JPS5630314A - Filter circuit - Google Patents

Filter circuit

Info

Publication number
JPS5630314A
JPS5630314A JP10557679A JP10557679A JPS5630314A JP S5630314 A JPS5630314 A JP S5630314A JP 10557679 A JP10557679 A JP 10557679A JP 10557679 A JP10557679 A JP 10557679A JP S5630314 A JPS5630314 A JP S5630314A
Authority
JP
Japan
Prior art keywords
terminal
signal
lpf
output signal
pass filter
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
JP10557679A
Other languages
Japanese (ja)
Inventor
Kiyoshi Amasawa
Takashi Taniyama
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.)
Faurecia Clarion Electronics Co Ltd
Original Assignee
Clarion Co 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 Clarion Co Ltd filed Critical Clarion Co Ltd
Priority to JP10557679A priority Critical patent/JPS5630314A/en
Publication of JPS5630314A publication Critical patent/JPS5630314A/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

Landscapes

  • Networks Using Active Elements (AREA)

Abstract

PURPOSE:To obtain two kinds of characteristics by one filter by obtaining characteristics reciprocal to filter characteristics by supplying the output of the filter to a differential amplifier. CONSTITUTION:An input signal to and output signal from low-pass filter LPF are supplied to differential amplifier A. Between the input and output signals of LPF, there is a difference equivalent to the decrement of the output signal. Therefore, differential amplifier A generates an output signal of high-pass filter characteristics. Thus, an output signal of low-pass filter characteristics appears at terminal O1, and the output signal of high-pass filter characteristics at terminal O2. When this circuit is applied to a noise eliminating circuit, the input signal to LPF has only the signal component passed through LPF and appearing at terminal O1 and the noise component appears at terminal O2. Thus, a signal for cutting a noise can easily be obtained at terminal O2.
JP10557679A 1979-08-21 1979-08-21 Filter circuit Pending JPS5630314A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10557679A JPS5630314A (en) 1979-08-21 1979-08-21 Filter circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10557679A JPS5630314A (en) 1979-08-21 1979-08-21 Filter circuit

Publications (1)

Publication Number Publication Date
JPS5630314A true JPS5630314A (en) 1981-03-26

Family

ID=14411334

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10557679A Pending JPS5630314A (en) 1979-08-21 1979-08-21 Filter circuit

Country Status (1)

Country Link
JP (1) JPS5630314A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01246912A (en) * 1988-03-29 1989-10-02 Mitsuba Electric Mfg Co Ltd Low-pass filter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01246912A (en) * 1988-03-29 1989-10-02 Mitsuba Electric Mfg Co Ltd Low-pass filter

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