GB8707789D0 - Programmable electronic filter - Google Patents

Programmable electronic filter

Info

Publication number
GB8707789D0
GB8707789D0 GB878707789A GB8707789A GB8707789D0 GB 8707789 D0 GB8707789 D0 GB 8707789D0 GB 878707789 A GB878707789 A GB 878707789A GB 8707789 A GB8707789 A GB 8707789A GB 8707789 D0 GB8707789 D0 GB 8707789D0
Authority
GB
United Kingdom
Prior art keywords
programmable electronic
electronic filter
filter
programmable
electronic
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Withdrawn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
GB878707789A
Other versions
GB2189100A (en
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.)
Plessey Co Ltd
Original Assignee
Plessey Co Ltd
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 Plessey Co Ltd filed Critical Plessey Co Ltd
Publication of GB8707789D0 publication Critical patent/GB8707789D0/en
Publication of GB2189100A publication Critical patent/GB2189100A/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Withdrawn legal-status Critical Current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
    • H03H11/1291—Current or voltage controlled filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/24—Frequency-independent attenuators
GB08707789A 1986-04-02 1987-04-01 A programmable electronic filter Withdrawn GB2189100A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB868608087A GB8608087D0 (en) 1986-04-02 1986-04-02 Variable resistors

Publications (2)

Publication Number Publication Date
GB8707789D0 true GB8707789D0 (en) 1987-05-07
GB2189100A GB2189100A (en) 1987-10-14

Family

ID=10595576

Family Applications (2)

Application Number Title Priority Date Filing Date
GB868608087A Pending GB8608087D0 (en) 1986-04-02 1986-04-02 Variable resistors
GB08707789A Withdrawn GB2189100A (en) 1986-04-02 1987-04-01 A programmable electronic filter

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB868608087A Pending GB8608087D0 (en) 1986-04-02 1986-04-02 Variable resistors

Country Status (2)

Country Link
GB (2) GB8608087D0 (en)
WO (1) WO1987006074A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2596593A1 (en) * 1986-03-25 1987-10-02 Thomson Csf METHOD OF SUPPRESSING PARASITE ECHOS IN VOLUME WAVE ELECTROACOUSTIC DELAY LINES, AND DELAY LINE USING THE SAME
US5459791A (en) * 1992-06-02 1995-10-17 Soundtracs Plc Audio frequency filter
GB2267621B (en) * 1992-06-02 1996-01-03 Soundtracs Plc Audio frequency filter
GB2298982B (en) * 1995-03-15 1998-11-18 Plessey Semiconductors Ltd Controllable filter arrangement
US20100127796A1 (en) * 2006-03-22 2010-05-27 C10 Communications Pty Ltd Electronic filter and an electronic circuit for use in a switching application

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1160117A (en) * 1965-11-15 1969-07-30 Plessey Co Ltd Improvements in or relating to Variable Attenuators
JPS52153651A (en) * 1976-06-17 1977-12-20 Sony Corp Gain changing circuit
JPS5729368Y2 (en) * 1977-02-10 1982-06-28
JPS5545224A (en) * 1978-09-26 1980-03-29 Sony Corp Filter circuit
JPS58182332A (en) * 1982-04-19 1983-10-25 Nec Corp Battery saving device of selecting call receiver
US4517508A (en) * 1982-05-08 1985-05-14 Toko, Inc. Variable impedance circuit
CA1201775A (en) * 1982-07-19 1986-03-11 Yukio Akazawa Monolithic integrated circuit device including ac negative feedback type high frequency amplifier circuit
US4514704A (en) * 1983-08-26 1985-04-30 Curtis Douglas R Variable filter circuit

Also Published As

Publication number Publication date
GB8608087D0 (en) 1986-05-08
WO1987006074A1 (en) 1987-10-08
GB2189100A (en) 1987-10-14

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)