JPH0262873U - - Google Patents
Info
- Publication number
- JPH0262873U JPH0262873U JP14172588U JP14172588U JPH0262873U JP H0262873 U JPH0262873 U JP H0262873U JP 14172588 U JP14172588 U JP 14172588U JP 14172588 U JP14172588 U JP 14172588U JP H0262873 U JPH0262873 U JP H0262873U
- Authority
- JP
- Japan
- Prior art keywords
- synchronization signal
- circuit
- vertical synchronization
- changeover switch
- signal component
- 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
- 238000000926 separation method Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 3
- 230000001934 delay Effects 0.000 claims 1
- 230000003111 delayed effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Synchronizing For Television (AREA)
Description
第１図及び第３図は夫々本考案及び従来の同期
信号処理回路のブロツク構成図、第２図及び第４
図は夫々本考案回路及び従来回路の動作説明用信
号波形図、第５図は本考案回路の具体的な回路構
成例を示す回路図である。
２…Ｈ／Ｖ分離回路、３，４…波形整形回路、
５…切換えスイツチ、５′…ＯＮ／ＯＦＦスイツ
チ、６…１Ｈ遅延回路、７…垂直同期信号検出回
路、８…Ｏ．Ｓ．Ｍ（ワンシヨツトマルチバイブ
レータ）、９…排他的論理和回路、１０…同期信
号処理回路。
1 and 3 are block diagrams of the present invention and a conventional synchronous signal processing circuit, respectively, and FIGS.
The figures are signal waveform diagrams for explaining the operation of the circuit of the present invention and the conventional circuit, respectively, and FIG. 5 is a circuit diagram showing a specific example of the circuit configuration of the circuit of the present invention. 2... H/V separation circuit, 3, 4... Waveform shaping circuit,
5... Changeover switch, 5'... ON/OFF switch, 6... 1H delay circuit, 7... Vertical synchronization signal detection circuit, 8... O. S. M (one-shot multivibrator), 9...exclusive OR circuit, 10...synchronous signal processing circuit.
Claims (1)
信号成分と垂直同期信号成分とを分離するＨ／Ｖ
分離回路と、該水平同期信号成分と垂直同期信号
成分を夫々波形整形して水平同期信号及び垂直同
期信号を出力する第１、第２の波形整形回路とを
有する同期信号処理回路において、上記Ｈ／Ｖ分
離回路からの垂直同期信号の有無によつて切換わ
る切換えスイツチと、上記第１の波形整形回路の
出力を１Ｈ（水平走査期間）遅延させて該切換え
スイツチに供給する１Ｈ遅延回路とを備え、上記
切換えスイツチを垂直同期期間には該１Ｈ遅延回
路側に、それ以外の期間には上記Ｈ／Ｖ分離回路
側に接続するよう構成したことを特徴とする同期
信号処理回路。 H/V that separates the horizontal synchronization signal component and vertical synchronization signal component from the incoming H/V combined signal
In the synchronization signal processing circuit having a separation circuit and first and second waveform shaping circuits that respectively shape the horizontal synchronization signal component and the vertical synchronization signal component to output a horizontal synchronization signal and a vertical synchronization signal, A changeover switch that changes depending on the presence or absence of a vertical synchronization signal from the /V separation circuit, and a 1H delay circuit that delays the output of the first waveform shaping circuit by 1H (horizontal scanning period) and supplies the delayed output to the changeover switch. A synchronization signal processing circuit, characterized in that the changeover switch is connected to the 1H delay circuit during a vertical synchronization period and to the H/V separation circuit during other periods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14172588U JPH0262873U (en) | 1988-10-28 | 1988-10-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14172588U JPH0262873U (en) | 1988-10-28 | 1988-10-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0262873U true JPH0262873U (en) | 1990-05-10 |
Family
ID=31407049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14172588U Pending JPH0262873U (en) | 1988-10-28 | 1988-10-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0262873U (en) |
-
1988
- 1988-10-28 JP JP14172588U patent/JPH0262873U/ja active Pending