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GB2120478B - Voltage controlled oscillator - Google Patents

Voltage controlled oscillator

Info

Publication number
GB2120478B
GB2120478B GB08211746A GB8211746A GB2120478B GB 2120478 B GB2120478 B GB 2120478B GB 08211746 A GB08211746 A GB 08211746A GB 8211746 A GB8211746 A GB 8211746A GB 2120478 B GB2120478 B GB 2120478B
Authority
GB
United Kingdom
Prior art keywords
controlled oscillator
voltage controlled
voltage
oscillator
controlled
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
Application number
GB08211746A
Other versions
GB2120478A (en
Inventor
Douglas Frank George Dwyer
John Mark Baker
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB08211746A priority Critical patent/GB2120478B/en
Priority to DE19833313868 priority patent/DE3313868A1/en
Publication of GB2120478A publication Critical patent/GB2120478A/en
Application granted granted Critical
Publication of GB2120478B publication Critical patent/GB2120478B/en
Expired legal-status Critical Current

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
    • 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
    • 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
    • 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
    • H03L7/10—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range
    • H03L7/101—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using an additional control signal to the controlled loop oscillator derived from a signal generated in the loop
    • H03L7/102—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using an additional control signal to the controlled loop oscillator derived from a signal generated in the loop the additional signal being directly applied to the controlled loop oscillator
    • H03L7/103—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using an additional control signal to the controlled loop oscillator derived from a signal generated in the loop the additional signal being directly applied to the controlled loop oscillator the additional signal being a digital signal
    • 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
GB08211746A 1982-04-22 1982-04-22 Voltage controlled oscillator Expired GB2120478B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB08211746A GB2120478B (en) 1982-04-22 1982-04-22 Voltage controlled oscillator
DE19833313868 DE3313868A1 (en) 1982-04-22 1983-04-16 VOLTAGE CONTROLLED OSCILLATOR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08211746A GB2120478B (en) 1982-04-22 1982-04-22 Voltage controlled oscillator

Publications (2)

Publication Number Publication Date
GB2120478A GB2120478A (en) 1983-11-30
GB2120478B true GB2120478B (en) 1985-10-16

Family

ID=10529885

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08211746A Expired GB2120478B (en) 1982-04-22 1982-04-22 Voltage controlled oscillator

Country Status (2)

Country Link
DE (1) DE3313868A1 (en)
GB (1) GB2120478B (en)

Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI107093B (en) 1997-09-24 2001-05-31 Nokia Networks Oy Automatic tuning of the integrated oscillator
DE3721154A1 (en) * 1987-06-26 1989-01-05 Wegmann & Co FREQUENCY SYNTHESIZER
US4893087A (en) * 1988-01-07 1990-01-09 Motorola, Inc. Low voltage and low power frequency synthesizer
DE3920008A1 (en) * 1989-06-20 1991-01-10 Philips Patentverwaltung PHASE CONTROL CIRCUIT
JPH03235512A (en) * 1990-02-13 1991-10-21 Oki Electric Ind Co Ltd Voltage controlled oscillator circuit
US5208555A (en) * 1991-09-23 1993-05-04 Triquint Semiconductor, Inc. Circuit for limiting maximum frequency output of a voltage controlled oscillator
DE4314424A1 (en) * 1993-05-03 1994-11-10 Philips Patentverwaltung oscillator
JPH0758637A (en) * 1993-08-13 1995-03-03 Nec Corp Frequency synthesizer
GB2294830A (en) * 1993-08-13 1996-05-08 Nec Corp Frequency synthesizer
US5371425A (en) * 1993-09-10 1994-12-06 Sun Microsystems, Inc. Digital damping method and apparatus for phase-locked loops
DE4342266C2 (en) * 1993-12-10 1996-10-24 Texas Instruments Deutschland Clock generator and phase comparator for use in such a clock generator
US5686864A (en) * 1995-09-05 1997-11-11 Motorola, Inc. Method and apparatus for controlling a voltage controlled oscillator tuning range in a frequency synthesizer
EP0829143A1 (en) * 1996-04-02 1998-03-18 Koninklijke Philips Electronics N.V. Portable radio comprising a connectable circuit
GB2320628B (en) * 1996-12-18 2001-05-23 Nec Technologies Hybrid reference frequency correction system
DE19811104A1 (en) * 1998-03-13 1999-09-16 Thomson Brandt Gmbh Method of automatic switchover of bands in tuner
EP0944171A1 (en) * 1998-03-17 1999-09-22 Koninklijke Philips Electronics N.V. Electronic apparatus comprising a frequency synthesizer and process for adjusting a frequency synthesizer
GB2337382B (en) * 1998-05-16 2000-12-13 Motorola Ltd Voltage controlled oscillator
US6400930B1 (en) * 1998-11-06 2002-06-04 Dspc Israel, Ltd. Frequency tuning for radio transceivers
US6879816B2 (en) 1998-11-12 2005-04-12 Broadcom Corporation Integrated switchless programmable attenuator and low noise amplifier
US6885275B1 (en) 1998-11-12 2005-04-26 Broadcom Corporation Multi-track integrated spiral inductor
IT1303599B1 (en) * 1998-12-11 2000-11-14 Cselt Ct Studi E Lab T PHASE LOCK CIRCUIT.
GB9916907D0 (en) 1999-07-19 1999-09-22 Cambridge Silicon Radio Ltd Variable oscillator
WO2001010025A1 (en) * 1999-08-02 2001-02-08 Qualcomm Incorporated Method and apparatus for multiple band voltage controlled oscillator with noise immunity
EP1146640A1 (en) * 2000-04-10 2001-10-17 Infineon Technologies AG Integrated resonant circuit comprising tuning capacitors
EP1193875B1 (en) * 2000-09-15 2005-11-09 Alcatel Voltage-controlled oscillator with automatic center frequency calibration
US6404289B1 (en) 2000-12-22 2002-06-11 Atheros Communications, Inc. Synthesizer with lock detector, lock algorithm, extended range VCO, and a simplified dual modulus divider
US6496075B2 (en) * 2001-03-14 2002-12-17 Ericsson Inc. Automatic tuning of VCO
US7103127B2 (en) * 2001-03-30 2006-09-05 Skyworks Solutions, Inc. System for controlling the frequency of an oscillator
JP3542978B2 (en) * 2001-05-29 2004-07-14 埼玉日本電気株式会社 Frequency synchronization device and frequency synchronization control method
DE10134640B4 (en) * 2001-07-17 2005-07-14 Texas Instruments Deutschland Gmbh PLL circuit and method for automatically setting its output frequency
GB2379104A (en) * 2001-08-21 2003-02-26 Zarlink Semiconductor Ltd Voltage controlled oscillators
FR2829318B1 (en) * 2001-09-05 2003-12-12 St Microelectronics Sa PHASE LOCKED LOOP IN THE FORM OF AN INTEGRATED CIRCUIT
US6876266B2 (en) * 2002-06-10 2005-04-05 Gct Semiconductor, Inc. LC oscillator with wide tuning range and low phase noise
DE10229130B3 (en) * 2002-06-28 2004-02-05 Advanced Micro Devices, Inc., Sunnyvale PLL with automatic frequency adjustment
AU2003280497A1 (en) * 2002-06-28 2004-01-19 Advanced Micro Devices, Inc. Phase-locked loop with automatic frequency tuning
DE10251315A1 (en) * 2002-11-04 2004-05-27 Advanced Micro Devices, Inc., Sunnyvale Automatic center frequency tuning of a voltage controlled oscillator
US6778024B2 (en) 2002-11-14 2004-08-17 Gennum Corporation Dynamically trimmed voltage controlled oscillator
KR100549221B1 (en) * 2003-12-22 2006-02-03 한국전자통신연구원 Voltage controlled digital analog oscillator and frequency synthesizer using same
DE102004057186B4 (en) * 2004-11-26 2007-10-31 Texas Instruments Deutschland Gmbh PLL circuit with a voltage controlled oscillator
DE102004059987B4 (en) 2004-12-13 2010-09-30 Infineon Technologies Ag Voltage controlled oscillator circuit with analog and digital control and phase-locked loop with such an oscillator circuit
GB2445980B (en) * 2007-01-26 2009-04-22 Motorola Inc Signal generator apparatus and method of calibration therefor
US10193560B2 (en) 2016-12-28 2019-01-29 Analog Bits Inc. Method and circuits for charge pump devices of phase-locked loops
US11696406B2 (en) * 2021-04-29 2023-07-04 Microchip Technology Incorporated Automatic trimming of a PCB-based LC circuit

Also Published As

Publication number Publication date
DE3313868A1 (en) 1983-11-10
GB2120478A (en) 1983-11-30

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Legal Events

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