JPH0453374U - - Google Patents
Info
- Publication number
- JPH0453374U JPH0453374U JP9510990U JP9510990U JPH0453374U JP H0453374 U JPH0453374 U JP H0453374U JP 9510990 U JP9510990 U JP 9510990U JP 9510990 U JP9510990 U JP 9510990U JP H0453374 U JPH0453374 U JP H0453374U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- voltage
- white peak
- control circuit
- bias
- 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
Landscapes
- Television Receiver Circuits (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図は従来の回路と本考案の回路の作用効果のちが
いを表わす白ピーク・コントラスト特性図である
。
１……コントラストコントロール回路、２……
輝度信号制御回路、３……白ピーク圧縮回路、４
，５……抵抗、６……バイアス変換回路、８……
ダイオード。
Figure 1 is a circuit diagram showing one embodiment of the present invention, Figure 2 is a circuit diagram showing an embodiment of the present invention.
The figure is a white peak contrast characteristic diagram showing the difference in function and effect between the conventional circuit and the circuit of the present invention. 1...Contrast control circuit, 2...
Brightness signal control circuit, 3... White peak compression circuit, 4
, 5...Resistor, 6...Bias conversion circuit, 8...
diode.
Claims (1)
トロール回路と、該コントラストコントロール回
路からの制御電圧が供給される輝度信号制御回路
と、所定の動作電圧を有し、前記映像信号の白ピ
ークを圧縮する白ピーク圧縮回路とを有する映像
増幅回路において、 前記コントラストコントロール回路からの制御
電圧を変換するバイアス変換回路と、該バイアス
変換回路と前記白ピーク圧縮回路の間に設けられ
、バイアス変換回路のバイアス電圧が所定電圧以
下のとき白ピーク圧縮回路の動作電圧を下げる動
作電圧切換部とを備えたことを特徴とする映像増
幅回路。[Claims for Utility Model Registration] A contrast control circuit that changes the AC gain of the video signal, a brightness signal control circuit to which a control voltage from the contrast control circuit is supplied, and a brightness signal control circuit having a predetermined operating voltage, A video amplification circuit having a white peak compression circuit that compresses a white peak, a bias conversion circuit that converts a control voltage from the contrast control circuit, and a bias conversion circuit that is provided between the bias conversion circuit and the white peak compression circuit, 1. A video amplification circuit comprising: an operating voltage switching section that lowers an operating voltage of a white peak compression circuit when a bias voltage of a conversion circuit is less than a predetermined voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9510990U JPH0453374U (en) | 1990-09-12 | 1990-09-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9510990U JPH0453374U (en) | 1990-09-12 | 1990-09-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0453374U true JPH0453374U (en) | 1992-05-07 |
Family
ID=31833576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9510990U Pending JPH0453374U (en) | 1990-09-12 | 1990-09-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0453374U (en) |
-
1990
- 1990-09-12 JP JP9510990U patent/JPH0453374U/ja active Pending