JPS5631214A - Active filter - Google Patents

Active filter

Info

Publication number
JPS5631214A
JPS5631214A JP10775579A JP10775579A JPS5631214A JP S5631214 A JPS5631214 A JP S5631214A JP 10775579 A JP10775579 A JP 10775579A JP 10775579 A JP10775579 A JP 10775579A JP S5631214 A JPS5631214 A JP S5631214A
Authority
JP
Japan
Prior art keywords
capacitor
point
circuit
omega1
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
Application number
JP10775579A
Other languages
Japanese (ja)
Inventor
Michio Matsuura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP10775579A priority Critical patent/JPS5631214A/en
Publication of JPS5631214A publication Critical patent/JPS5631214A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H03H11/126—Frequency selective two-port networks using amplifiers with feedback using a single operational amplifier

Landscapes

  • Networks Using Active Elements (AREA)

Abstract

PURPOSE:To suppress the influence of the output impedance of an amplifier, by inserting a capacitor between the connection point, where the feed back circuit including a capacitor is connected, and the earth point. CONSTITUTION:A CR filter circuit is provided in the input side to provide the feedback circuit dependent upon capacitor C1 from the output side of amplifier K. Capacitor Cx is connected betweem the input-side connection point, where the feedback is connected, and the earth point. Cosequently, cut-off point omega1 is a<1/2> times as high as the conventional circuit, and simultaneously, the value of omega0/omega1 becmoes larger by a<-1/2>. Therefore, the attenuation curve of the low-pass filter approaches an ideal one furthermore.
JP10775579A 1979-08-24 1979-08-24 Active filter Pending JPS5631214A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10775579A JPS5631214A (en) 1979-08-24 1979-08-24 Active filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10775579A JPS5631214A (en) 1979-08-24 1979-08-24 Active filter

Publications (1)

Publication Number Publication Date
JPS5631214A true JPS5631214A (en) 1981-03-30

Family

ID=14467149

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10775579A Pending JPS5631214A (en) 1979-08-24 1979-08-24 Active filter

Country Status (1)

Country Link
JP (1) JPS5631214A (en)

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