JPS56144621A - Band-pass filter - Google Patents

Band-pass filter

Info

Publication number
JPS56144621A
JPS56144621A JP4766080A JP4766080A JPS56144621A JP S56144621 A JPS56144621 A JP S56144621A JP 4766080 A JP4766080 A JP 4766080A JP 4766080 A JP4766080 A JP 4766080A JP S56144621 A JPS56144621 A JP S56144621A
Authority
JP
Japan
Prior art keywords
band
pass filter
interference wave
main signal
narrow
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
JP4766080A
Other languages
Japanese (ja)
Inventor
Isao Ogata
Akira Nishimura
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 JP4766080A priority Critical patent/JPS56144621A/en
Publication of JPS56144621A publication Critical patent/JPS56144621A/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

Abstract

PURPOSE:To eliminate an interference wave without exerting an evil influence upon transmission characteristics to a main signal by canceling an interference wave, extracted through a narrow-band-pass filter, by adding the interference wave to a main signal passed through a wide-band-pass filter while they are put out of phase with each other. CONSTITUTION:An input signal passed through input amplifier 11 is branched into two parts via matching resistances 12 and 13 and they are inputted to wide-band- pass filter 14 and narrow-band-pass filter 15. Through wide-band-pass filter 14, the main signal is passed with sufficient band width and less distortion and then inputted to variable attenuator 16. Narrow-band-pass filter 15 extracts an interference wave with sufficiently narrow band width and inputs it to variable phase shifter 17. The main signal which is the output of variable attenuator 16 and the interference wave which is the output of variable phase shifter 17 are mixed after passing through matching resistances 18 and 19 to cancel and eliminate the interference wave in the main signal. The main signal eliminated the interference wave is outputted via output amplifier 20.
JP4766080A 1980-04-11 1980-04-11 Band-pass filter Pending JPS56144621A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4766080A JPS56144621A (en) 1980-04-11 1980-04-11 Band-pass filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4766080A JPS56144621A (en) 1980-04-11 1980-04-11 Band-pass filter

Publications (1)

Publication Number Publication Date
JPS56144621A true JPS56144621A (en) 1981-11-11

Family

ID=12781407

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4766080A Pending JPS56144621A (en) 1980-04-11 1980-04-11 Band-pass filter

Country Status (1)

Country Link
JP (1) JPS56144621A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1079601A (en) * 1996-09-02 1998-03-24 Nec Corp Filter
EP2733781A1 (en) * 2012-11-16 2014-05-21 Alcatel-Lucent A filter assembly and a method of filtering

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1079601A (en) * 1996-09-02 1998-03-24 Nec Corp Filter
EP2733781A1 (en) * 2012-11-16 2014-05-21 Alcatel-Lucent A filter assembly and a method of filtering
WO2014075760A1 (en) * 2012-11-16 2014-05-22 Alcatel Lucent A filter assembly and a method of filtering
US9887688B2 (en) 2012-11-16 2018-02-06 Provenance Asset Group Llc Filter assembly and a method of filtering

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