JPH0461979U - - Google Patents
Info
- Publication number
- JPH0461979U JPH0461979U JP1990104616U JP10461690U JPH0461979U JP H0461979 U JPH0461979 U JP H0461979U JP 1990104616 U JP1990104616 U JP 1990104616U JP 10461690 U JP10461690 U JP 10461690U JP H0461979 U JPH0461979 U JP H0461979U
- Authority
- JP
- Japan
- Prior art keywords
- negative feedback
- video amplifier
- input terminal
- output terminals
- feedback input
- 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
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Control Of Amplification And Gain Control (AREA)
Description
第１図は本考案の一実施例を示すブロツク図、
第２図は従来のミユーテイング機能付映像増幅器
の一例を示すブロツク図である。
１……映像信号入力端子、２……映像信号出力
端子、３……制御信号入力端子、１１，２１……
映像増幅器、１２……アナログスイツチ、１３，
１４，２３……抵抗、２２……リレー。
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a block diagram showing an example of a conventional video amplifier with a muting function. 1...Video signal input terminal, 2...Video signal output terminal, 3...Control signal input terminal, 11, 21...
Video amplifier, 12...Analog switch, 13,
14, 23...Resistor, 22...Relay.
Claims (1)
信号に応じて２つの出力端の内いずれか一方を選
択して前記映像増幅器の出力信号を送出するアナ
ログスイツチと、前記２つの出力端の一方と前記
負帰還用入力端子との間に接続された第１の抵抗
と、前記２つの出力端の他方と前記負帰還用入力
端子との間に接続された第２の抵抗とを備え、前
記第１および第２の抵抗により負帰還量を変化さ
せて前記映像増幅器の出力信号を抑圧することを
特徴とするミユーテイング機能付映像増幅器。 a video amplifier having a negative feedback input terminal; an analog switch that selects one of two output terminals according to a control signal and sends an output signal of the video amplifier; and one of the two output terminals. a first resistor connected between the negative feedback input terminal and a second resistor connected between the other of the two output terminals and the negative feedback input terminal; A video amplifier with a muting function, characterized in that the output signal of the video amplifier is suppressed by changing the amount of negative feedback using the first and second resistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990104616U JPH0461979U (en) | 1990-10-04 | 1990-10-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990104616U JPH0461979U (en) | 1990-10-04 | 1990-10-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0461979U true JPH0461979U (en) | 1992-05-27 |
Family
ID=31849965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990104616U Pending JPH0461979U (en) | 1990-10-04 | 1990-10-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0461979U (en) |
-
1990
- 1990-10-04 JP JP1990104616U patent/JPH0461979U/ja active Pending