JPH0436322U - - Google Patents
Info
- Publication number
- JPH0436322U JPH0436322U JP7803490U JP7803490U JPH0436322U JP H0436322 U JPH0436322 U JP H0436322U JP 7803490 U JP7803490 U JP 7803490U JP 7803490 U JP7803490 U JP 7803490U JP H0436322 U JPH0436322 U JP H0436322U
- Authority
- JP
- Japan
- Prior art keywords
- fixed resistor
- resistor
- operational amplifier
- series circuit
- 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.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Control Of Amplification And Gain Control (AREA)
Description
第１図は本考案に係る増幅回路を示す回路図、
第２図及び第３図は従来の増幅回路の回路図であ
る。
ＯＰ……演算増幅器、Ｒ１〜Ｒ４……固定抵抗
器、Ｒｖ……可変抵抗器。
FIG. 1 is a circuit diagram showing an amplifier circuit according to the present invention,
2 and 3 are circuit diagrams of conventional amplifier circuits. OP... operational amplifier, R1 to R4... fixed resistor, Rv... variable resistor.
Claims (1)
を可変できるものにおいて、演算増幅器の出力を
第１の固定抵抗器と第２の固定抵抗器と可変抵抗
器の直列回路を介してグランドに接地すると共に
、第１の固定抵抗器と第２の固定抵抗器との接続
点から第３の固定抵抗器と第４の固定抵抗器の直
列回路を介してグランドに接地し、更に第３の固
定抵抗器と第４の固定抵抗器との接続点を演算増
幅器の負の入力端に接続したことを特徴とする演
算増幅器を用いた増幅回路。 In an amplifier circuit using an operational amplifier whose gain can be varied, the output of the operational amplifier is grounded through a series circuit of a first fixed resistor, a second fixed resistor, and a variable resistor. In addition, the connection point between the first fixed resistor and the second fixed resistor is grounded through a series circuit of the third fixed resistor and the fourth fixed resistor, and the third fixed resistor is further connected to the ground through the series circuit of the third fixed resistor and the fourth fixed resistor. 1. An amplifier circuit using an operational amplifier, characterized in that a connection point between the resistor and the fourth fixed resistor is connected to a negative input terminal of the operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7803490U JPH0436322U (en) | 1990-07-23 | 1990-07-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7803490U JPH0436322U (en) | 1990-07-23 | 1990-07-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0436322U true JPH0436322U (en) | 1992-03-26 |
Family
ID=31620957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7803490U Pending JPH0436322U (en) | 1990-07-23 | 1990-07-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0436322U (en) |
-
1990
- 1990-07-23 JP JP7803490U patent/JPH0436322U/ja active Pending
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