DK167722B1 - Kredsloeb til baandomskiftning af en spaendingsstyret oscillator - Google Patents

Kredsloeb til baandomskiftning af en spaendingsstyret oscillator Download PDF

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Publication number
DK167722B1
DK167722B1 DK180786A DK180786A DK167722B1 DK 167722 B1 DK167722 B1 DK 167722B1 DK 180786 A DK180786 A DK 180786A DK 180786 A DK180786 A DK 180786A DK 167722 B1 DK167722 B1 DK 167722B1
Authority
DK
Denmark
Prior art keywords
capacitor
circuit
switching
sensitivity
control line
Prior art date
Application number
DK180786A
Other languages
Danish (da)
English (en)
Other versions
DK180786A (da
DK180786D0 (da
Inventor
Stephen Robert Wynn
Original Assignee
Ericsson Ge Mobile Communicat
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 Ericsson Ge Mobile Communicat filed Critical Ericsson Ge Mobile Communicat
Publication of DK180786D0 publication Critical patent/DK180786D0/da
Publication of DK180786A publication Critical patent/DK180786A/da
Application granted granted Critical
Publication of DK167722B1 publication Critical patent/DK167722B1/da

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
    • H03J5/246—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection using electronic means

Landscapes

  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Superheterodyne Receivers (AREA)
  • Transmitters (AREA)
DK180786A 1985-04-19 1986-04-18 Kredsloeb til baandomskiftning af en spaendingsstyret oscillator DK167722B1 (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/724,977 US4602222A (en) 1985-04-19 1985-04-19 Circuit for bandswitching a voltage controlled oscillator
US72497785 1985-04-19

Publications (3)

Publication Number Publication Date
DK180786D0 DK180786D0 (da) 1986-04-18
DK180786A DK180786A (da) 1986-10-20
DK167722B1 true DK167722B1 (da) 1993-12-06

Family

ID=24912633

Family Applications (1)

Application Number Title Priority Date Filing Date
DK180786A DK167722B1 (da) 1985-04-19 1986-04-18 Kredsloeb til baandomskiftning af en spaendingsstyret oscillator

Country Status (5)

Country Link
US (1) US4602222A (ja)
EP (1) EP0209640B1 (ja)
JP (1) JPH0763152B2 (ja)
DE (1) DE3681842D1 (ja)
DK (1) DK167722B1 (ja)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT386499B (de) * 1986-07-29 1988-08-25 Philips Nv Rundfunkempfaenger
US5418503A (en) * 1993-03-08 1995-05-23 Ericsson Ge Mobile Communications Inc. Compensation of transient frequency drift in oscillator circuits
KR0153379B1 (ko) * 1995-09-26 1998-11-16 김광호 디지탈 무선통신시스템의 업/다운컨버터용 전압제어발진기
US6013958A (en) * 1998-07-23 2000-01-11 Lucent Technologies Inc. Integrated circuit with variable capacitor
KR20020066473A (ko) * 2001-02-12 2002-08-19 삼성전자 주식회사 전압제어발진기의 발진 주파수대역 전환을 위한 전압제어가변동조회로
US6724265B2 (en) 2002-06-14 2004-04-20 Rf Micro Devices, Inc. Compensation for oscillator tuning gain variations in frequency synthesizers
US20040246039A1 (en) * 2003-06-03 2004-12-09 Chi-Ming Hsiao Switched capacitor circuit capable of minimizing clock feedthrough effect in a voltage controlled oscillator circuit
US7015742B2 (en) * 2003-06-20 2006-03-21 Media Tek Inc. Switched capacitor circuit capable of eliminating clock feedthrough by complementary control signals for digital tuning VCO
FR2871628B1 (fr) 2004-06-10 2006-08-11 Commissariat Energie Atomique Oscillateur controle en tension
US7479839B1 (en) * 2008-03-31 2009-01-20 International Business Machines Corporation Varactor bank switching based on negative control voltage generation
US7498894B1 (en) 2008-09-04 2009-03-03 International Business Machines Corporation Varactor system having real or apparent low capacitance density

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1051015A (ja) *
US2137318A (en) * 1931-05-28 1938-11-22 Hazeltine Corp Multiband tunable system
GB933934A (en) * 1960-12-08 1963-08-14 Marconi Wireless Telegraph Co Improvements in or relating to frequency varying circuit arrangements
GB1216308A (en) * 1967-06-02 1970-12-16 Plessey Co Ltd Improvements in or relating to tuned circuit arrangements
JPS4934262A (ja) * 1972-07-28 1974-03-29
DE2257574B1 (ja) * 1972-11-24 1974-05-22 Philips Patentverwaltung Gmbh, 2000 Hamburg
US3825858A (en) * 1973-02-23 1974-07-23 Hitachi Ltd Local oscillator for use in a vhf tuner for a television receiver
DE2412689C3 (de) * 1974-03-16 1978-04-27 Philips Patentverwaltung Gmbh, 2000 Hamburg Schaltungsanordnung zur Abstimmung und Bereichs- bzw. Bandumschaltung eines HF-Schwingungskreises
US4247953A (en) * 1977-07-01 1981-01-27 Hitachi, Ltd. Tunable high-frequency input circuit
JPS5724107A (en) * 1980-07-19 1982-02-08 Matsushita Electric Ind Co Ltd Oscillation circuit
US4363135A (en) * 1980-10-27 1982-12-07 Zenith Radio Corporation Four band VHF varactor tuner
US4339827A (en) * 1980-11-25 1982-07-13 Rca Corporation Automatic tuning circuit arrangement with switched impedances
JPS58212211A (ja) * 1982-06-04 1983-12-09 Citizen Watch Co Ltd 電子チユ−ナ

Also Published As

Publication number Publication date
US4602222A (en) 1986-07-22
JPS61244133A (ja) 1986-10-30
DE3681842D1 (de) 1991-11-14
DK180786A (da) 1986-10-20
DK180786D0 (da) 1986-04-18
JPH0763152B2 (ja) 1995-07-05
EP0209640A3 (en) 1988-03-02
EP0209640A2 (en) 1987-01-28
EP0209640B1 (en) 1991-10-09

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Legal Events

Date Code Title Description
B1 Patent granted (law 1993)
PBP Patent lapsed