FR2399159A1 - ACTIVE FILTER, THIRD ORDER, WITH INDEPENDENT ADJUSTABLE PARAMETERS, AND PROCESS FOR ADJUSTING THE SAID FILTER - Google Patents

ACTIVE FILTER, THIRD ORDER, WITH INDEPENDENT ADJUSTABLE PARAMETERS, AND PROCESS FOR ADJUSTING THE SAID FILTER

Info

Publication number
FR2399159A1
FR2399159A1 FR7723259A FR7723259A FR2399159A1 FR 2399159 A1 FR2399159 A1 FR 2399159A1 FR 7723259 A FR7723259 A FR 7723259A FR 7723259 A FR7723259 A FR 7723259A FR 2399159 A1 FR2399159 A1 FR 2399159A1
Authority
FR
France
Prior art keywords
filter
active
adjusting
order
capacitor
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Withdrawn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
FR7723259A
Other languages
French (fr)
Inventor
Jean Pierre Georges Charil
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.)
Association des Ouvriers en Instruments de Precision
Original Assignee
Association des Ouvriers en Instruments de Precision
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 Association des Ouvriers en Instruments de Precision filed Critical Association des Ouvriers en Instruments de Precision
Priority to FR7723259A priority Critical patent/FR2399159A1/en
Priority to DE19782831107 priority patent/DE2831107A1/en
Priority to GB7830114A priority patent/GB2002193A/en
Priority to BE189545A priority patent/BE869326A/en
Publication of FR2399159A1 publication Critical patent/FR2399159A1/en
Withdrawn legal-status Critical Current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
    • H03H11/126—Frequency selective two-port networks using amplifiers with feedback using a single operational amplifier
    • 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
    • H03H11/126—Frequency selective two-port networks using amplifiers with feedback using a single operational amplifier
    • H03H11/1286—Sallen-Key biquad

Abstract

L'invention concerne un filtre actif passe-bas du troisième ordre. Ce filtre comprend une cellule en T, R 1 , R2 , C1 , connectée à une entrée d'un amplificateur opérationnel A à travers une résistance R3 , un condensateur C 2 de contre-réaction, un condensateur C3 en parallèle sur l'entrée de A, et une résistance R4 , en parallèle sur le condensateur C1 de la cellule en T. Ce filtre actif, qui peut être avantageusement réalisé en technologie hybride, et dont les paramètres peuvent être réglés de façon indépendante en ajustant successivement R3 , R2 , le gain de A, puis R4 et R1 , peut être utilisé comme filtre de modulation ou de démodulation dans un dispositif d'émission et de réception d'impulsions téléphoniques codées.The invention relates to an active third order low pass filter. This filter comprises a T cell, R 1, R2, C1, connected to an input of an operational amplifier A through a resistor R3, a feedback capacitor C 2, a capacitor C3 in parallel on the input of A, and a resistor R4, in parallel with the capacitor C1 of the cell in T. This active filter, which can be advantageously produced in hybrid technology, and whose parameters can be adjusted independently by successively adjusting R3, R2, the gain of A, then R4 and R1, can be used as a modulation or demodulation filter in a device for transmitting and receiving coded telephone pulses.

FR7723259A 1977-07-28 1977-07-28 ACTIVE FILTER, THIRD ORDER, WITH INDEPENDENT ADJUSTABLE PARAMETERS, AND PROCESS FOR ADJUSTING THE SAID FILTER Withdrawn FR2399159A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR7723259A FR2399159A1 (en) 1977-07-28 1977-07-28 ACTIVE FILTER, THIRD ORDER, WITH INDEPENDENT ADJUSTABLE PARAMETERS, AND PROCESS FOR ADJUSTING THE SAID FILTER
DE19782831107 DE2831107A1 (en) 1977-07-28 1978-07-14 THIRD-PARTY ACTIVE FILTERS AND PROCEDURE FOR REGULATING THEREOF
GB7830114A GB2002193A (en) 1977-07-28 1978-07-17 Active low-pass filters
BE189545A BE869326A (en) 1977-07-28 1978-07-27 ACTIVE FILTER, OF THE THIRD ORDER, WITH INDEPENDENT ADJUSTABLE PARAMETERS AND METHOD FOR ADJUSTING THE SAID FILTER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7723259A FR2399159A1 (en) 1977-07-28 1977-07-28 ACTIVE FILTER, THIRD ORDER, WITH INDEPENDENT ADJUSTABLE PARAMETERS, AND PROCESS FOR ADJUSTING THE SAID FILTER

Publications (1)

Publication Number Publication Date
FR2399159A1 true FR2399159A1 (en) 1979-02-23

Family

ID=9193938

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7723259A Withdrawn FR2399159A1 (en) 1977-07-28 1977-07-28 ACTIVE FILTER, THIRD ORDER, WITH INDEPENDENT ADJUSTABLE PARAMETERS, AND PROCESS FOR ADJUSTING THE SAID FILTER

Country Status (4)

Country Link
BE (1) BE869326A (en)
DE (1) DE2831107A1 (en)
FR (1) FR2399159A1 (en)
GB (1) GB2002193A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3231919A1 (en) * 1982-08-27 1984-03-01 Robert Bosch Gmbh, 7000 Stuttgart Active audio-frequency low-pass filter arrangement
FR2718857B1 (en) * 1994-04-15 1996-08-14 Giat Ind Sa Method and system for stabilizing a movable, controlled member carried by an insufficiently rigid chassis.
GB9509624D0 (en) * 1995-05-12 1995-07-05 Amstrad Plc Telecommunications apparatus
FR2778513B1 (en) * 1998-05-06 2000-07-13 Matra Nortel Communications ANALOG SIGNAL PROCESSING CIRCUIT
CN113311879B (en) * 2021-03-09 2023-05-23 北京七星华创流量计有限公司 Voltage signal output module and detection power supply

Also Published As

Publication number Publication date
BE869326A (en) 1979-01-29
DE2831107B2 (en) 1979-11-22
DE2831107A1 (en) 1979-02-01
GB2002193A (en) 1979-02-14

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Legal Events

Date Code Title Description
ST Notification of lapse