clock synchronizing circuit of sampling rate converting circuit | |
| JPS54150917A (en) | Pal synchronous signal generating system | |
| JPS56100526A (en) | Adaptive phase synchronizing circuit | |
| JPS6432795A (en) | Television time base correcting device | |
| JPS5662484A (en) | Synchronizing separation circuit | |
| JPS55166333A (en) | Digital phase modulator | |
| JPS5444432A (en) | Generator of sampled clock pulse |