JPH0516696B2 - - Google Patents

Info

Publication number
JPH0516696B2
JPH0516696B2 JP59070828A JP7082884A JPH0516696B2 JP H0516696 B2 JPH0516696 B2 JP H0516696B2 JP 59070828 A JP59070828 A JP 59070828A JP 7082884 A JP7082884 A JP 7082884A JP H0516696 B2 JPH0516696 B2 JP H0516696B2
Authority
JP
Japan
Prior art keywords
filter
filter circuit
circuit
level
comparison
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 - Fee Related
Application number
JP59070828A
Other languages
English (en)
Japanese (ja)
Other versions
JPS60214617A (ja
Inventor
Yoshinori Okada
Isao Fukushima
Kuniaki Miura
Kenji Kano
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP59070828A priority Critical patent/JPS60214617A/ja
Priority to CA000477618A priority patent/CA1223647A/en
Priority to DE8585103719T priority patent/DE3582513D1/de
Priority to EP85103719A priority patent/EP0158231B1/en
Priority to KR1019850002156A priority patent/KR900001717B1/ko
Priority to BR8501655A priority patent/BR8501655A/pt
Priority to US06/721,867 priority patent/US4667120A/en
Publication of JPS60214617A publication Critical patent/JPS60214617A/ja
Publication of JPH0516696B2 publication Critical patent/JPH0516696B2/ja
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
    • 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
    • H03H11/04—Frequency selective two-port networks
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H03H11/1213—Frequency selective two-port networks using amplifiers with feedback using transistor amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0153—Electrical filters; Controlling thereof

Landscapes

  • Networks Using Active Elements (AREA)
  • Filters And Equalizers (AREA)
JP59070828A 1984-04-11 1984-04-11 フイルタ集積回路 Granted JPS60214617A (ja)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP59070828A JPS60214617A (ja) 1984-04-11 1984-04-11 フイルタ集積回路
CA000477618A CA1223647A (en) 1984-04-11 1985-03-27 Filter integrated circuit
DE8585103719T DE3582513D1 (de) 1984-04-11 1985-03-28 Integrierter filter.
EP85103719A EP0158231B1 (en) 1984-04-11 1985-03-28 Filter integrated circuit
KR1019850002156A KR900001717B1 (ko) 1984-04-11 1985-03-30 필터 집적회로
BR8501655A BR8501655A (pt) 1984-04-11 1985-04-09 Circuito filtro integrado
US06/721,867 US4667120A (en) 1984-04-11 1985-04-10 Integrated filter circuit with variable frequency characteristics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59070828A JPS60214617A (ja) 1984-04-11 1984-04-11 フイルタ集積回路

Publications (2)

Publication Number Publication Date
JPS60214617A JPS60214617A (ja) 1985-10-26
JPH0516696B2 true JPH0516696B2 (OSRAM) 1993-03-05

Family

ID=13442824

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59070828A Granted JPS60214617A (ja) 1984-04-11 1984-04-11 フイルタ集積回路

Country Status (7)

Country Link
US (1) US4667120A (OSRAM)
EP (1) EP0158231B1 (OSRAM)
JP (1) JPS60214617A (OSRAM)
KR (1) KR900001717B1 (OSRAM)
BR (1) BR8501655A (OSRAM)
CA (1) CA1223647A (OSRAM)
DE (1) DE3582513D1 (OSRAM)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61281613A (ja) * 1985-05-20 1986-12-12 Sanyo Electric Co Ltd アクテイブフイルタの自動調整装置
GB2190255B (en) * 1986-04-30 1989-11-29 Philips Electronic Associated Electrical filter
JPH0787332B2 (ja) * 1986-07-18 1995-09-20 株式会社東芝 フイルタ回路の時定数自動調整回路
JP2522275B2 (ja) * 1986-12-27 1996-08-07 ソニー株式会社 フィルタ調整装置
JPH07120923B2 (ja) * 1986-12-27 1995-12-20 ソニー株式会社 フイルタ調整装置
JP2522274B2 (ja) * 1986-12-27 1996-08-07 ソニー株式会社 フィルタ調整装置
JP2522276B2 (ja) * 1986-12-27 1996-08-07 ソニー株式会社 フィルタ調整装置
JPH01183908A (ja) * 1988-01-18 1989-07-21 Nec Ic Microcomput Syst Ltd フィルタ回路
US5023491A (en) * 1988-01-18 1991-06-11 Nec Corporation Filter circuit arrangements with automatic adjustment of cut-off frequencies
JPH01183907A (ja) * 1988-01-18 1989-07-21 Nec Ic Microcomput Syst Ltd フィルタ回路
JPH0693594B2 (ja) * 1989-02-16 1994-11-16 株式会社東芝 アナログフィルタの自動調整回路
US5220220A (en) * 1989-09-20 1993-06-15 Gennum Corporation Noise suppression system
US5392456A (en) * 1989-10-06 1995-02-21 Hitachi, Ltd. Method of controlling filter time constant and filter circuit having the time constant control function based on the method
JPH03175714A (ja) * 1989-12-04 1991-07-30 Nec Corp フィルタ回路
JP2811928B2 (ja) * 1990-07-17 1998-10-15 日本電気株式会社 自動調整フィルタ
DE4025428C2 (de) * 1990-08-10 1994-03-03 Siemens Ag Schaltungsanordnung zur Erzeugung von Steuerspannungen
JP2962800B2 (ja) * 1990-09-29 1999-10-12 三洋電機株式会社 可変バンドパスフィルタの制御回路
US5233245A (en) * 1991-04-10 1993-08-03 General Electric Company Rate controlled noise filter
US7032189B2 (en) * 2002-10-31 2006-04-18 Northrop Grumman Corporation Configurable amplifier array incorporating programmable EHF transmission lines

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3562675A (en) * 1969-05-16 1971-02-09 Sperry Rand Corp Automatic tuned interference signal rejection filter including drift compensation means
JPS574492Y2 (OSRAM) * 1972-05-13 1982-01-27
US3761741A (en) * 1972-06-21 1973-09-25 Signetics Corp Electrically variable impedance utilizing the base emitter junctions of transistors
JPS579530B2 (OSRAM) * 1974-07-08 1982-02-22
CA1033478A (en) * 1974-07-18 1978-06-20 Sanyo Electric Co. Ltd. Automatic tuning apparatus
NL7415210A (en) * 1974-11-21 1976-05-25 Takeda Riken Ind Co Ltd Filter with automatically controlled variable cut off frequency - has output level maintained constant via amplifier with resistive feedback and FET.
US4316108A (en) * 1979-09-25 1982-02-16 Rogers Jr Walter M Tracking filter for FM threshold extension
US4509019A (en) * 1983-01-27 1985-04-02 At&T Bell Laboratories Tunable active filter

Also Published As

Publication number Publication date
EP0158231A2 (en) 1985-10-16
US4667120A (en) 1987-05-19
JPS60214617A (ja) 1985-10-26
CA1223647A (en) 1987-06-30
DE3582513D1 (de) 1991-05-23
KR900001717B1 (ko) 1990-03-19
EP0158231A3 (en) 1988-01-27
KR850008245A (ko) 1985-12-13
BR8501655A (pt) 1985-12-10
EP0158231B1 (en) 1991-04-17

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees