SE7903088L - LAYER PASS FILTER FOR TELEPHONE DAMAL - Google Patents

LAYER PASS FILTER FOR TELEPHONE DAMAL

Info

Publication number
SE7903088L
SE7903088L SE7903088A SE7903088A SE7903088L SE 7903088 L SE7903088 L SE 7903088L SE 7903088 A SE7903088 A SE 7903088A SE 7903088 A SE7903088 A SE 7903088A SE 7903088 L SE7903088 L SE 7903088L
Authority
SE
Sweden
Prior art keywords
section
telephone
damal
pass filter
layer pass
Prior art date
Application number
SE7903088A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE435121B (en
Inventor
G Bars
J Baudin
Original Assignee
Cit Alcatel
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 Cit Alcatel filed Critical Cit Alcatel
Publication of SE7903088L publication Critical patent/SE7903088L/en
Publication of SE435121B publication Critical patent/SE435121B/en

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

The invention relates to telephone band low-pass filters for use in demodulating PCM. Such filters are formed by two sections (1, 2) connected in cascade, each section including an operational amplifier (A1, A2). A first section is of the low-pass type whose loss at high frequencies is at least 6dB/octave; the second section is a second order asymmetrical notch network with a Cauer response characteristic: the second section may comprise, for example, a double tapped bridge and an operational amplifier. <IMAGE>
SE7903088A 1978-04-07 1979-04-06 PHONE PAD LAYER FILTER SE435121B (en)

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
SE7903088L true SE7903088L (en) 1979-10-08
SE435121B SE435121B (en) 1984-09-03

Family

ID=9206879

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7903088A SE435121B (en) 1978-04-07 1979-04-06 PHONE PAD LAYER FILTER

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)

Families Citing this family (5)

* 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
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
IT7967695A0 (en) 1979-04-03
FR2422291A1 (en) 1979-11-02
PL214706A1 (en) 1979-12-17
SE435121B (en) 1984-09-03
LU81123A1 (en) 1979-11-07
IT1118544B (en) 1986-03-03
BE874754A (en) 1979-09-12
FR2422291B1 (en) 1982-03-19
JPS54134952A (en) 1979-10-19
EG14776A (en) 1985-03-31
GB2019146A (en) 1979-10-24
FI72018B (en) 1986-11-28
DE2913135A1 (en) 1979-10-18
ZA791627B (en) 1980-04-30
FI791076A (en) 1979-10-08
AU4584779A (en) 1979-10-11
NL7902568A (en) 1979-10-09
FI72018C (en) 1987-03-09
MX144741A (en) 1981-11-18

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