FR2422291A1 - Filtre passe-bas pour bande telephonique - Google Patents

Filtre passe-bas pour bande telephonique

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
English (en)
French (fr)
Other versions
FR2422291B1 (it
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/fr
Priority to BE1/9306A priority patent/BE874754A/xx
Priority to GB7909533A priority patent/GB2019146A/en
Priority to JP3680979A priority patent/JPS54134952A/ja
Priority to EG79191A priority patent/EG14776A/xx
Priority to DE19792913135 priority patent/DE2913135A1/de
Priority to FI791076A priority patent/FI72018C/fi
Priority to NL7902568A priority patent/NL7902568A/xx
Priority to IT67695/79A priority patent/IT1118544B/it
Priority to MX177213A priority patent/MX144741A/es
Priority to AU45847/79A priority patent/AU4584779A/en
Priority to PL21470679A priority patent/PL214706A1/xx
Priority to ZA791627A priority patent/ZA791627B/xx
Priority to LU81123A priority patent/LU81123A1/xx
Priority to SE7903088A priority patent/SE435121B/sv
Publication of FR2422291A1 publication Critical patent/FR2422291A1/fr
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)
FR7810479A 1978-04-07 1978-04-07 Filtre passe-bas pour bande telephonique Granted FR2422291A1 (fr)

Priority Applications (15)

Application Number Priority Date Filing Date Title
FR7810479A FR2422291A1 (fr) 1978-04-07 1978-04-07 Filtre passe-bas pour bande telephonique
BE1/9306A BE874754A (fr) 1978-04-07 1979-03-12 Filtre passe-bas pour bande telephonique
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 (fi) 1978-04-07 1979-04-02 Laogpassfilter foer telefonband.
NL7902568A NL7902568A (nl) 1978-04-07 1979-04-02 Laagdoorlaatfilter voor de telefonieband.
DE19792913135 DE2913135A1 (de) 1978-04-07 1979-04-02 Tiefpassfilter fuer fernsprechsignale
IT67695/79A IT1118544B (it) 1978-04-07 1979-04-03 Filtro passabasso per banda telefonica
MX177213A MX144741A (es) 1978-04-07 1979-04-05 Filtro de pase-bajo para banda telefonica
AU45847/79A AU4584779A (en) 1978-04-07 1979-04-05 Telephone band low-pass filter
PL21470679A PL214706A1 (pl) 1978-04-07 1979-04-05 Filtr dolno-przepustowy dla pasma telefonicznego
ZA791627A ZA791627B (en) 1978-04-07 1979-04-05 A telephone band low-pass filter
LU81123A LU81123A1 (fr) 1978-04-07 1979-04-05 Filtre passe-bas pour bande telephonique
SE7903088A SE435121B (sv) 1978-04-07 1979-04-06 Lagpassfilter for telefoniendamal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7810479A FR2422291A1 (fr) 1978-04-07 1978-04-07 Filtre passe-bas pour bande telephonique

Publications (2)

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

Family

ID=9206879

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7810479A Granted FR2422291A1 (fr) 1978-04-07 1978-04-07 Filtre passe-bas pour bande telephonique

Country Status (15)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2677362C1 (ru) * 2018-03-14 2019-01-16 федеральное государственное бюджетное образовательное учреждение высшего образования "Донской государственный технический университет" (ДГТУ) Активный rc-фильтр
RU2722752C1 (ru) * 2019-12-11 2020-06-03 федеральное государственное бюджетное образовательное учреждение высшего образования "Донской государственный технический университет" (ДГТУ) Полосовой фильтр с независимой подстройкой частоты полюса, затухания полюса и коэффициента передачи

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 (de) * 2000-07-05 2002-10-24 Infineon Technologies Ag Verstärkerschaltung mit Offsetkompensation
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 (ru) * 2018-03-14 2019-01-16 федеральное государственное бюджетное образовательное учреждение высшего образования "Донской государственный технический университет" (ДГТУ) Активный rc-фильтр
RU2722752C1 (ru) * 2019-12-11 2020-06-03 федеральное государственное бюджетное образовательное учреждение высшего образования "Донской государственный технический университет" (ДГТУ) Полосовой фильтр с независимой подстройкой частоты полюса, затухания полюса и коэффициента передачи

Also Published As

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

Similar Documents

Publication Publication Date Title
EP0038991B1 (de) Aus CTD-Elementen bestehende, mit einer vorgebbaren Abtast- und Taktfrequenz f tief T betriebene elektrische Filterschaltung
FR2422291A1 (fr) Filtre passe-bas pour bande telephonique
JP2992294B2 (ja) ノイズ除去方法
ATE31854T1 (de) Digitale teilbandfilter.
US3622714A (en) Telephonic transmission using complementary comb filters
Pollack The loudness of bands of noise
US4459542A (en) Spectrum analyzer having common two-channel filters, especially for voice recognition
US4149039A (en) Frequency band compression of FDM using time expansion
Bogert The Vobanc—A Two‐to‐One Speech Band‐Width Reduction System
GB1495636A (en) Charge transfer devices
US6608898B1 (en) Band pass and notch filters for echo reduction with less phase distortion
FR2427743A1 (fr) Dispositif de surveillance d'un transmultiplexeur
WO1979000046A1 (en) A dereverberation system
US3681701A (en) Filtering method and a circuit arrangement for carrying out the filtering method
JPS57142020A (en) Sampling frequency converter
Pollack On the effect of frequency and amplitude distortion on the intelligibility of speech in noise
Martin Uniform Speech‐Peak Clipping in a Uniform Signal‐to‐Noise Spectrum Ratio
US3941948A (en) Four-wire interface regulator for long distance trunk circuits
JPH0494204A (ja) 利得制御回路及び環境雑音収集装置
JPH01286622A (ja) 信号処理方法及び装置
Guidarelli Multichannel infinite clipping as a form of sampling of speech signals
JPS59122135A (ja) 音声圧縮伝送方式
SU110566A1 (ru) Способ определени натуральности звучани и разборчивости речи, передаваемой по телефонному каналу
FR2398413A1 (fr) Filtre electrique de frequence a cristaux piezoelectriques
SU660198A1 (ru) Полосовой цепочечный фильтр с многопетлевой частотно-независимой обратной св зью

Legal Events

Date Code Title Description
ST Notification of lapse