IL80515A - Enhanced quadrature notch filter - Google Patents

Enhanced quadrature notch filter

Info

Publication number
IL80515A
IL80515A IL80515A IL8051586A IL80515A IL 80515 A IL80515 A IL 80515A IL 80515 A IL80515 A IL 80515A IL 8051586 A IL8051586 A IL 8051586A IL 80515 A IL80515 A IL 80515A
Authority
IL
Israel
Prior art keywords
notch filter
enhanced
quadrature notch
enhanced quadrature
filter
Prior art date
Application number
IL80515A
Other languages
English (en)
Original Assignee
Hughes Aircraft Co
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 Hughes Aircraft Co filed Critical Hughes Aircraft Co
Publication of IL80515A publication Critical patent/IL80515A/xx

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H19/00—Networks using time-varying elements, e.g. N-path filters
IL80515A 1985-12-10 1986-11-05 Enhanced quadrature notch filter IL80515A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/807,391 US4731587A (en) 1985-12-10 1985-12-10 Enhanced quadrature notch filter

Publications (1)

Publication Number Publication Date
IL80515A true IL80515A (en) 1990-07-26

Family

ID=25196264

Family Applications (1)

Application Number Title Priority Date Filing Date
IL80515A IL80515A (en) 1985-12-10 1986-11-05 Enhanced quadrature notch filter

Country Status (6)

Country Link
US (1) US4731587A (ja)
EP (1) EP0249623B1 (ja)
JP (1) JPS63502133A (ja)
DE (1) DE3683153D1 (ja)
IL (1) IL80515A (ja)
WO (1) WO1987003757A1 (ja)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4928315A (en) * 1987-12-21 1990-05-22 Hughes Aircraft Company Chirped backscatter filter
US4947361A (en) * 1988-09-28 1990-08-07 Unisys Corporation Narrowband parameter estimator
US5262836A (en) * 1991-12-19 1993-11-16 Hughes Aircraft Company Coherent double homodyne optical backscatter filter
US5404172A (en) * 1992-03-02 1995-04-04 Eeg Enterprises, Inc. Video signal data and composite synchronization extraction circuit for on-screen display
US5721521A (en) * 1996-08-05 1998-02-24 Lucent Technologies Inc. Notch-enhancement in band-reject filters
US6636128B2 (en) 2001-06-07 2003-10-21 The United States Of America As Represented By The Secretary Of The Navy Frequency-tunable notch filter
US8526903B2 (en) * 2008-03-11 2013-09-03 Qualcomm, Incorporated High-linearity receiver with transmit leakage cancellation
US7965134B2 (en) * 2009-03-27 2011-06-21 Qualcomm, Incorporated Spur attenuation devices, systems, and methods
WO2011036331A1 (en) * 2009-09-22 2011-03-31 Nokia Corporation Adjustable circuit architecture
CN101976764A (zh) * 2010-11-10 2011-02-16 中国舰船研究设计中心 共址耦合干扰跟踪对消装置
US9425840B2 (en) 2013-04-26 2016-08-23 Northrop Grumman Systems Corporation Wideband tunable notch cancellation

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3202990A (en) * 1959-05-04 1965-08-24 Gen Electric Intermediate frequency side-lobe canceller
US3355668A (en) * 1963-09-30 1967-11-28 Bendix Corp Tunable notch filter
US3353147A (en) * 1966-03-18 1967-11-14 Jr George W Meeker Close-in target electronic cancellation device
US3659212A (en) * 1970-06-16 1972-04-25 Honeywell Inc Notch filter
US3633117A (en) * 1970-07-29 1972-01-04 Itt Suppression of a phase-sensitive spectral component from a signal
JPS5641010B2 (ja) * 1972-06-14 1981-09-25
DE2316436C2 (de) * 1973-04-02 1975-03-27 Siemens Ag, 1000 Berlin Und 8000 Muenchen Frequenzfilter mit einer aus zwei parallelen Filterzweigen bestehenden und durch einen Frequenzgenerator gesteuerten Filterschaltung
US4381508A (en) * 1979-03-12 1983-04-26 Motorola Inc. Clutter compensated sidelobe cancelling communications system

Also Published As

Publication number Publication date
EP0249623B1 (en) 1991-12-27
US4731587A (en) 1988-03-15
DE3683153D1 (de) 1992-02-06
JPS63502133A (ja) 1988-08-18
EP0249623A1 (en) 1987-12-23
WO1987003757A1 (en) 1987-06-18

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Legal Events

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KB Patent renewed
MM9K Patent not in force due to non-payment of renewal fees