GB201716751D0 - Phase locked loop circuit - Google Patents

Phase locked loop circuit

Info

Publication number
GB201716751D0
GB201716751D0 GBGB1716751.1A GB201716751A GB201716751D0 GB 201716751 D0 GB201716751 D0 GB 201716751D0 GB 201716751 A GB201716751 A GB 201716751A GB 201716751 D0 GB201716751 D0 GB 201716751D0
Authority
GB
United Kingdom
Prior art keywords
locked loop
phase locked
loop circuit
circuit
phase
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
GBGB1716751.1A
Other versions
GB2567463B (en
GB2567463A (en
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.)
COMMUNICATIONS AUDIT UK Ltd
Original Assignee
COMMUNICATIONS AUDIT UK 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 COMMUNICATIONS AUDIT UK Ltd filed Critical COMMUNICATIONS AUDIT UK Ltd
Priority to GB1716751.1A priority Critical patent/GB2567463B/en
Publication of GB201716751D0 publication Critical patent/GB201716751D0/en
Publication of GB2567463A publication Critical patent/GB2567463A/en
Application granted granted Critical
Publication of GB2567463B publication Critical patent/GB2567463B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H03L7/08—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
    • H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
    • H03L7/093—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using special filtering or amplification characteristics 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
    • H03L7/101—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
    • 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
    • H03L7/1077—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 phase or frequency detection means
    • 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
    • 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
    • H03L7/185—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 a mixer in the loop
GB1716751.1A 2017-10-12 2017-10-12 Phase locked loop circuit Active GB2567463B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1716751.1A GB2567463B (en) 2017-10-12 2017-10-12 Phase locked loop circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1716751.1A GB2567463B (en) 2017-10-12 2017-10-12 Phase locked loop circuit

Publications (3)

Publication Number Publication Date
GB201716751D0 true GB201716751D0 (en) 2017-11-29
GB2567463A GB2567463A (en) 2019-04-17
GB2567463B GB2567463B (en) 2022-08-24

Family

ID=60419193

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1716751.1A Active GB2567463B (en) 2017-10-12 2017-10-12 Phase locked loop circuit

Country Status (1)

Country Link
GB (1) GB2567463B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11817871B2 (en) * 2021-01-28 2023-11-14 Anritsu Company Frequency synthesizers having low phase noise

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4975650A (en) * 1989-07-24 1990-12-04 Motorola, Inc. Phase detector
US5982239A (en) * 1995-08-14 1999-11-09 Hitachi, Ltd. Phase locked loop circuit and a picture reproducing device
US7532038B2 (en) * 2005-07-01 2009-05-12 Via Technologies, Inc. Phase detecting circuit having adjustable gain curve and method thereof
US8378751B2 (en) * 2009-02-13 2013-02-19 Qualcomm Incorporated Frequency synthesizer with multiple tuning loops
US8222932B2 (en) * 2010-02-23 2012-07-17 Agilent Technologies, Inc. Phase-locked loop with switched phase detectors
GB2498241B (en) * 2011-10-20 2013-12-25 Renesas Mobile Corp Operating a frequency synthesizer

Also Published As

Publication number Publication date
GB2567463B (en) 2022-08-24
GB2567463A (en) 2019-04-17

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