JPH0425371U - - Google Patents
Info
- Publication number
- JPH0425371U JPH0425371U JP6545090U JP6545090U JPH0425371U JP H0425371 U JPH0425371 U JP H0425371U JP 6545090 U JP6545090 U JP 6545090U JP 6545090 U JP6545090 U JP 6545090U JP H0425371 U JPH0425371 U JP H0425371U
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- frequency
- voltage
- integrating
- input signal
- 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
- 238000007493 shaping process Methods 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Details Of Television Scanning (AREA)
Description
第１図ｂは本考案の一実施例を示す回路図、第
１図ａは第１図ｂの各部の信号波形図、第２図ｂ
は従来例を示す回路図、第２図ａは第２図ｂの各
部の信号波形図である。
１……入力端子、２，４，７……積分回路、３
……コンパレータ、５……周波数・電圧コンバー
タ、６……コンデンサ、９……トランジスタ、１
０……抵抗。
Fig. 1b is a circuit diagram showing an embodiment of the present invention, Fig. 1a is a signal waveform diagram of each part of Fig. 1b, Fig. 2b
2 is a circuit diagram showing a conventional example, and FIG. 2a is a signal waveform diagram of each part in FIG. 2b. 1...Input terminal, 2, 4, 7...Integrator circuit, 3
... Comparator, 5 ... Frequency/voltage converter, 6 ... Capacitor, 9 ... Transistor, 1
0...Resistance.
Claims (1)
Ｔモニタのフオーカス回路において、 入力信号に同期した掃引周波数の帰線パルスを
入力とし、該パルスの周波数Ｆを定数Ｋに比例し
た電圧Ｖに変換する周波数・電圧コンバータと、 前記周波数・電圧コンバータの入出力端間に設
けられ、前記帰線パルスを積分し波形整形した信
号によつて、前記電圧Ｖをスイツチング制御して
パルスを作成する制御部と、 前記周波数・電圧コンバータの出力側パルスを
定数Ａで積分して三角波を得る積分回路とを備え
たことを特徴とするフオーカス回路。[Claims for Utility Model Registration] CR in which the sweep frequency automatically follows the input signal
In the focus circuit of the T monitor, a frequency/voltage converter receives a retrace pulse with a sweep frequency synchronized with the input signal and converts the frequency F of the pulse into a voltage V proportional to a constant K; a control section that is provided between input and output terminals and that controls switching of the voltage V to create a pulse using a signal obtained by integrating the retrace pulse and shaping the waveform; A focus circuit comprising: an integrating circuit that integrates at A to obtain a triangular wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6545090U JPH0425371U (en) | 1990-06-22 | 1990-06-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6545090U JPH0425371U (en) | 1990-06-22 | 1990-06-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0425371U true JPH0425371U (en) | 1992-02-28 |
Family
ID=31597288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6545090U Pending JPH0425371U (en) | 1990-06-22 | 1990-06-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0425371U (en) |
-
1990
- 1990-06-22 JP JP6545090U patent/JPH0425371U/ja active Pending