CA2040848A1 - Pll frequency synthesizer - Google Patents

Pll frequency synthesizer

Info

Publication number
CA2040848A1
CA2040848A1 CA2040848A CA2040848A CA2040848A1 CA 2040848 A1 CA2040848 A1 CA 2040848A1 CA 2040848 A CA2040848 A CA 2040848A CA 2040848 A CA2040848 A CA 2040848A CA 2040848 A1 CA2040848 A1 CA 2040848A1
Authority
CA
Canada
Prior art keywords
frequency
phase
pll
output
frequency synthesizer
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.)
Granted
Application number
CA2040848A
Other languages
French (fr)
Other versions
CA2040848C (en
Inventor
Hidehiko Norimatsu
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.)
NEC Corp
Original Assignee
Hidehiko Norimatsu
Nec Corporation
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 Hidehiko Norimatsu, Nec Corporation filed Critical Hidehiko Norimatsu
Publication of CA2040848A1 publication Critical patent/CA2040848A1/en
Application granted granted Critical
Publication of CA2040848C publication Critical patent/CA2040848C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
    • H03L7/087—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using at least two phase detectors or a frequency and phase detector in 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
    • H03L7/107—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a variable transfer function for the loop, e.g. low pass filter having a variable bandwidth
    • H03L7/1075—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a variable transfer function for the loop, e.g. low pass filter having a variable bandwidth by changing characteristics of the loop filter, e.g. changing the gain, changing the bandwidth
    • 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
    • H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
    • H03L7/089—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector generating up-down pulses
    • H03L7/0891—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector generating up-down pulses the up-down pulses controlling source and sink current generators, e.g. a charge pump
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S331/00—Oscillators
    • Y10S331/02—Phase locked loop having lock indicating or detecting means

Abstract

A phase locked loop (PLL) frequency synthesizer capable of switching the output frequency thereof at high speed. The frequency synthesizer has a second phase/frequency comparator and a second variable frequency divider in addition to a first phase/frequency comparator which is included in a PLL. The synthesizer switches over the time constant of a loop filter by the output of the second phase/frequency comparator, i. e., independently of the PLL which is responsive to the output of the first phase/frequency comparator. As a result, the time constant of the loop filter is switched over at an advanced timing to thereby reduce PLL tuning time.
CA002040848A 1990-04-19 1991-04-19 Pll frequency synthesizer Expired - Fee Related CA2040848C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2-103414 1990-04-19
JP2103414A JP2841693B2 (en) 1990-04-19 1990-04-19 PLL frequency synthesizer

Publications (2)

Publication Number Publication Date
CA2040848A1 true CA2040848A1 (en) 1991-10-20
CA2040848C CA2040848C (en) 1996-04-23

Family

ID=14353388

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002040848A Expired - Fee Related CA2040848C (en) 1990-04-19 1991-04-19 Pll frequency synthesizer

Country Status (6)

Country Link
US (1) US5113152A (en)
EP (1) EP0453280B1 (en)
JP (1) JP2841693B2 (en)
AU (1) AU632024B2 (en)
CA (1) CA2040848C (en)
DE (1) DE69112477T2 (en)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0548450A (en) * 1991-08-08 1993-02-26 Fujitsu Ltd Pll synthesizer circuit
DE4200816A1 (en) * 1992-01-15 1993-07-22 Bosch Gmbh Robert FREQUENCY AND PHASE MODULATOR FOR DIGITAL MODULATORS OR DIGITAL TRANSMISSION, IN PARTICULAR FOR RADIO TRANSMISSION
JPH05291950A (en) * 1992-04-15 1993-11-05 Mitsubishi Electric Corp Phase locked loop frequency synthesizer
US5307071A (en) * 1992-04-17 1994-04-26 Hughes Aircraft Company Low noise frequency synthesizer using half integer dividers and analog gain compensation
US5315623A (en) * 1992-08-04 1994-05-24 Ford Motor Company Dual mode phase-locked loop
US5420545A (en) * 1993-03-10 1995-05-30 National Semiconductor Corporation Phase lock loop with selectable frequency switching time
CA2156269C (en) * 1993-03-18 1999-08-03 Hiroshi Horie Frequency synthesizer
US5703539A (en) * 1993-12-17 1997-12-30 Motorola, Inc. Apparatus and method for controlling the loop bandwidth of a phase locked loop
US5794130A (en) * 1994-04-26 1998-08-11 Funai Electric Engineering Company Limited Wireless communication system having improved PLL circuits
JPH0879074A (en) * 1994-09-05 1996-03-22 Mitsubishi Electric Corp Phase locked loop circuit
US5610955A (en) * 1995-11-28 1997-03-11 Microclock, Inc. Circuit for generating a spread spectrum clock
US5815694A (en) * 1995-12-21 1998-09-29 International Business Machines Corporation Apparatus and method to change a processor clock frequency
US5943382A (en) * 1996-08-21 1999-08-24 Neomagic Corp. Dual-loop spread-spectrum clock generator with master PLL and slave voltage-modulation-locked loop
JPH10233816A (en) * 1997-02-21 1998-09-02 Sharp Corp Digital satellite receiver
US6373912B1 (en) * 1997-06-16 2002-04-16 Legerity, Inc. Phase-locked loop arrangement with fast lock mode
JPH1139806A (en) * 1997-07-14 1999-02-12 Oki Electric Ind Co Ltd Clock multiplying circuit
GB2341285B (en) * 1998-09-02 2001-12-19 Nec Technologies Frequency synthesisers
JP3532861B2 (en) * 2001-02-06 2004-05-31 松下電器産業株式会社 PLL circuit
JP4504580B2 (en) * 2001-02-20 2010-07-14 ルネサスエレクトロニクス株式会社 Multiplication PLL circuit
US6501307B1 (en) 2001-11-12 2002-12-31 Pericom Semiconductor Corp. Spread-spectrum clock buffer/driver that modulates clock period by switching loads
JP4236998B2 (en) * 2003-02-19 2009-03-11 株式会社神戸製鋼所 Oscillator
US6864753B2 (en) * 2002-06-11 2005-03-08 The Regents Of The University Of California Stabilization technique for phase-locked frequency synthesizers
FR2846164A1 (en) * 2002-10-17 2004-04-23 St Microelectronics Sa METHOD AND DEVICE FOR GENERATING A SIGNAL HAVING A FREQUENCY EQUAL TO THE PRODUCT OF A REFERENCE FREQUENCY BY A REAL NUMBER
US6714085B1 (en) 2002-10-24 2004-03-30 General Dynamics Decision Systems, Inc Prepositioned frequency synthesizer and method therefor
US7542483B1 (en) * 2003-06-25 2009-06-02 Cisco Technology, Inc. Recoverable reference clock architecture for SONET/SDH and ethernet mixed bidirectional applications
US6980060B2 (en) * 2003-10-23 2005-12-27 International Business Machines Corporation Adaptive method and apparatus to control loop bandwidth of a phase lock loop
US7586344B1 (en) * 2007-10-16 2009-09-08 Lattice Semiconductor Corporation Dynamic delay or advance adjustment of oscillating signal phase
US8024120B2 (en) * 2008-05-16 2011-09-20 Turner Larry A Complex phase locked loop

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3421105A (en) * 1967-02-28 1969-01-07 Nasa Automatic acquisition system for phase-lock loop
US3956710A (en) * 1974-11-20 1976-05-11 Motorola, Inc. Phase locked loop lock detector and method
US4745371A (en) * 1985-08-02 1988-05-17 Libera Developments Limited Phase-locked digital synthesizer
US4771249A (en) * 1987-05-26 1988-09-13 Motorola, Inc. Phase locked loop having a filter with controlled variable bandwidth
US5027087A (en) * 1990-02-02 1991-06-25 Motorola, Inc. Fast-switching frequency synthesizer
CA2043054C (en) * 1990-05-23 1994-12-06 Osamu Ichiyoshi Phase-lock loop device operable at a high speed
DE69130046T2 (en) * 1990-10-22 1999-05-06 Nec Corp Frequency synthesizer with PLL, which enables a frequency change of the output at high speed

Also Published As

Publication number Publication date
US5113152A (en) 1992-05-12
EP0453280A1 (en) 1991-10-23
AU632024B2 (en) 1992-12-10
JP2841693B2 (en) 1998-12-24
DE69112477T2 (en) 1996-05-02
EP0453280B1 (en) 1995-08-30
CA2040848C (en) 1996-04-23
JPH042218A (en) 1992-01-07
DE69112477D1 (en) 1995-10-05
AU7514991A (en) 1991-10-24

Similar Documents

Publication Publication Date Title
CA2040848A1 (en) Pll frequency synthesizer
CA2036135A1 (en) Phase locked loop including non-integer multiple frequency reference signal
CA2025164A1 (en) Adaptive phase lock loop system
CA2125441A1 (en) Synchronized Clock Using a Non-Pullable Reference Oscillator
CA2125443A1 (en) Digitally controlled fractional frequency synthesizer
MY105977A (en) Digital time base generator with adjustable delay between two outputs.
AU8602191A (en) Pll frequency synthesizer capable of changing an output frequency at a high speed
CA2049346A1 (en) Fast-switching frequency synthesizer
CA2139904A1 (en) PLL Synthesizer and Method of Controlling the Same
JPS641330A (en) Frequency synthesizer
EP0378190A3 (en) Digital phase locked loop
CA2192881A1 (en) PLL Circuit and Noise Reduction Means for PLL Circuit
EP0357374A3 (en) Phase-locked loop
JPS56158536A (en) Pil oscillation circuit
CA2093040A1 (en) Frequency synthesizer using phase-locked loop
CA2090523A1 (en) Frequency synthesizer and frequency synthesizing method
JPS55141833A (en) Phase locked loop circuit
EP0346623A3 (en) A circuit for high-efficiency tuning video frequencies
JPS56162580A (en) Pll circuit
FR2290782A1 (en) Voltage controlled oscillator - has array of switched capacitors and varactor diode to set in phase locked loop
JPS5527786A (en) Video modulator
JPS6432532A (en) Phase locked loop circuit
JPS5582568A (en) Afc circuit
JPH07154252A (en) Phase locked loop circuit
JPS6489620A (en) N-fraction type frequency synthesizer

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed