GB1240133A - Improvements in or relating to filters - Google Patents

Improvements in or relating to filters

Info

Publication number
GB1240133A
GB1240133A GB5624468A GB5624468A GB1240133A GB 1240133 A GB1240133 A GB 1240133A GB 5624468 A GB5624468 A GB 5624468A GB 5624468 A GB5624468 A GB 5624468A GB 1240133 A GB1240133 A GB 1240133A
Authority
GB
United Kingdom
Prior art keywords
network
pass
nov
commutated
switches
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
GB5624468A
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.)
Sentralinstitutt for Industriell Forskning
Original Assignee
Sentralinstitutt for Industriell Forskning
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 Sentralinstitutt for Industriell Forskning filed Critical Sentralinstitutt for Industriell Forskning
Publication of GB1240133A publication Critical patent/GB1240133A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03H19/002—N-path filters

Landscapes

  • Networks Using Active Elements (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1,240,133. Active filters. SENTRALINSTITUTT FOR INDITSTRIELLFORSKNTNG. 27 Nov., 1968 [30 Nov., 1967], No. 56244/68. Heading H3U. A commutated type filter comprises a network of resistors and capacitors, each capacitor having a sampling switch in series with it. The switches may be F.E.T.'s or mechanical switches and the commutating rate may be varied sweep the cut-off. The filter may be of the type comprising an amplifier with an R.C. network in the forward-path, and another in a feedback path. Various frequency responses are described, namely: low-pass, Figs. 1b, 2a, 2b, 3 (not shown); high-pass, Fig. 4 (not shown). Band pass or band stop responses may also be obtained. An alternative form, Fig. 5 (not shown), describes a commutated passive twin-T network.
GB5624468A 1967-11-30 1968-11-27 Improvements in or relating to filters Expired GB1240133A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO17078067A NO119098B (en) 1967-11-30 1967-11-30

Publications (1)

Publication Number Publication Date
GB1240133A true GB1240133A (en) 1971-07-21

Family

ID=19910334

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5624468A Expired GB1240133A (en) 1967-11-30 1968-11-27 Improvements in or relating to filters

Country Status (4)

Country Link
DE (1) DE1811503A1 (en)
DK (1) DK130030B (en)
GB (1) GB1240133A (en)
NO (1) NO119098B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3118198A1 (en) * 1981-05-08 1982-11-25 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Switch/capacitor filter
US4510585A (en) * 1980-10-22 1985-04-09 Geosource Inc. Electronic filter

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58125909A (en) * 1982-01-21 1983-07-27 Nec Corp Switched capacitor filter
DE3325325C2 (en) * 1983-07-13 1985-05-09 Siemens AG, 1000 Berlin und 8000 München Filter circuit consisting of switches and capacitors

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4510585A (en) * 1980-10-22 1985-04-09 Geosource Inc. Electronic filter
DE3118198A1 (en) * 1981-05-08 1982-11-25 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Switch/capacitor filter

Also Published As

Publication number Publication date
DE1811503A1 (en) 1969-07-10
DK130030C (en) 1975-05-20
DK130030B (en) 1974-12-09
NO119098B (en) 1970-03-23

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