FR2422291A1 - LOW PASS FILTER FOR TELEPHONE BAND - Google Patents

LOW PASS FILTER FOR TELEPHONE BAND

Info

Publication number
FR2422291A1
FR2422291A1 FR7810479A FR7810479A FR2422291A1 FR 2422291 A1 FR2422291 A1 FR 2422291A1 FR 7810479 A FR7810479 A FR 7810479A FR 7810479 A FR7810479 A FR 7810479A FR 2422291 A1 FR2422291 A1 FR 2422291A1
Authority
FR
France
Prior art keywords
low pass
pass filter
cell
telephone band
operational amplifier
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.)
Granted
Application number
FR7810479A
Other languages
French (fr)
Other versions
FR2422291B1 (en
Inventor
Jacques Baudin
Gerard Bars
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.)
Alcatel CIT SA
Original Assignee
Alcatel CIT SA
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 Alcatel CIT SA filed Critical Alcatel CIT SA
Priority to FR7810479A priority Critical patent/FR2422291A1/en
Priority to BE1/9306A priority patent/BE874754A/en
Priority to GB7909533A priority patent/GB2019146A/en
Priority to JP3680979A priority patent/JPS54134952A/en
Priority to EG79191A priority patent/EG14776A/en
Priority to DE19792913135 priority patent/DE2913135A1/en
Priority to FI791076A priority patent/FI72018C/en
Priority to NL7902568A priority patent/NL7902568A/en
Priority to IT67695/79A priority patent/IT1118544B/en
Priority to MX177213A priority patent/MX144741A/en
Priority to LU81123A priority patent/LU81123A1/en
Priority to AU45847/79A priority patent/AU4584779A/en
Priority to ZA791627A priority patent/ZA791627B/en
Priority to PL21470679A priority patent/PL214706A1/en
Priority to SE7903088A priority patent/SE435121B/en
Publication of FR2422291A1 publication Critical patent/FR2422291A1/en
Application granted granted Critical
Publication of FR2422291B1 publication Critical patent/FR2422291B1/fr
Granted 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
    • 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
    • H03H19/00—Networks using time-varying elements, e.g. N-path filters

Landscapes

  • Networks Using Active Elements (AREA)

Abstract

L'invention concerne les filtres passe-bas. Ce filtre est composé de deux cellules en série, chacune comportant un amplificateur opérationnel. Une première cellule est un passe-bas dont l'atténuation aux fréquences élevées est d'au moins 6dB/octave; la deuxième cellule est un réseau rejecteur dissymétrique du second ordre ayant une réponse de Cauer; la deuxième cellule peut comporter par exemple un double T et un amplificateur opérationnel. Application à la téléphonie.The invention relates to low pass filters. This filter is composed of two cells in series, each comprising an operational amplifier. A first cell is a low pass whose attenuation at high frequencies is at least 6dB / octave; the second cell is an asymmetric second order rejector network having a Cauer response; the second cell may for example include a double T and an operational amplifier. Application to telephony.

FR7810479A 1978-04-07 1978-04-07 LOW PASS FILTER FOR TELEPHONE BAND Granted FR2422291A1 (en)

Priority Applications (15)

Application Number Priority Date Filing Date Title
FR7810479A FR2422291A1 (en) 1978-04-07 1978-04-07 LOW PASS FILTER FOR TELEPHONE BAND
BE1/9306A BE874754A (en) 1978-04-07 1979-03-12 LOW PASS FILTER FOR TELEPHONE BAND
GB7909533A GB2019146A (en) 1978-04-07 1979-03-19 A Telephone Band Low-Pass Notch Filter
JP3680979A JPS54134952A (en) 1978-04-07 1979-03-28 Low pass filter for telephone band
EG79191A EG14776A (en) 1978-04-07 1979-03-28 Filtre passe-bas pour bande telephonique
FI791076A FI72018C (en) 1978-04-07 1979-04-02 LAOGPASSFILTER FOER TELEFONBAND.
NL7902568A NL7902568A (en) 1978-04-07 1979-04-02 LOW-PASS FILTER FOR THE TELEPHONY BAND.
DE19792913135 DE2913135A1 (en) 1978-04-07 1979-04-02 LOW-PASS FILTER FOR TELEPHONE SIGNALS
IT67695/79A IT1118544B (en) 1978-04-07 1979-04-03 LOW PASS FILTER FOR TELEPHONE BAND
MX177213A MX144741A (en) 1978-04-07 1979-04-05 LOW PASS FILTER FOR TELEPHONE BAND
LU81123A LU81123A1 (en) 1978-04-07 1979-04-05 LOW PASS FILTER FOR TELEPHONE BAND
AU45847/79A AU4584779A (en) 1978-04-07 1979-04-05 Telephone band low-pass filter
ZA791627A ZA791627B (en) 1978-04-07 1979-04-05 A telephone band low-pass filter
PL21470679A PL214706A1 (en) 1978-04-07 1979-04-05 LOW-CUT FILTER FOR TELEPHONE BAND
SE7903088A SE435121B (en) 1978-04-07 1979-04-06 PHONE PAD LAYER FILTER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7810479A FR2422291A1 (en) 1978-04-07 1978-04-07 LOW PASS FILTER FOR TELEPHONE BAND

Publications (2)

Publication Number Publication Date
FR2422291A1 true FR2422291A1 (en) 1979-11-02
FR2422291B1 FR2422291B1 (en) 1982-03-19

Family

ID=9206879

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7810479A Granted FR2422291A1 (en) 1978-04-07 1978-04-07 LOW PASS FILTER FOR TELEPHONE BAND

Country Status (15)

Country Link
JP (1) JPS54134952A (en)
AU (1) AU4584779A (en)
BE (1) BE874754A (en)
DE (1) DE2913135A1 (en)
EG (1) EG14776A (en)
FI (1) FI72018C (en)
FR (1) FR2422291A1 (en)
GB (1) GB2019146A (en)
IT (1) IT1118544B (en)
LU (1) LU81123A1 (en)
MX (1) MX144741A (en)
NL (1) NL7902568A (en)
PL (1) PL214706A1 (en)
SE (1) SE435121B (en)
ZA (1) ZA791627B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2677362C1 (en) * 2018-03-14 2019-01-16 федеральное государственное бюджетное образовательное учреждение высшего образования "Донской государственный технический университет" (ДГТУ) Active rc filter
RU2722752C1 (en) * 2019-12-11 2020-06-03 федеральное государственное бюджетное образовательное учреждение высшего образования "Донской государственный технический университет" (ДГТУ) Band-pass filter with independent adjustment of pole frequency, pole attenuation and transmission coefficient

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2307626B (en) * 1995-11-24 2000-06-07 Nokia Mobile Phones Ltd A signal receiver
DE10032530C2 (en) 2000-07-05 2002-10-24 Infineon Technologies Ag Amplifier circuit with offset compensation
US6552604B2 (en) * 2001-02-16 2003-04-22 The Boeing Company Digitally tuned analog notch filter circuit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NV2198/77 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2677362C1 (en) * 2018-03-14 2019-01-16 федеральное государственное бюджетное образовательное учреждение высшего образования "Донской государственный технический университет" (ДГТУ) Active rc filter
RU2722752C1 (en) * 2019-12-11 2020-06-03 федеральное государственное бюджетное образовательное учреждение высшего образования "Донской государственный технический университет" (ДГТУ) Band-pass filter with independent adjustment of pole frequency, pole attenuation and transmission coefficient

Also Published As

Publication number Publication date
SE7903088L (en) 1979-10-08
LU81123A1 (en) 1979-11-07
FI791076A (en) 1979-10-08
NL7902568A (en) 1979-10-09
ZA791627B (en) 1980-04-30
FR2422291B1 (en) 1982-03-19
DE2913135A1 (en) 1979-10-18
GB2019146A (en) 1979-10-24
AU4584779A (en) 1979-10-11
JPS54134952A (en) 1979-10-19
FI72018C (en) 1987-03-09
BE874754A (en) 1979-09-12
FI72018B (en) 1986-11-28
EG14776A (en) 1985-03-31
IT1118544B (en) 1986-03-03
PL214706A1 (en) 1979-12-17
SE435121B (en) 1984-09-03
MX144741A (en) 1981-11-18
IT7967695A0 (en) 1979-04-03

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Legal Events

Date Code Title Description
ST Notification of lapse