JPH0226810U - - Google Patents
Info
- Publication number
- JPH0226810U JPH0226810U JP10421288U JP10421288U JPH0226810U JP H0226810 U JPH0226810 U JP H0226810U JP 10421288 U JP10421288 U JP 10421288U JP 10421288 U JP10421288 U JP 10421288U JP H0226810 U JPH0226810 U JP H0226810U
- Authority
- JP
- Japan
- Prior art keywords
- input terminal
- amplifier
- switch
- impedance matching
- supply line
- 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
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Amplifiers (AREA)
Description
第１図は本考案の一実施例を示す図、第２図は
従来例を示す図である。
２……インピーダンス整合用抵抗、４……増幅
器、１０……入力端子、１１……スイツチ。
FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing a conventional example. 2... Impedance matching resistor, 4 ... Amplifier, 10... Input terminal, 11... Switch.
Claims (1)
るスイツチを備えた入力端子と、この入力端子に
接続されたインピーダンス整合用抵抗と、前記入
力端子より印加された信号を増幅する増幅器と、
前記スイツチの端子と増幅器の入力端とを接続す
る手段とを備え、前記信号供給線が前記入力端子
に接続されていないとき、前記スイツチをオンす
ることにより前記インピーダンス整合用抵抗を前
記増幅器の入力端と基準電位点間に接続するよう
にしたことを特徴とする増幅器の入力回路。 an input terminal equipped with a switch that is turned on and off in response to insertion and removal of a signal supply line; an impedance matching resistor connected to the input terminal; and an amplifier that amplifies the signal applied from the input terminal.
means for connecting the terminal of the switch and the input terminal of the amplifier, and when the signal supply line is not connected to the input terminal, turning on the switch connects the impedance matching resistor to the input terminal of the amplifier. An input circuit for an amplifier, characterized in that the input circuit is connected between an end and a reference potential point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10421288U JPH0226810U (en) | 1988-08-05 | 1988-08-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10421288U JPH0226810U (en) | 1988-08-05 | 1988-08-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0226810U true JPH0226810U (en) | 1990-02-21 |
Family
ID=31335731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10421288U Pending JPH0226810U (en) | 1988-08-05 | 1988-08-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0226810U (en) |
-
1988
- 1988-08-05 JP JP10421288U patent/JPH0226810U/ja active Pending