GB2308761B - A high frequency differential filter with cmos control - Google Patents

A high frequency differential filter with cmos control

Info

Publication number
GB2308761B
GB2308761B GB9620487A GB9620487A GB2308761B GB 2308761 B GB2308761 B GB 2308761B GB 9620487 A GB9620487 A GB 9620487A GB 9620487 A GB9620487 A GB 9620487A GB 2308761 B GB2308761 B GB 2308761B
Authority
GB
United Kingdom
Prior art keywords
high frequency
differential filter
frequency differential
cmos control
cmos
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
GB9620487A
Other versions
GB9620487D0 (en
GB2308761A (en
Inventor
Michael Altmann
Bernard Guay
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom 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
Priority claimed from US08/643,140 external-priority patent/US5708391A/en
Application filed by Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of GB9620487D0 publication Critical patent/GB9620487D0/en
Publication of GB2308761A publication Critical patent/GB2308761A/en
Application granted granted Critical
Publication of GB2308761B publication Critical patent/GB2308761B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/153—Arrangements in which a pulse is delivered at the instant when a predetermined characteristic of an input signal is present or at a fixed time interval after this instant
    • H03K5/1532—Peak detectors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45504—Indexing scheme relating to differential amplifiers the CSC comprising more than one switch
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/72—Indexing scheme relating to gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
    • H03F2203/7203—Indexing scheme relating to gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal the gated amplifier being switched on or off by a switch in the bias circuit of the amplifier controlling a bias current in the amplifier

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Networks Using Active Elements (AREA)
GB9620487A 1995-10-02 1996-10-02 A high frequency differential filter with cmos control Expired - Fee Related GB2308761B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US467895P 1995-10-02 1995-10-02
US08/643,140 US5708391A (en) 1996-05-02 1996-05-02 High frequency differential filter with CMOS control

Publications (3)

Publication Number Publication Date
GB9620487D0 GB9620487D0 (en) 1996-11-20
GB2308761A GB2308761A (en) 1997-07-02
GB2308761B true GB2308761B (en) 1999-02-10

Family

ID=26673327

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9620487A Expired - Fee Related GB2308761B (en) 1995-10-02 1996-10-02 A high frequency differential filter with cmos control

Country Status (1)

Country Link
GB (1) GB2308761B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4009400A (en) * 1975-11-28 1977-02-22 Lockheed Missiles & Space Company, Inc. Digitally controlled variable conductance
GB2243508A (en) * 1990-03-28 1991-10-30 Silicon Systems Inc High frequency filters
US5157559A (en) * 1989-04-26 1992-10-20 Vtc Inc. Adjustable bandwidth differentiating amplifier for a magnetic disk drive
US5418483A (en) * 1992-03-13 1995-05-23 Sharp Kabushiki Kaisha Cut-off frequency setting circuit of a filter circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4009400A (en) * 1975-11-28 1977-02-22 Lockheed Missiles & Space Company, Inc. Digitally controlled variable conductance
US5157559A (en) * 1989-04-26 1992-10-20 Vtc Inc. Adjustable bandwidth differentiating amplifier for a magnetic disk drive
GB2243508A (en) * 1990-03-28 1991-10-30 Silicon Systems Inc High frequency filters
US5418483A (en) * 1992-03-13 1995-05-23 Sharp Kabushiki Kaisha Cut-off frequency setting circuit of a filter circuit

Also Published As

Publication number Publication date
GB9620487D0 (en) 1996-11-20
GB2308761A (en) 1997-07-02

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20041002