BR9106178A - Circuito de filtro ativo - Google Patents

Circuito de filtro ativo

Info

Publication number
BR9106178A
BR9106178A BR919106178A BR9106178A BR9106178A BR 9106178 A BR9106178 A BR 9106178A BR 919106178 A BR919106178 A BR 919106178A BR 9106178 A BR9106178 A BR 9106178A BR 9106178 A BR9106178 A BR 9106178A
Authority
BR
Brazil
Prior art keywords
filter circuit
active filter
active
circuit
filter
Prior art date
Application number
BR919106178A
Other languages
English (en)
Portuguese (pt)
Inventor
Joseph P Heck
Barry L Jason
Original Assignee
Motorola 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
Application filed by Motorola Inc filed Critical Motorola Inc
Publication of BR9106178A publication Critical patent/BR9106178A/pt

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)
  • Mobile Radio Communication Systems (AREA)
  • Transmitters (AREA)
  • Networks Using Active Elements (AREA)
  • Noise Elimination (AREA)
BR919106178A 1990-10-10 1991-08-19 Circuito de filtro ativo BR9106178A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US59506290A 1990-10-10 1990-10-10
PCT/US1991/005876 WO1992007422A1 (en) 1990-10-10 1991-08-19 Active filter circuit

Publications (1)

Publication Number Publication Date
BR9106178A true BR9106178A (pt) 1993-03-16

Family

ID=24381563

Family Applications (1)

Application Number Title Priority Date Filing Date
BR919106178A BR9106178A (pt) 1990-10-10 1991-08-19 Circuito de filtro ativo

Country Status (8)

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

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
US4356657A (en) * 1981-02-11 1982-11-02 Adolph E. Goldfarb Toy car wash apparatus and method
US4356658A (en) * 1981-02-11 1982-11-02 Goldfarb Adolph E Multiple and varied motion stage apparatus for doll figure
CA1190289A (en) * 1981-04-28 1985-07-09 Nippon Hoso Kyokai Fm signal demodulation system
EP0086839B1 (en) * 1981-08-31 1986-12-03 Oki Electric Industry Company, Limited High-sensitivity fm demodulating system
EP0086838B1 (en) * 1981-08-31 1986-11-20 Oki Electric Industry Company, Limited 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
GB2255461A (en) 1992-11-04
GB2284718A (en) 1995-06-14
GB9212049D0 (en) 1992-08-12
GB2255461B (en) 1995-06-14
DE4192545T (ja) 1992-10-08
MX9101511A (es) 1992-06-05
CA2069639A1 (en) 1992-04-11
AR246644A1 (es) 1994-08-31
GB9503349D0 (en) 1995-04-12
WO1992007422A1 (en) 1992-04-30
JPH05503409A (ja) 1993-06-03

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Legal Events

Date Code Title Description
KF Request for proof of payment of annual fee
FD5 Application fees: dismissal - article 86 of industrial property law