KR920011061A - Active filter circuit with adjustable cutoff frequency - Google Patents

Active filter circuit with adjustable cutoff frequency Download PDF

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Publication number
KR920011061A
KR920011061A KR1019900019365A KR900019365A KR920011061A KR 920011061 A KR920011061 A KR 920011061A KR 1019900019365 A KR1019900019365 A KR 1019900019365A KR 900019365 A KR900019365 A KR 900019365A KR 920011061 A KR920011061 A KR 920011061A
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KR
South Korea
Prior art keywords
filter circuit
active filter
passive element
resistor
capacitor
Prior art date
Application number
KR1019900019365A
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Korean (ko)
Inventor
송영원
Original Assignee
이헌조
주식회사 금성사
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.)
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Publication date
Application filed by 이헌조, 주식회사 금성사 filed Critical 이헌조
Priority to KR1019900019365A priority Critical patent/KR920011061A/en
Publication of KR920011061A publication Critical patent/KR920011061A/en

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Abstract

내용 없음No content

Description

차단주파수 가변조정이 가능한 능동필터회로Active filter circuit with adjustable cutoff frequency

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3도는 본 발명의 능동필터 회로도, 제4도는 본 발명 증폭용 차동증폭기의 상세회로도, 제5도는 본 발명 전달특성 가변제어용 차동증폭기의 상세회로도.3 is an active filter circuit diagram of the present invention, FIG. 4 is a detailed circuit diagram of the differential amplifier for amplification of the present invention, and FIG. 5 is a detailed circuit diagram of a differential amplifier for variable transmission control of the present invention.

Claims (5)

필터회로의 증폭용 차동증폭기의 입력측과 출력측 사이에 궤환되도록 연결 구성되어 전압이득을 가변시킬수 있는 전달특성 가변제어용 차동증폭기와, 상기 증폭용 차동증폭기의 입력측에 직렬 접속된 제1수동소자와, 상기 전달특성 가벽제어용 차동증폭기의 출력측에 직렬접속된 제2수동소자로 구성됨을 특징으로 하는 차단주파수 가변조정이 가능한 능동필터회로.A differential amplifier for variable transmission characteristic that is configured to be feedbacked between the input side and the output side of the amplification differential amplifier of the filter circuit to vary the voltage gain, a first passive element connected in series to the input side of the amplification differential amplifier, and An active filter circuit capable of varying the cutoff frequency, characterized in that it comprises a second passive element connected in series to the output side of the differential amplifier for controlling transfer characteristics. 제1항에 있어서, 상기 능동필터회로를 다단으로 직렬접속하여 구성함을 특징으로 하는 차단주파수 가변조정이 가능한 능동필터회로.The active filter circuit of claim 1, wherein the active filter circuit is configured by serially connecting the active filter circuits in multiple stages. 제1항에 있어서, 제1수동소자는 저항으로 제2수동소자는 콘덴서로 구성하여 로우패스필터를 구성함을 특징으로 하는 차단주파수 가변조정이 가능한 능동필터회로.The active filter circuit of claim 1, wherein the first passive element comprises a resistor, and the second passive element comprises a capacitor to form a low pass filter. 제1항에 있어서, 제1수동소자는 콘덴서로 제2수동소자는 저항으로 구성하여 하이패스필터를 구성함을 특징으로 하는 차단주파수 가변조정이 가능한 능동필터회로.The active filter circuit of claim 1, wherein the first passive element is a capacitor and the second passive element is a resistor to form a high pass filter. 제2항에 있어서, 2단으로 직렬 접속된 능동필터회로의 제1수동소자는 각각 콘덴서 및 저항으로 구성하고 제2수동소자는 각각 저항 및 콘덴서로 구성하여 대역필터를 구성함을 특징으로 하는 차단주파수 가변조정이 가능한 능동필터회로.3. The cut-off filter according to claim 2, wherein the first passive elements of the active filter circuit connected in series in two stages each comprise a capacitor and a resistor, and the second passive elements each comprise a resistor and a capacitor. Active filter circuit with adjustable frequency. ※ 참고사항 : 최초출원 내용에 의하여 공개되는 것임.※ Note: This is to be disclosed by the original application.
KR1019900019365A 1990-11-28 1990-11-28 Active filter circuit with adjustable cutoff frequency KR920011061A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019900019365A KR920011061A (en) 1990-11-28 1990-11-28 Active filter circuit with adjustable cutoff frequency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019900019365A KR920011061A (en) 1990-11-28 1990-11-28 Active filter circuit with adjustable cutoff frequency

Publications (1)

Publication Number Publication Date
KR920011061A true KR920011061A (en) 1992-06-27

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ID=67537627

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019900019365A KR920011061A (en) 1990-11-28 1990-11-28 Active filter circuit with adjustable cutoff frequency

Country Status (1)

Country Link
KR (1) KR920011061A (en)

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