JPS6285054U - - Google Patents
Info
- Publication number
- JPS6285054U JPS6285054U JP17721285U JP17721285U JPS6285054U JP S6285054 U JPS6285054 U JP S6285054U JP 17721285 U JP17721285 U JP 17721285U JP 17721285 U JP17721285 U JP 17721285U JP S6285054 U JPS6285054 U JP S6285054U
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- circuit
- voltage
- synchronous
- ramp waveform
- 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
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Synchronizing For Television (AREA)
Description
第１図は本考案に係る同期回路の一実施例を示
すブロツク図であり、第２図は上記実施例の動作
示すタイミングチヤートであり、第３図は上記実
施例の変形例を示す要部ブロツク図であり、第４
図は上記実施例における波形整形回路の具体的な
回路構成例を示す回路図である。第５図は従来の
同期回路の問題点を説明するための波形図である
。
１……電圧制御型発振器、３……トランス、４
……パルス発生器、５……波形整形回路、６……
サンプル・ホールド回路、７……フイルタ、８…
…レベルコンバータ、９……同期分離回路。
FIG. 1 is a block diagram showing an embodiment of the synchronous circuit according to the present invention, FIG. 2 is a timing chart showing the operation of the above embodiment, and FIG. 3 is a main part showing a modification of the above embodiment. This is a block diagram, and the fourth
The figure is a circuit diagram showing a specific circuit configuration example of the waveform shaping circuit in the above embodiment. FIG. 5 is a waveform diagram for explaining the problems of the conventional synchronous circuit. 1... Voltage controlled oscillator, 3... Transformer, 4
...Pulse generator, 5...Waveform shaping circuit, 6...
Sample/hold circuit, 7...Filter, 8...
...Level converter, 9...Synchronization separation circuit.
Claims (1)
えた同期回路において、 フライバツクパルスをタイミングパルスとして
所定パルス幅のパルスを形成するパルス形成回路
と、 上記パルス形成回路から供給されるパルスを平
均電圧と中心電圧とが一致したランプ状波形信号
に波形整形する波形整形回路と、 上記波形整形回路から供給されるランプ状波形
信号を同期信号より形成されたサンプリングパル
スにてサンプル・ホールドするサンプル・ホール
ド回路と、 上記ランプ状波形信号の中心電圧のところで自
走周波数となる電圧制御型発振器とを設け、 上記サンプル・ホールド回路のホールド出力を
エラー電圧として上記電圧制御型発振器に帰還す
るように構成したことを特徴とする同期回路。[Claims for Utility Model Registration] In a synchronous circuit equipped with a phase locked loop for synchronous control, a pulse forming circuit that forms a pulse with a predetermined pulse width using a flyback pulse as a timing pulse, and a pulse forming circuit that is supplied from the pulse forming circuit. A waveform shaping circuit that shapes the pulse into a ramp waveform signal whose average voltage and center voltage match, and samples the ramp waveform signal supplied from the waveform shaping circuit with a sampling pulse formed from a synchronization signal. - Provide a sample-and-hold circuit for holding and a voltage-controlled oscillator whose free-running frequency is at the center voltage of the ramp waveform signal, and use the hold output of the sample-and-hold circuit as an error voltage to the voltage-controlled oscillator. A synchronous circuit characterized in that it is configured to provide feedback.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17721285U JPH0619251Y2 (en) | 1985-11-18 | 1985-11-18 | Synchronous circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17721285U JPH0619251Y2 (en) | 1985-11-18 | 1985-11-18 | Synchronous circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6285054U true JPS6285054U (en) | 1987-05-30 |
| JPH0619251Y2 JPH0619251Y2 (en) | 1994-05-18 |
Family
ID=31118201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17721285U Expired - Lifetime JPH0619251Y2 (en) | 1985-11-18 | 1985-11-18 | Synchronous circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0619251Y2 (en) |
-
1985
- 1985-11-18 JP JP17721285U patent/JPH0619251Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0619251Y2 (en) | 1994-05-18 |