JPS6452315U - - Google Patents
Info
- Publication number
- JPS6452315U JPS6452315U JP14852187U JP14852187U JPS6452315U JP S6452315 U JPS6452315 U JP S6452315U JP 14852187 U JP14852187 U JP 14852187U JP 14852187 U JP14852187 U JP 14852187U JP S6452315 U JPS6452315 U JP S6452315U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- operational amplifier
- inverting input
- output
- input section
- 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
- 239000003990 capacitor Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Networks Using Active Elements (AREA)
Description
第１図は本考案の一実施例に係るアクテイブフ
イルタ回路の回路図、第２図ａおよびｂはそれぞ
れ第１図の負帰還抵抗回路の各変形例を示す回路
図である。第３図は従来例のアクテイブフイルタ
回路の回路図である。
１２……入力端、１４……振幅イコライザ特性
調整回路、１６……負帰還抵抗回路、Ｒ９，Ｒ１
０，Ｒ１１，Ｒ１２，Ｒ１３，Ｒ１４……負帰還
抵抗、ＳＷ′……切換スイツチ。
FIG. 1 is a circuit diagram of an active filter circuit according to an embodiment of the present invention, and FIGS. 2a and 2b are circuit diagrams showing modifications of the negative feedback resistor circuit of FIG. 1, respectively. FIG. 3 is a circuit diagram of a conventional active filter circuit. 12...Input terminal, 14...Amplitude equalizer characteristic adjustment circuit, 16...Negative feedback resistance circuit, R9, R1
0, R11, R12, R13, R14... Negative feedback resistance, SW'... Changeover switch.
Claims (1)
る演算増幅器と、入力端と前記演算増幅器の反転
入力部との間に接続された、抵抗およびコンデン
サで構成された振幅イコライザ特性調整回路と、
前記演算増幅器の反転入力部と出力部との間に接
続された負帰還抵抗回路とで構成された振幅イコ
ライザ回路と、 前記振幅イコライザ回路の出力のゲインを切り
換える切換回路とで構成されたアクテイブフイル
タ回路において、 前記負帰還抵抗回路を複数の負帰還抵抗と、前
記負帰還抵抗と前記演算増幅器の出力ゲインに応
じて選択的にその演算増幅器の反転入力部と出力
との間に接続させる切換スイツチとで構成したこ
とを特徴とするアクテイブフイルタ回路。[Claims for Utility Model Registration] An operational amplifier comprising an inverting input section, a non-inverting input section, and an output section, and a resistor and a capacitor connected between the input terminal and the inverting input section of the operational amplifier. An amplitude equalizer characteristic adjustment circuit,
an active filter comprising an amplitude equalizer circuit comprising a negative feedback resistance circuit connected between an inverting input section and an output section of the operational amplifier; and a switching circuit for switching the gain of the output of the amplitude equalizer circuit. In the circuit, a changeover switch selectively connects the negative feedback resistor circuit between a plurality of negative feedback resistors and an inverting input section and an output of the operational amplifier according to an output gain of the negative feedback resistor and the operational amplifier. An active filter circuit comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14852187U JPS6452315U (en) | 1987-09-28 | 1987-09-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14852187U JPS6452315U (en) | 1987-09-28 | 1987-09-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6452315U true JPS6452315U (en) | 1989-03-31 |
Family
ID=31419915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14852187U Pending JPS6452315U (en) | 1987-09-28 | 1987-09-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6452315U (en) |
-
1987
- 1987-09-28 JP JP14852187U patent/JPS6452315U/ja active Pending