CA2069639A1 - Active filter circuit - Google Patents

Active filter circuit

Info

Publication number
CA2069639A1
CA2069639A1 CA 2069639 CA2069639A CA2069639A1 CA 2069639 A1 CA2069639 A1 CA 2069639A1 CA 2069639 CA2069639 CA 2069639 CA 2069639 A CA2069639 A CA 2069639A CA 2069639 A1 CA2069639 A1 CA 2069639A1
Authority
CA
Canada
Prior art keywords
signal
filter
frequency
filter circuit
bandwidth
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.)
Abandoned
Application number
CA 2069639
Other languages
English (en)
French (fr)
Inventor
Joseph P. Heck
Barry L. Jason
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.)
Motorola Solutions Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2069639A1 publication Critical patent/CA2069639A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/16—Multiple-frequency-changing
    • H03D7/161—Multiple-frequency-changing all the frequency changers being connected in cascade
    • H03D7/163—Multiple-frequency-changing all the frequency changers being connected in cascade the local oscillations of at least two of the frequency changers being derived from a single oscillator
    • 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
    • H03H11/0422—Frequency selective two-port networks using transconductance amplifiers, e.g. gmC filters
    • H03H11/0444—Simulation of ladder networks
    • H03H11/045—Leapfrog structures

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Networks Using Active Elements (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transmitters (AREA)
  • Noise Elimination (AREA)
CA 2069639 1990-10-10 1991-08-19 Active filter circuit Abandoned CA2069639A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US59506290A 1990-10-10 1990-10-10
US595,062 1990-10-10

Publications (1)

Publication Number Publication Date
CA2069639A1 true CA2069639A1 (en) 1992-04-11

Family

ID=24381563

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2069639 Abandoned CA2069639A1 (en) 1990-10-10 1991-08-19 Active filter circuit

Country Status (8)

Country Link
JP (1) JPH05503409A (zh)
AR (1) AR246644A1 (zh)
BR (1) BR9106178A (zh)
CA (1) CA2069639A1 (zh)
DE (1) DE4192545T (zh)
GB (2) GB2284718A (zh)
MX (1) MX9101511A (zh)
WO (1) WO1992007422A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6489847B1 (en) 2000-01-28 2002-12-03 Telefonaktiebolaget Lm Ericsson Low distoration driving amplifier for integrated filters
GB2394133A (en) 2002-10-17 2004-04-14 Toumaz Technology Ltd Radio receiver with reconfigurable filtering arrangement

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB491693A (en) * 1937-01-21 1938-09-07 Hazeltine Corp Improvements in variable selectivity radio receivers
GB856892A (en) * 1957-11-14 1960-12-21 Collins Radio Co Means for reducing the threshold of angular-modulation receivers
US3805091A (en) * 1972-06-15 1974-04-16 Arp Instr Frequency sensitive circuit employing variable transconductance circuit
US4374335A (en) * 1980-05-19 1983-02-15 Precision Monolithics, Inc. Tuneable I.C. active integrator
US4356658A (en) * 1981-02-11 1982-11-02 Goldfarb Adolph E Multiple and varied motion stage apparatus for doll figure
US4356657A (en) * 1981-02-11 1982-11-02 Adolph E. Goldfarb Toy car wash apparatus and method
CA1190289A (en) * 1981-04-28 1985-07-09 Nippon Hoso Kyokai Fm signal demodulation system
MX151558A (es) * 1981-08-31 1984-12-13 Oki Electric Ind Co Ltd Mejoras a sistema de demodulacion de alta sensibilidad de senales de f.m. de television
US4527187A (en) * 1981-08-31 1985-07-02 Oki Electric Industry Co., Ltd. High sensitivity FM signal demodulation system
IT1212744B (it) * 1983-05-19 1989-11-30 Sogs Ates Componenti Elettroni Circuito per l'attenuazione dei disturbi in un radioricevitore mediante l'impiego di un filtro passa-basso a banda passante regolabile.
US4591805A (en) * 1984-05-30 1986-05-27 General Electric Company Adaptive bandwidth amplifier
US4839542A (en) * 1984-08-21 1989-06-13 General Datacomm Industries, Inc. Active transconductance filter device
DE3737581A1 (de) * 1987-11-05 1989-05-18 Grundig Emv Einrichtung zum automatischen anlegen der abgleichspannungen an die abstimmbaren schaltungselemente des zf-verstaerkers eines fernsehempfaengers
JPH02186723A (ja) * 1988-08-25 1990-07-23 Nec Corp 受信機
US5051628A (en) * 1990-01-02 1991-09-24 Motorola, Inc. Integrated filter circuit

Also Published As

Publication number Publication date
MX9101511A (es) 1992-06-05
DE4192545T (zh) 1992-10-08
AR246644A1 (es) 1994-08-31
GB2255461B (en) 1995-06-14
BR9106178A (pt) 1993-03-16
GB9212049D0 (en) 1992-08-12
GB9503349D0 (en) 1995-04-12
WO1992007422A1 (en) 1992-04-30
JPH05503409A (ja) 1993-06-03
GB2255461A (en) 1992-11-04
GB2284718A (en) 1995-06-14

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Legal Events

Date Code Title Description
EEER Examination request
FZDE Dead