JPS55102971A - Pal-system synchronizing signal generator - Google Patents
Pal-system synchronizing signal generatorInfo
- Publication number
- JPS55102971A JPS55102971A JP1109879A JP1109879A JPS55102971A JP S55102971 A JPS55102971 A JP S55102971A JP 1109879 A JP1109879 A JP 1109879A JP 1109879 A JP1109879 A JP 1109879A JP S55102971 A JPS55102971 A JP S55102971A
- Authority
- JP
- Japan
- Prior art keywords
- output
- offset
- circuit
- dividing ratio
- counter
- 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
Abstract
PURPOSE: To simplify the constitution of a circuit by making offset removal operation possible even if a decoder output or waveform-shaping output lags an original oscillation output by three clocks, by removing an offset by varying the dividing ratio of a counter.
CONSTITUTION: The original oscillation frequency of original oscillator 1 is set an integer greater than the chrominance subcarrier frequency of the PAL system and applied to counter 20 whose dividing ratio is variable; the dividing ratio is normally set to one-seventh and to one-eighth only when an offset is removed. The dividing ratio of this counter 20 is varied by the output of control circuit 22 of offset removal circuit 3 and to circuit 22, the fixed output of decoder 23 and those of waveform shaping circuits 24 and 25 based upon division outputs of horizontal and vertical periods are supplied. Then, a signal with the offset removed is applied to synthesizer 10 via PLL circuit 11 and at the output of synthesizer 10, various needed synchronizing signals appear.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1109879A JPS6038066B2 (en) | 1979-02-01 | 1979-02-01 | PAL synchronization signal generator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1109879A JPS6038066B2 (en) | 1979-02-01 | 1979-02-01 | PAL synchronization signal generator |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55102971A true JPS55102971A (en) | 1980-08-06 |
JPS6038066B2 JPS6038066B2 (en) | 1985-08-29 |
Family
ID=11768521
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1109879A Expired JPS6038066B2 (en) | 1979-02-01 | 1979-02-01 | PAL synchronization signal generator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6038066B2 (en) |
-
1979
- 1979-02-01 JP JP1109879A patent/JPS6038066B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS6038066B2 (en) | 1985-08-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2040848A1 (en) | Pll frequency synthesizer | |
JPS55147077A (en) | Synchronizing signal generator | |
JPS5498523A (en) | Synchronizer between reproduced video signal from video disc and other video signals | |
JPS5797751A (en) | Circuit for adding artificial synchronizing signal | |
JPS55107388A (en) | Synchronizing signal separation system | |
JPS5757051A (en) | Fm stereo receiver | |
JPS55102971A (en) | Pal-system synchronizing signal generator | |
GB2301499A (en) | Adjustable frequency synthesizer | |
JPS5357914A (en) | Synchronous oscillator | |
JPS5582581A (en) | Color synchronism circuit of apc type | |
JPS5595467A (en) | Synchronizing signal generator | |
JPS6413833A (en) | Frame synchronizing clock generating circuit | |
JPS6412691A (en) | Video signal sampling circuit | |
JPS5582568A (en) | Afc circuit | |
JPS55125780A (en) | Time axis correction unit | |
JPS5773575A (en) | Synchronizing signal generating circuit | |
JPS52106229A (en) | Carrier wave signal formation circuit containing line offset | |
JPS57173267A (en) | Afc circuit | |
JPS5451715A (en) | Channel selector | |
JPS57180282A (en) | Hard copy device | |
JPS5552687A (en) | Synchronous signal generating device | |
JPS5333038A (en) | Phase synchronizing oscillator | |
JPS5620355A (en) | Clock signal forming circuit | |
JPS5564475A (en) | Synchronous coupling system of pal system synchronizing signal generator | |
JPS57183132A (en) | Phase synchromizing circuit |