JPS6438020U - - Google Patents
Info
- Publication number
- JPS6438020U JPS6438020U JP12941887U JP12941887U JPS6438020U JP S6438020 U JPS6438020 U JP S6438020U JP 12941887 U JP12941887 U JP 12941887U JP 12941887 U JP12941887 U JP 12941887U JP S6438020 U JPS6438020 U JP S6438020U
- Authority
- JP
- Japan
- Prior art keywords
- value
- attenuator
- series
- switch
- resistor
- 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.)
- Granted
Links
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Attenuators (AREA)
- Networks Using Active Elements (AREA)
Description
第１図ないし第３図は、それぞれ、実施例に係
るアクテイブフイルタ回路を示す回路図である。
第４図ないし第６図は、それぞれ、ＶＳＶＣ型の
ローパスフイルタを示す回路図である。第７図は
、従来のアクテイブフイルタ回路の一例を示す回
路図である。
２〜４……ＶＳＶＣ型のローパスフイルタ、２
０，３０，４０……演算増幅器、２１，３１，４
１……入力直列抵抗、２２，３２，４２……入力
並列抵抗、５……アツテネータ部、５ａ〜５ｄ…
…アツテネータユニツト、５１……直列抵抗、５
２……並列抵抗、５３……スイツチ。
1 to 3 are circuit diagrams showing active filter circuits according to embodiments, respectively.
4 to 6 are circuit diagrams showing VSVC type low-pass filters, respectively. FIG. 7 is a circuit diagram showing an example of a conventional active filter circuit. 2 to 4...VSVC type low pass filter, 2
0, 30, 40... operational amplifier, 21, 31, 4
1... Input series resistance, 22, 32, 42... Input parallel resistance, 5... Attenuator section, 5a to 5d...
...Attenuator unit, 51...Series resistance, 5
2...Parallel resistance, 53...Switch.
Claims (1)
力直列抵抗の代わりに、直列抵抗とスイツチをこ
の順で直列接続すると共に両者の接続点とアース
間に並列抵抗を接続して成る複数のアツテネータ
ユニツトを互いに並列接続したアツテネータ部を
接続し、各アツテネータユニツト内の直列抵抗の
値をＲ１とおき、そのスイツチをオンにした時に
それとアース間に入る全抵抗の合成値をＲ２とお
いた場合、 Ｒ０＝１（１／Ｒ１）＋（１／Ｒ２）で表され
る値Ｒ０を一定に保ちつつ、値Ｒ１／Ｒ２が各ア
ツテネータユニツトについて互いに異なるように
選ばれていることを特徴とするアクテイブフイル
タ回路。[Claim for Utility Model Registration] Instead of the input series resistor on the most input side of a VCVS type low-pass filter, a series resistor and a switch are connected in series in this order, and a parallel resistor is connected between the connection point of both and the ground. Connect the attenuator section consisting of multiple attenuator units connected in parallel to each other, set the value of the series resistance in each attenuator unit to R1 , and calculate the sum of all the resistances that enter between it and ground when the switch is turned on. When the value is R 2 , the value R 1 /R 2 is changed for each attenuator unit while keeping the value R 0 constant, which is expressed as R 0 = 1 (1/R 1 ) + ( 1 /R 2 ). Active filter circuits characterized in that they are selected differently from each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12941887U JPH0546348Y2 (en) | 1987-08-26 | 1987-08-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12941887U JPH0546348Y2 (en) | 1987-08-26 | 1987-08-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6438020U true JPS6438020U (en) | 1989-03-07 |
| JPH0546348Y2 JPH0546348Y2 (en) | 1993-12-03 |
Family
ID=31383675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12941887U Expired - Lifetime JPH0546348Y2 (en) | 1987-08-26 | 1987-08-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0546348Y2 (en) |
-
1987
- 1987-08-26 JP JP12941887U patent/JPH0546348Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0546348Y2 (en) | 1993-12-03 |
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