JPH03130615U - - Google Patents
Info
- Publication number
- JPH03130615U JPH03130615U JP3895990U JP3895990U JPH03130615U JP H03130615 U JPH03130615 U JP H03130615U JP 3895990 U JP3895990 U JP 3895990U JP 3895990 U JP3895990 U JP 3895990U JP H03130615 U JPH03130615 U JP H03130615U
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- switch
- switching type
- gain switching
- type amplifier
- 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
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Control Of Amplification And Gain Control (AREA)
Description
第1図は本考案の利得切替型増幅回路の概念図
、第2図は従来の利得切替型増幅回路の概念図で
ある。 A……増幅回路、I1〜I3……直流電流源、
D1〜D4……ダイオード、Rf……帰還抵抗、
Rf′……抵抗、S1,S2……スイツチ、VE
E……最低電位、Vcc……最高電位。
、第2図は従来の利得切替型増幅回路の概念図で
ある。 A……増幅回路、I1〜I3……直流電流源、
D1〜D4……ダイオード、Rf……帰還抵抗、
Rf′……抵抗、S1,S2……スイツチ、VE
E……最低電位、Vcc……最高電位。
Claims (1)
- 抵抗を通して負帰還するトランスインピーダン
ス型増幅回路において、直流電流源と、スイツチ
及びダイオードブリツジから成るスイツチ回路と
、抵抗とを直列接続したことを特徴とする利得切
替型増幅回路。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3895990U JPH03130615U (ja) | 1990-04-10 | 1990-04-10 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3895990U JPH03130615U (ja) | 1990-04-10 | 1990-04-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH03130615U true JPH03130615U (ja) | 1991-12-27 |
Family
ID=31547431
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3895990U Pending JPH03130615U (ja) | 1990-04-10 | 1990-04-10 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH03130615U (ja) |
-
1990
- 1990-04-10 JP JP3895990U patent/JPH03130615U/ja active Pending