JPH03115475U - - Google Patents
Info
- Publication number
- JPH03115475U JPH03115475U JP2532590U JP2532590U JPH03115475U JP H03115475 U JPH03115475 U JP H03115475U JP 2532590 U JP2532590 U JP 2532590U JP 2532590 U JP2532590 U JP 2532590U JP H03115475 U JPH03115475 U JP H03115475U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- color
- circuit
- video signal
- amplitude
- 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
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000009499 grossing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Processing Of Color Television Signals (AREA)
Description
第１図はこの考案に係るＡＣＣ回路のブロツク
構成図、第２図は同ＡＣＣ回路の動作を示すタイ
ムチヤート、第３図は従来のＡＣＣ回路のブロツ
ク構成図である。
１……ＡＣＣ、３……電圧制御増幅回路、３ａ
……利得制御端子、４……バーストゲート回路、
５……検波回路、６……ローパスフイルタ（ＬＰ
Ｆ）、６ｂ……コンデンサ、７……充電回路。
FIG. 1 is a block diagram of an ACC circuit according to the invention, FIG. 2 is a time chart showing the operation of the ACC circuit, and FIG. 3 is a block diagram of a conventional ACC circuit. 1...ACC, 3...Voltage control amplifier circuit, 3a
...Gain control terminal, 4...Burst gate circuit,
5...Detection circuit, 6...Low pass filter (LP
F), 6b...capacitor, 7...charging circuit.
Claims (1)
・検波して得られた信号をコンデンサにより平滑
化してカラーバースト信号の振幅に応じた直流電
圧を得るとともに、このカラーバースト信号の振
幅に応じた直流電圧に基づいてカラー映像信号を
増幅する電圧制御増幅回路の利得を制御するＡＣ
Ｃ回路において、前記カラー映像信号のブランキ
ング期間に同期して前記平滑化のためのコンデン
サへ電荷を供給する充電回路を備えたことを特徴
とするＡＣＣ回路。 The signal obtained by extracting and detecting the color burst signal from the color video signal is smoothed by a capacitor to obtain a DC voltage corresponding to the amplitude of the color burst signal, and the DC voltage corresponding to the amplitude of this color burst signal is then detected. AC that controls the gain of the voltage-controlled amplifier circuit that amplifies the color video signal.
An ACC circuit characterized in that the C circuit includes a charging circuit that supplies charge to the smoothing capacitor in synchronization with a blanking period of the color video signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2532590U JPH03115475U (en) | 1990-03-13 | 1990-03-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2532590U JPH03115475U (en) | 1990-03-13 | 1990-03-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03115475U true JPH03115475U (en) | 1991-11-28 |
Family
ID=31528258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2532590U Pending JPH03115475U (en) | 1990-03-13 | 1990-03-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03115475U (en) |
-
1990
- 1990-03-13 JP JP2532590U patent/JPH03115475U/ja active Pending