GB2313008B - Improvements in or relating to filters - Google Patents

Improvements in or relating to filters

Info

Publication number
GB2313008B
GB2313008B GB9609758A GB9609758A GB2313008B GB 2313008 B GB2313008 B GB 2313008B GB 9609758 A GB9609758 A GB 9609758A GB 9609758 A GB9609758 A GB 9609758A GB 2313008 B GB2313008 B GB 2313008B
Authority
GB
United Kingdom
Prior art keywords
filters
relating
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
GB9609758A
Other versions
GB9609758D0 (en
GB2313008A (en
Inventor
Dominic Thomas Parfrey Banham
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.)
Roke Manor Research Ltd
Original Assignee
Roke Manor Research 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 Roke Manor Research Ltd filed Critical Roke Manor Research Ltd
Priority to GB9609758A priority Critical patent/GB2313008B/en
Publication of GB9609758D0 publication Critical patent/GB9609758D0/en
Publication of GB2313008A publication Critical patent/GB2313008A/en
Application granted granted Critical
Publication of GB2313008B publication Critical patent/GB2313008B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/16—Tuning without displacement of reactive element, e.g. by varying permeability
    • H03J3/18—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance
    • H03J3/185—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance with varactors, i.e. voltage variable reactive diodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/06—Arrangements for obtaining constant bandwidth or gain throughout tuning range or ranges
    • H03J3/08—Arrangements for obtaining constant bandwidth or gain throughout tuning range or ranges by varying a second parameter simultaneously with the tuning, e.g. coupling bandpass filter
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/20—Continuous tuning of single resonant circuit by varying inductance only or capacitance only
GB9609758A 1996-05-10 1996-05-10 Improvements in or relating to filters Expired - Fee Related GB2313008B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9609758A GB2313008B (en) 1996-05-10 1996-05-10 Improvements in or relating to filters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9609758A GB2313008B (en) 1996-05-10 1996-05-10 Improvements in or relating to filters

Publications (3)

Publication Number Publication Date
GB9609758D0 GB9609758D0 (en) 1996-07-17
GB2313008A GB2313008A (en) 1997-11-12
GB2313008B true GB2313008B (en) 2000-03-15

Family

ID=10793469

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9609758A Expired - Fee Related GB2313008B (en) 1996-05-10 1996-05-10 Improvements in or relating to filters

Country Status (1)

Country Link
GB (1) GB2313008B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2906946B1 (en) 2006-10-06 2008-12-19 Thales Sa FAST TRACTABLE FILTER
CN109637788A (en) * 2018-12-29 2019-04-16 厦门英诺迅科技有限公司 A kind of voltage-controlled variable inductance
CN118310561B (en) * 2024-06-07 2024-08-13 成都希盟泰克科技发展有限公司 Passive wireless sensor based on two reverse-connection varactors

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB507586A (en) * 1937-12-16 1939-06-16 Marconi Wireless Telegraph Co Improvements in or relating to tunable frequency selective circuits
GB518969A (en) * 1938-09-05 1940-03-13 Marconi Wireless Telegraph Co Improvements in electrical tuned circuits
GB988295A (en) * 1963-05-09 1965-04-07 Emi Ltd Voltage variable bandpass filter
GB2276786A (en) * 1993-03-22 1994-10-05 Motorola Gmbh A voltage controlled filter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB507586A (en) * 1937-12-16 1939-06-16 Marconi Wireless Telegraph Co Improvements in or relating to tunable frequency selective circuits
GB518969A (en) * 1938-09-05 1940-03-13 Marconi Wireless Telegraph Co Improvements in electrical tuned circuits
GB988295A (en) * 1963-05-09 1965-04-07 Emi Ltd Voltage variable bandpass filter
GB2276786A (en) * 1993-03-22 1994-10-05 Motorola Gmbh A voltage controlled filter

Also Published As

Publication number Publication date
GB9609758D0 (en) 1996-07-17
GB2313008A (en) 1997-11-12

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Legal Events

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

Effective date: 20040510