JPS5752273A - Horizontal synchronizing circuit - Google Patents
Horizontal synchronizing circuitInfo
- Publication number
- JPS5752273A JPS5752273A JP16227480A JP16227480A JPS5752273A JP S5752273 A JPS5752273 A JP S5752273A JP 16227480 A JP16227480 A JP 16227480A JP 16227480 A JP16227480 A JP 16227480A JP S5752273 A JPS5752273 A JP S5752273A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- horizontal
- synchronizing signal
- synchronizing
- detecting
- 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
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
- H04N5/12—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Synchronizing For Television (AREA)
Abstract
PURPOSE:To prevent a malfunction of a detecting circuit, which is caused by a noise, and to detect a synchronizing state exactly, by inhibiting a horizontal synchronizing input to the detecting circuit only during the period of a burst gate pulse, when switching an operation of an AFC or APC circuit. CONSTITUTION:A horizontal synchronizing signal HP is set to a reference signal, frequency of an nfH VCO7 oscillating higher frequency than horizontal frequency is divided by a frequency-dividing circuit 8, and a horizontal AFC circuit 1 or a horizontal APC circuit 2 is controlled in accordance with a phase difference between said divided output and the synchronizing signal HP. This horizontal synchronizing circuit is provided with an H killer circuit 14 for detecting the coincidence of phase of the synchronizing signal HP and a horizontal flyback pulse FP outputted from a horizontal deflection part 3, a gate circuit 4 for inputting the synchronizing signal HP and the divided output from the circuit 8, a phase detecting circut 5 and an LPF6 are controlled by an output of said circuit 14, an input of the synchronizing signal HP to the circuit 5 is inhibited only during the period of a burst gate pulse, and a malfunction of the circuit 5, which is caused by a noise is prevented.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16227480A JPS5752273A (en) | 1980-11-17 | 1980-11-17 | Horizontal synchronizing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16227480A JPS5752273A (en) | 1980-11-17 | 1980-11-17 | Horizontal synchronizing circuit |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12746080A Division JPS5752268A (en) | 1980-09-12 | 1980-09-12 | Horizontal synchronizing circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5752273A true JPS5752273A (en) | 1982-03-27 |
| JPS6155825B2 JPS6155825B2 (en) | 1986-11-29 |
Family
ID=15751344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16227480A Granted JPS5752273A (en) | 1980-11-17 | 1980-11-17 | Horizontal synchronizing circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5752273A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0119870Y2 (en) * | 1985-04-30 | 1989-06-08 | ||
| JPH0646517U (en) * | 1992-12-10 | 1994-06-28 | 株式会社セイバン | bag |
-
1980
- 1980-11-17 JP JP16227480A patent/JPS5752273A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6155825B2 (en) | 1986-11-29 |
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