JPS58155175U - Video signal mute circuit - Google Patents
Video signal mute circuitInfo
- Publication number
- JPS58155175U JPS58155175U JP5068782U JP5068782U JPS58155175U JP S58155175 U JPS58155175 U JP S58155175U JP 5068782 U JP5068782 U JP 5068782U JP 5068782 U JP5068782 U JP 5068782U JP S58155175 U JPS58155175 U JP S58155175U
- Authority
- JP
- Japan
- Prior art keywords
- video signal
- signal
- capacitor
- input signal
- mute 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来のミュート回路を示す回路図、第２図は第
１図の回路における各部信号の波形図、第３図は本考案
の一実施例を示す回路図、第４図は第３図の回路におけ
る各部信号の波形図、である。
符号説明、１・・・映像出力トランジスタ、２・・・映
像出力トランジスタの負荷抵抗、３・・・結合コンτ゛
ンサ、４・・・負荷のインピーダンス、５・・・スイッ
チ、６・・・ＲＦ変調器、７・・・入力信号源の出力イ
ンピーダンス、８・・・ミュート用スイッチングトラン
ジスタ、９・・・コンデンサ１０への充電用抵抗、１０
・・・充電用コンデンサ。Fig. 1 is a circuit diagram showing a conventional mute circuit, Fig. 2 is a waveform diagram of various signals in the circuit of Fig. 1, Fig. 3 is a circuit diagram showing an embodiment of the present invention, and Fig. 4 is a FIG. 3 is a waveform diagram of various signals in the circuit shown in the figure. Explanation of symbols, 1... Video output transistor, 2... Load resistance of the video output transistor, 3... Coupling capacitor, 4... Load impedance, 5... Switch, 6... RF modulator, 7... Output impedance of input signal source, 8... Switching transistor for muting, 9... Resistor for charging the capacitor 10, 10
...Charging capacitor.
Claims (1)
ーダンスを介して出力トランジスタに導くようにして成
る映像信号再生装置において、前記出力インピーダンス
と出力トランジスタとの接続点をコンデンサと該コンデ
ンサへの充電抵抗とを介して一定電位源に接続し、前記
充電抵抗と並列に、ミュート信号によりオン、オフ制御
されるスイッチング素子を接続し、該スイッチング素子
がオフ状態にある通常時においては、前記コンデンサを
前記充電抵抗を介して入力信号である映像信号のはＳ゛
平均値に充電しておき、ミュート信号の印加により前記
スイッチング素子がオン状態に転じたときは、前記出力
トランジスタの入力信号を前記平均値に固定するように
したことを特徴とする映像信号ミュート回路。In a video signal reproducing device configured to take a reproduced video signal as an input signal and guide the input signal to an output transistor via an output impedance, a connection point between the output impedance and the output transistor is connected to a capacitor and a charging resistor to the capacitor. A switching element is connected in parallel with the charging resistor to a constant potential source, and is controlled to turn on and off by a mute signal, and in normal times when the switching element is in the off state, the capacitor is A video signal, which is an input signal, is charged to an average value of S through a charging resistor, and when the switching element is turned on by application of a mute signal, the input signal of the output transistor is changed to the average value. A video signal mute circuit characterized in that the video signal mute circuit is fixed at .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5068782U JPS58155175U (en) | 1982-04-09 | 1982-04-09 | Video signal mute circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5068782U JPS58155175U (en) | 1982-04-09 | 1982-04-09 | Video signal mute circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58155175U true JPS58155175U (en) | 1983-10-17 |
| JPS631501Y2 JPS631501Y2 (en) | 1988-01-14 |
Family
ID=30061471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5068782U Granted JPS58155175U (en) | 1982-04-09 | 1982-04-09 | Video signal mute circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58155175U (en) |
-
1982
- 1982-04-09 JP JP5068782U patent/JPS58155175U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS631501Y2 (en) | 1988-01-14 |
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