IL80769A - Variable capacitance circuit and its use in tuned resonant circuit - Google Patents

Variable capacitance circuit and its use in tuned resonant circuit

Info

Publication number
IL80769A
IL80769A IL80769A IL8076986A IL80769A IL 80769 A IL80769 A IL 80769A IL 80769 A IL80769 A IL 80769A IL 8076986 A IL8076986 A IL 8076986A IL 80769 A IL80769 A IL 80769A
Authority
IL
Israel
Prior art keywords
circuit
variable capacitance
tuned resonant
resonant circuit
capacitance circuit
Prior art date
Application number
IL80769A
Other languages
English (en)
Other versions
IL80769A0 (en
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Publication of IL80769A0 publication Critical patent/IL80769A0/xx
Publication of IL80769A publication Critical patent/IL80769A/xx

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
    • H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number
    • H03L7/187—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number using means for coarse tuning the voltage controlled oscillator of the loop
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop
    • H03L7/099—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B2201/00—Aspects of oscillators relating to varying the frequency of the oscillations
    • H03B2201/02—Varying the frequency of the oscillations by electronic means
    • H03B2201/0208—Varying the frequency of the oscillations by electronic means the means being an element with a variable capacitance, e.g. capacitance diode
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L2207/00—Indexing scheme relating to automatic control of frequency or phase and to synchronisation
    • H03L2207/06—Phase locked loops with a controlled oscillator having at least two frequency control terminals
IL80769A 1986-01-06 1986-11-26 Variable capacitance circuit and its use in tuned resonant circuit IL80769A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/816,589 US4713631A (en) 1986-01-06 1986-01-06 Varactor tuning circuit having plural selectable bias voltages

Publications (2)

Publication Number Publication Date
IL80769A0 IL80769A0 (en) 1987-02-27
IL80769A true IL80769A (en) 1990-06-10

Family

ID=25221045

Family Applications (1)

Application Number Title Priority Date Filing Date
IL80769A IL80769A (en) 1986-01-06 1986-11-26 Variable capacitance circuit and its use in tuned resonant circuit

Country Status (8)

Country Link
US (1) US4713631A (de)
EP (1) EP0252943B1 (de)
JP (1) JPS63502155A (de)
AU (1) AU589738B2 (de)
CA (1) CA1282466C (de)
DE (1) DE3689633T2 (de)
IL (1) IL80769A (de)
WO (1) WO1987004304A1 (de)

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FI95522C (fi) * 1992-11-27 1996-02-12 Nokia Mobile Phones Ltd Jänniteohjattu oskillaattori, jolla on laaja taajuusalue
FI98575C (fi) * 1995-07-20 1997-07-10 Nokia Mobile Phones Ltd Viritettävä jänniteohjattu oskillaattori
US5892400A (en) * 1995-12-15 1999-04-06 Anadigics, Inc. Amplifier using a single polarity power supply and including depletion mode FET and negative voltage generator
US6243372B1 (en) 1996-11-14 2001-06-05 Omnipoint Corporation Methods and apparatus for synchronization in a wireless network
GB2330258B (en) * 1997-10-07 2001-06-20 Nec Technologies Phase locked loop circuit
US6163710A (en) * 1997-10-20 2000-12-19 Ericsson, Inc. Method and apparatus for compliance to multiple frequency plans
JP3581788B2 (ja) * 1998-05-26 2004-10-27 アルプス電気株式会社 テレビジョンチューナ
US6308055B1 (en) 1998-05-29 2001-10-23 Silicon Laboratories, Inc. Method and apparatus for operating a PLL for synthesizing high-frequency signals for wireless communications
US7035607B2 (en) 1998-05-29 2006-04-25 Silicon Laboratories Inc. Systems and methods for providing an adjustable reference signal to RF circuitry
US6167245A (en) * 1998-05-29 2000-12-26 Silicon Laboratories, Inc. Method and apparatus for operating a PLL with a phase detector/sample hold circuit for synthesizing high-frequency signals for wireless communications
US7242912B2 (en) 1998-05-29 2007-07-10 Silicon Laboratories Inc. Partitioning of radio-frequency apparatus
US6150891A (en) * 1998-05-29 2000-11-21 Silicon Laboratories, Inc. PLL synthesizer having phase shifted control signals
US6311050B1 (en) 1998-05-29 2001-10-30 Silicon Laboratories, Inc. Single integrated circuit phase locked loop for synthesizing high-frequency signals for wireless communications and method for operating same
US6304146B1 (en) 1998-05-29 2001-10-16 Silicon Laboratories, Inc. Method and apparatus for synthesizing dual band high-frequency signals for wireless communications
US6137372A (en) * 1998-05-29 2000-10-24 Silicon Laboratories Inc. Method and apparatus for providing coarse and fine tuning control for synthesizing high-frequency signals for wireless communications
US7092675B2 (en) 1998-05-29 2006-08-15 Silicon Laboratories Apparatus and methods for generating radio frequencies in communication circuitry using multiple control signals
US6226506B1 (en) 1998-05-29 2001-05-01 Silicon Laboratories, Inc. Method and apparatus for eliminating floating voltage nodes within a discreetly variable capacitance used for synthesizing high-frequency signals for wireless communications
US6574288B1 (en) 1998-05-29 2003-06-03 Silicon Laboratories Inc. Method and apparatus for adjusting a digital control word to tune synthesized high-frequency signals for wireless communications
US6147567A (en) * 1998-05-29 2000-11-14 Silicon Laboratories Inc. Method and apparatus for providing analog and digitally controlled capacitances for synthesizing high-frequency signals for wireless communications
US6233441B1 (en) 1998-05-29 2001-05-15 Silicon Laboratories, Inc. Method and apparatus for generating a discretely variable capacitance for synthesizing high-frequency signals for wireless communications
US7221921B2 (en) 1998-05-29 2007-05-22 Silicon Laboratories Partitioning of radio-frequency apparatus
US6327463B1 (en) 1998-05-29 2001-12-04 Silicon Laboratories, Inc. Method and apparatus for generating a variable capacitance for synthesizing high-frequency signals for wireless communications
US6993314B2 (en) 1998-05-29 2006-01-31 Silicon Laboratories Inc. Apparatus for generating multiple radio frequencies in communication circuitry and associated methods
FR2788638B1 (fr) * 1999-01-20 2001-05-04 Sagem Circuit d'oscillation avec dynamique etendue
US6323735B1 (en) 2000-05-25 2001-11-27 Silicon Laboratories, Inc. Method and apparatus for synthesizing high-frequency signals utilizing on-package oscillator circuit inductors
FR2832271A1 (fr) * 2001-11-13 2003-05-16 Koninkl Philips Electronics Nv Tuner comprenant un convertisseur de tension
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
DE102004020975A1 (de) * 2004-04-22 2005-11-17 Atmel Germany Gmbh Oszillator und Verfahren zum Betreiben eines Oszillators
US7646257B2 (en) * 2007-01-10 2010-01-12 Motorola, Inc. Method and apparatus to facilitate the provision and use of a plurality of varactors with a plurality of switches
JP5515379B2 (ja) * 2009-04-07 2014-06-11 アイコム株式会社 位相同期回路
DE102017208682A1 (de) * 2017-05-23 2018-11-29 Robert Bosch Gmbh Emissionsschutzvorrichtung und Verfahren zum Betreiben einer Last
CN112688607B (zh) * 2020-12-15 2023-08-15 大国重器自动化设备(山东)股份有限公司 一种伺服电机及人工智能机器人

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US3260959A (en) * 1963-12-30 1966-07-12 Collins Radio Co Tunable phase shift resonant circuit stabilized crystal oscillator
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US3492514A (en) * 1967-04-17 1970-01-27 Motorola Inc Voltage variable capacitance range extender
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US3581240A (en) * 1969-01-13 1971-05-25 Motorola Inc Frequency modulated solid state crystal oscillator providing a plurality of center frequencies
US3579281A (en) * 1969-06-04 1971-05-18 Sierra Research Corp Combining network providing compensated tuning voltage for varactor
DE2257574B1 (de) * 1972-11-24 1974-05-22 Philips Patentverwaltung Gmbh, 2000 Hamburg
US4254504A (en) * 1978-08-08 1981-03-03 International Telephone And Telegraph Corporation Control apparatus for a transceiver employing a programmable memory
US4272729A (en) * 1979-05-10 1981-06-09 Harris Corporation Automatic pretuning of a voltage controlled oscillator in a frequency synthesizer using successive approximation
FR2483704A1 (fr) * 1980-06-03 1981-12-04 Thomson Csf Dispositif de prepositionnement de frequence pour synthetiseur indirect de frequence et synthetiseur comportant un tel dispositif
US4370629A (en) * 1980-11-03 1983-01-25 Rockwell International Corporation Voltage controlled oscillator with reduced number of tuning potentiometers
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US4533881A (en) * 1982-09-03 1985-08-06 Memory Technology, Inc. Rapid starting variable frequency oscillator with minimum startup perturbations

Also Published As

Publication number Publication date
CA1282466C (en) 1991-04-02
EP0252943B1 (de) 1994-02-09
WO1987004304A1 (en) 1987-07-16
US4713631A (en) 1987-12-15
DE3689633D1 (de) 1994-03-24
AU589738B2 (en) 1989-10-19
EP0252943A1 (de) 1988-01-20
IL80769A0 (en) 1987-02-27
EP0252943A4 (de) 1989-10-25
DE3689633T2 (de) 1994-06-23
JPS63502155A (ja) 1988-08-18
AU6837187A (en) 1987-07-28

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Legal Events

Date Code Title Description
KB Patent renewed
MM9K Patent not in force due to non-payment of renewal fees