JPS5556767A - Vertical synchronism detector circuit - Google Patents
Vertical synchronism detector circuitInfo
- Publication number
- JPS5556767A JPS5556767A JP13034578A JP13034578A JPS5556767A JP S5556767 A JPS5556767 A JP S5556767A JP 13034578 A JP13034578 A JP 13034578A JP 13034578 A JP13034578 A JP 13034578A JP S5556767 A JPS5556767 A JP S5556767A
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- synchronous
- vertical
- circuit
- detector circuit
- 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
Landscapes
- Synchronizing For Television (AREA)
Abstract
PURPOSE: To obtain a vertical synchronous detector circuit which is suited for formation into the integrated circuit and can obtain the pulse of the steady phase.
CONSTITUTION: Up-down counter 23 is controlled by the composite synchronous pulse isolated by synchronous isolator circuit 22. The up- and down-count functions of counter 23 are switched by the composite synchronous pulse applied to terminal 24. In other words, the up-count action is secured in the horizontal synchronous pulse section (5.1μs), the equalization pulse section (about 2.5μs) and the vertical synchronous pulse section (about 29.3μs) each; and the down-counting is given in other sections. When the count number becomes larger than the data which is set previously to comparator 35 after up-counting, the vertical pulse is generated from circuit 35 to be led out to output terminal 37.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13034578A JPS5556767A (en) | 1978-10-23 | 1978-10-23 | Vertical synchronism detector circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13034578A JPS5556767A (en) | 1978-10-23 | 1978-10-23 | Vertical synchronism detector circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5556767A true JPS5556767A (en) | 1980-04-25 |
JPS6150429B2 JPS6150429B2 (en) | 1986-11-04 |
Family
ID=15032161
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13034578A Granted JPS5556767A (en) | 1978-10-23 | 1978-10-23 | Vertical synchronism detector circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5556767A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5679579A (en) * | 1979-11-30 | 1981-06-30 | Seiko Epson Corp | Detection circuit for vertical synchronizing signal |
JPS63110873A (en) * | 1986-10-28 | 1988-05-16 | Mitsubishi Electric Corp | Noise removing device for synchronizing signal |
US5031041A (en) * | 1989-04-20 | 1991-07-09 | Thomson Consumer Electronics, Inc. | Digital detector/filter for synchronizing signals |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01200946A (en) * | 1988-02-05 | 1989-08-14 | Toyo Cap Kk | Method and apparatus for preparing straw |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5382121A (en) * | 1976-12-27 | 1978-07-20 | Matsushita Electric Ind Co Ltd | Vertical synchronizing signal separation circuit by means of digital system |
-
1978
- 1978-10-23 JP JP13034578A patent/JPS5556767A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5382121A (en) * | 1976-12-27 | 1978-07-20 | Matsushita Electric Ind Co Ltd | Vertical synchronizing signal separation circuit by means of digital system |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5679579A (en) * | 1979-11-30 | 1981-06-30 | Seiko Epson Corp | Detection circuit for vertical synchronizing signal |
JPS63110873A (en) * | 1986-10-28 | 1988-05-16 | Mitsubishi Electric Corp | Noise removing device for synchronizing signal |
US5031041A (en) * | 1989-04-20 | 1991-07-09 | Thomson Consumer Electronics, Inc. | Digital detector/filter for synchronizing signals |
Also Published As
Publication number | Publication date |
---|---|
JPS6150429B2 (en) | 1986-11-04 |
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