JPS61119466U - - Google Patents
Info
- Publication number
- JPS61119466U JPS61119466U JP73085U JP73085U JPS61119466U JP S61119466 U JPS61119466 U JP S61119466U JP 73085 U JP73085 U JP 73085U JP 73085 U JP73085 U JP 73085U JP S61119466 U JPS61119466 U JP S61119466U
- Authority
- JP
- Japan
- Prior art keywords
- current source
- vertical
- pulse
- constant current
- separation 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
- 239000003990 capacitor Substances 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Synchronizing For Television (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図は従来例を示す回路図、第３図は第２図の動作
説明に用いる波形図、第４図は第１図の動作説明
に用いる波形図を示す。
１は複合映像信号入力端子、２，２１はコンデ
ンサ、３，４，８，９，１２，１３，１６，１８
は抵抗、５，１０，１１，１４，１５，１７はト
ランジスタ、６，７はダイオード、１９，２２，
２４はバイアス端子、２０はパルス入力端子、２
６は電源端子、２３はコンパレータ、２５は出力
端子。
Figure 1 is a circuit diagram showing one embodiment of the present invention;
3 is a circuit diagram showing a conventional example, FIG. 3 is a waveform diagram used to explain the operation of FIG. 2, and FIG. 4 is a waveform diagram used to explain the operation of FIG. 1. 1 is a composite video signal input terminal, 2 and 21 are capacitors, 3, 4, 8, 9, 12, 13, 16, 18
are resistors, 5, 10, 11, 14, 15, 17 are transistors, 6, 7 are diodes, 19, 22,
24 is a bias terminal, 20 is a pulse input terminal, 2
6 is a power supply terminal, 23 is a comparator, and 25 is an output terminal.
Claims (1)
定電流源とを有し、前記電流源と前記定電流源か
らの電流の差電流により、コンデンサを充放電さ
せる垂直同期分離回路において、更に水平パルス
を分周して垂直パルスを発生させる手段を有し、
該手段からの垂直パルスにより前記定電流源の電
流を減少させることを特徴とする垂直同期分離回
路。 a current source that flows a current proportional to the composite synchronization signal;
a constant current source, the vertical synchronization separation circuit charges and discharges a capacitor by a difference current between the current source and the constant current source, further comprising means for frequency-dividing the horizontal pulse to generate a vertical pulse. have,
A vertical synchronization separation circuit characterized in that the current of the constant current source is reduced by a vertical pulse from the means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985000730U JPH0441660Y2 (en) | 1985-01-08 | 1985-01-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985000730U JPH0441660Y2 (en) | 1985-01-08 | 1985-01-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61119466U true JPS61119466U (en) | 1986-07-28 |
| JPH0441660Y2 JPH0441660Y2 (en) | 1992-09-30 |
Family
ID=30472836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985000730U Expired JPH0441660Y2 (en) | 1985-01-08 | 1985-01-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0441660Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5750176A (en) * | 1980-09-09 | 1982-03-24 | Sanyo Electric Co Ltd | Synchronizing separation circuit |
-
1985
- 1985-01-08 JP JP1985000730U patent/JPH0441660Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5750176A (en) * | 1980-09-09 | 1982-03-24 | Sanyo Electric Co Ltd | Synchronizing separation circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0441660Y2 (en) | 1992-09-30 |
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