GB2170969B - Electrical filter - Google Patents

Electrical filter

Info

Publication number
GB2170969B
GB2170969B GB08529439A GB8529439A GB2170969B GB 2170969 B GB2170969 B GB 2170969B GB 08529439 A GB08529439 A GB 08529439A GB 8529439 A GB8529439 A GB 8529439A GB 2170969 B GB2170969 B GB 2170969B
Authority
GB
United Kingdom
Prior art keywords
electrical filter
filter
electrical
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.)
Expired
Application number
GB08529439A
Other versions
GB8529439D0 (en
GB2170969A (en
Inventor
John Barry Hughes
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB8529439D0 publication Critical patent/GB8529439D0/en
Priority to EP19860200175 priority Critical patent/EP0191529B1/en
Priority to US06/828,004 priority patent/US4791379A/en
Priority to DE8686200175T priority patent/DE3682598D1/en
Priority to JP61028054A priority patent/JPH0683015B2/en
Publication of GB2170969A publication Critical patent/GB2170969A/en
Application granted granted Critical
Publication of GB2170969B publication Critical patent/GB2170969B/en
Expired 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
    • H03H2210/00—Indexing scheme relating to details of tunable filters
    • H03H2210/02—Variable filter component
    • H03H2210/021—Amplifier, e.g. transconductance amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H2210/00—Indexing scheme relating to details of tunable filters
    • H03H2210/04—Filter calibration method
    • H03H2210/043—Filter calibration method by measuring time constant
GB08529439A 1985-02-13 1985-11-29 Electrical filter Expired GB2170969B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP19860200175 EP0191529B1 (en) 1985-02-13 1986-02-10 Electrical filter
US06/828,004 US4791379A (en) 1985-02-13 1986-02-10 Electrical filter with adjustable RC product
DE8686200175T DE3682598D1 (en) 1985-02-13 1986-02-10 ELECTRIC FILTER.
JP61028054A JPH0683015B2 (en) 1985-02-13 1986-02-13 Integrated electric filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB858503676A GB8503676D0 (en) 1985-02-13 1985-02-13 Electrical filter

Publications (3)

Publication Number Publication Date
GB8529439D0 GB8529439D0 (en) 1986-01-08
GB2170969A GB2170969A (en) 1986-08-13
GB2170969B true GB2170969B (en) 1988-11-09

Family

ID=10574412

Family Applications (2)

Application Number Title Priority Date Filing Date
GB858503676A Pending GB8503676D0 (en) 1985-02-13 1985-02-13 Electrical filter
GB08529439A Expired GB2170969B (en) 1985-02-13 1985-11-29 Electrical filter

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB858503676A Pending GB8503676D0 (en) 1985-02-13 1985-02-13 Electrical filter

Country Status (1)

Country Link
GB (2) GB8503676D0 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8526928D0 (en) * 1985-11-01 1985-12-04 Lucas Ind Plc Trimming capsule
US6838946B2 (en) 2002-04-10 2005-01-04 Qualcomm Incorporated Circuit and method for adjusting circuit tolerances
DE10308527B4 (en) * 2003-02-27 2012-05-31 Lantiq Deutschland Gmbh Tuning circuit and method for tuning a filter stage
EP1455449A1 (en) * 2003-03-07 2004-09-08 Texas Instruments Incorporated Calibrated fully differential RC filter
US6903602B2 (en) 2003-09-08 2005-06-07 Texas Instruments Incorporated Calibrated fully differential RC filter
WO2015044703A1 (en) * 2013-09-27 2015-04-02 Freescale Semiconductor, Inc. Integrated calibration circuit and a method for calibration of a filter circuit

Also Published As

Publication number Publication date
GB8529439D0 (en) 1986-01-08
GB2170969A (en) 1986-08-13
GB8503676D0 (en) 1985-03-13

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Legal Events

Date Code Title Description
7732 Case decided by the comptroller ** patent revoked (sect. 73(2)/1977)