EP1250759A4 - Aus zwei filtern hergestellter bandpassfilter - Google Patents

Aus zwei filtern hergestellter bandpassfilter

Info

Publication number
EP1250759A4
EP1250759A4 EP00986432A EP00986432A EP1250759A4 EP 1250759 A4 EP1250759 A4 EP 1250759A4 EP 00986432 A EP00986432 A EP 00986432A EP 00986432 A EP00986432 A EP 00986432A EP 1250759 A4 EP1250759 A4 EP 1250759A4
Authority
EP
European Patent Office
Prior art keywords
filters
pass filter
band pass
band
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.)
Withdrawn
Application number
EP00986432A
Other languages
English (en)
French (fr)
Other versions
EP1250759A1 (de
Inventor
Samuel L Thomasson
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.)
Acoustic Technologies Inc
Original Assignee
Acoustic Technologies Inc
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
Priority claimed from US09/491,998 external-priority patent/US6492865B1/en
Application filed by Acoustic Technologies Inc filed Critical Acoustic Technologies Inc
Publication of EP1250759A1 publication Critical patent/EP1250759A1/de
Publication of EP1250759A4 publication Critical patent/EP1250759A4/de
Withdrawn legal-status Critical Current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
    • H03H11/1295—Parallel-T filters
    • 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
    • H03H11/1217—Frequency selective two-port networks using amplifiers with feedback using a plurality of operational amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/04—Recursive filters
    • 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
    • H03H19/004—Switched capacitor networks
EP00986432A 2000-01-26 2000-12-15 Aus zwei filtern hergestellter bandpassfilter Withdrawn EP1250759A4 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US491998 1990-03-12
US09/491,998 US6492865B1 (en) 1999-12-17 2000-01-26 Band pass filter from two filters
PCT/US2000/034077 WO2001056157A1 (en) 2000-01-26 2000-12-15 Band pass filter from two filters

Publications (2)

Publication Number Publication Date
EP1250759A1 EP1250759A1 (de) 2002-10-23
EP1250759A4 true EP1250759A4 (de) 2004-12-15

Family

ID=23954533

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00986432A Withdrawn EP1250759A4 (de) 2000-01-26 2000-12-15 Aus zwei filtern hergestellter bandpassfilter

Country Status (2)

Country Link
EP (1) EP1250759A4 (de)
WO (1) WO2001056157A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1274184C (zh) * 2001-09-21 2006-09-06 西门子公司 在电声变换器中控制音频信号的低音放音的方法和装置
EP1326334A3 (de) * 2002-01-04 2004-08-18 Siemens Gebäudesicherheit GmbH & Co. OHG Aktive RC-Filter-Schaltungsanordnung
TWI420326B (zh) * 2007-05-31 2013-12-21 Min Syong Lin 單頻及帶通濾波器

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999056339A1 (en) * 1998-04-30 1999-11-04 The Governement Of The United States Of America As Represented By The Secretary Of The Navy Microwave channelized bandpass filter having two channels

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE48278C (de) * 1970-07-17 E. CA-REZ in Brüssel, Nr. 72 Rue du Marais Neuerung bei dem Verfahren zur Darstellung von Ammoniumnitrat durch Umsetzen von Bariumnitrat mit Ammoniumsulfat
US4984292A (en) * 1988-09-28 1991-01-08 Correpro (Canada) Inc. Bandpass amplifier and receiver using bandpass amplifier
US5930374A (en) * 1996-10-17 1999-07-27 Aphex Systems, Ltd. Phase coherent crossover
US6020783A (en) * 1998-06-05 2000-02-01 Signal Technology Corporation RF notch filter having multiple notch and variable notch frequency characteristics

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999056339A1 (en) * 1998-04-30 1999-11-04 The Governement Of The United States Of America As Represented By The Secretary Of The Navy Microwave channelized bandpass filter having two channels

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
M. GILISSEN: "Filtre passe-bande à haute séliectivité avec réjection de bruit.", ELECTRONIQUE ET APPLICATIONS INDUSTRIELLES., no. 262s, January 1979 (1979-01-01), FRSOCIETE DES EDITIONS RADIO. PARIS., pages 41 - 43, XP002301087 *
See also references of WO0156157A1 *

Also Published As

Publication number Publication date
WO2001056157A1 (en) 2001-08-02
EP1250759A1 (de) 2002-10-23

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Legal Events

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