SG44455A1 - Automatic frequency control apparatus - Google Patents

Automatic frequency control apparatus

Info

Publication number
SG44455A1
SG44455A1 SG1996000565A SG1996000565A SG44455A1 SG 44455 A1 SG44455 A1 SG 44455A1 SG 1996000565 A SG1996000565 A SG 1996000565A SG 1996000565 A SG1996000565 A SG 1996000565A SG 44455 A1 SG44455 A1 SG 44455A1
Authority
SG
Singapore
Prior art keywords
control apparatus
frequency control
automatic frequency
automatic
frequency
Prior art date
Application number
SG1996000565A
Other languages
English (en)
Inventor
Alexander W Hietala
Duane C Rabe
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 SG44455A1 publication Critical patent/SG44455A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • 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
    • H03L7/22—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using more than one loop
    • H03L7/23—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using more than one loop with pulse counters or frequency dividers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • H03J7/06—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using counters or frequency dividers
    • H03J7/065—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using counters or frequency dividers the counter or frequency divider being used in a phase locked 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
    • H03L7/197—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 numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division
    • H03L7/1974—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 numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division for fractional frequency division
    • H03L7/1976—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 numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division for fractional frequency division using a phase accumulator for controlling the counter or frequency divider

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transceivers (AREA)
SG1996000565A 1993-10-29 1994-09-12 Automatic frequency control apparatus SG44455A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/144,940 US5493700A (en) 1993-10-29 1993-10-29 Automatic frequency control apparatus

Publications (1)

Publication Number Publication Date
SG44455A1 true SG44455A1 (en) 1997-12-19

Family

ID=22510844

Family Applications (1)

Application Number Title Priority Date Filing Date
SG1996000565A SG44455A1 (en) 1993-10-29 1994-09-12 Automatic frequency control apparatus

Country Status (12)

Country Link
US (1) US5493700A (fr)
JP (1) JP3000673B2 (fr)
KR (1) KR0166656B1 (fr)
CN (1) CN1036561C (fr)
BR (1) BR9405977A (fr)
CA (1) CA2150818C (fr)
DE (2) DE4498261C2 (fr)
FR (1) FR2711868B1 (fr)
GB (1) GB2289383B (fr)
SE (1) SE516224C2 (fr)
SG (1) SG44455A1 (fr)
WO (1) WO1995012253A1 (fr)

Families Citing this family (30)

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Publication number Priority date Publication date Assignee Title
US5745848A (en) * 1996-03-04 1998-04-28 Motorola, Inc. Method and apparatus for eliminating interference caused by spurious signals in a communication device
US5943613A (en) * 1996-11-07 1999-08-24 Telefonaktiebolaget Lm Ericsson Method and apparatus for reducing standby current in communications equipment
SE510523C2 (sv) * 1997-09-11 1999-05-31 Ericsson Telefon Ab L M Radiokommunikationsenhet och radiotelefon innefattande radiokommunikationsenhet
US6163710A (en) * 1997-10-20 2000-12-19 Ericsson, Inc. Method and apparatus for compliance to multiple frequency plans
EP1006659A1 (fr) * 1998-12-03 2000-06-07 Motorola, Inc. Circuit générateur de rythme, dispositif générateur de séquence, boucle à verrouillage de phase à division fractionnaire and procédé associé
FR2797965A1 (fr) * 1999-08-31 2001-03-02 Koninkl Philips Electronics Nv Procede permettant un echange de donnees entre une carte a puce et un appareil en cas d'interruption intempestive de l'alimentation de l'appareil
US6366174B1 (en) 2000-02-21 2002-04-02 Lexmark International, Inc. Method and apparatus for providing a clock generation circuit for digitally controlled frequency or spread spectrum clocking
US6747987B1 (en) 2000-02-29 2004-06-08 Motorola, Inc. Transmit modulation circuit and method of operating a transmitter
US6564039B1 (en) 2000-02-29 2003-05-13 Motorola, Inc. Frequency generation circuit and method of operating a tranceiver
TW531952B (en) * 2000-12-15 2003-05-11 Asulab Sa Numerically controlled oscillator in particular for a radiofrequency signal receiver
JP3988392B2 (ja) * 2001-01-24 2007-10-10 日本電気株式会社 携帯無線端末、ａｆｃ制御方法及びａｆｃ制御プログラム
US7003049B2 (en) * 2001-06-12 2006-02-21 Rf Micro Devices, Inc. Fractional-N digital modulation with analog IQ interface
US6385276B1 (en) 2001-06-12 2002-05-07 Rf Micro Devices, Inc. Dual-modulus prescaler
US6779010B2 (en) 2001-06-12 2004-08-17 Rf Micro Devices, Inc. Accumulator with programmable full-scale range
US6693468B2 (en) 2001-06-12 2004-02-17 Rf Micro Devices, Inc. Fractional-N synthesizer with improved noise performance
US6448831B1 (en) 2001-06-12 2002-09-10 Rf Micro Devices, Inc. True single-phase flip-flop
US6658043B2 (en) * 2001-10-26 2003-12-02 Lexmark International, Inc. Method and apparatus for providing multiple spread spectrum clock generator circuits with overlapping output frequencies
CN100413245C (zh) * 2001-10-31 2008-08-20 英特尔公司 提高通信网络中抖动容限的方法、定时恢复系统及接收器系统
EP1313220A1 (fr) * 2001-11-19 2003-05-21 Motorola, Inc. Appareil pour générer des signaux d'horloge multiples à caractéristiques différentes
US7197283B1 (en) * 2002-08-22 2007-03-27 Qualcomm, Incorporated Dynamic frequency synthesizer configuration
EP1560336B1 (fr) * 2004-01-30 2007-06-20 Freescale Semiconductor, Inc. Modulateur à double accès avec un synthétiseur de fréquence
WO2006063619A1 (fr) * 2004-12-15 2006-06-22 Freescale Semiconductor, Inc Generation de frequence dans une unite de communication sans fil
US7444534B2 (en) * 2006-01-25 2008-10-28 International Business Machines Corporation Method and apparatus for dividing a digital signal by X.5 in an information handling system
JP4855129B2 (ja) * 2006-04-26 2012-01-18 ルネサスエレクトロニクス株式会社 デジタル放送受信装置およびデジタル放送システム
US7626462B1 (en) 2006-05-02 2009-12-01 Rf Micro Devices, Inc. Fractional-N based digital AFC system with a translational PLL transmitter
US20080125060A1 (en) * 2006-07-05 2008-05-29 Via Technologies, Inc. Radio Frequency Transceiver
JP5422924B2 (ja) 2008-06-05 2014-02-19 富士通株式会社 発振装置、受信装置および発振制御方法
CN103138700B (zh) * 2013-02-02 2015-12-02 浙江雅晶电子有限公司 一种晶振自动调频机
CN103368568B (zh) * 2013-08-05 2015-12-23 深圳森虎科技股份有限公司 提高锁相环输出频率精度的方法及其锁相环频率合成器
CN104242930B (zh) * 2014-09-09 2018-03-27 长沙景嘉微电子股份有限公司 一种应用于无线收发系统的频率综合器

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI79636C (fi) * 1986-12-01 1990-01-10 Nokia Mobile Phones Ltd En baervaogsreglerande koppling av en foer en radiotelefonanordning avsedd fm-syntetisator.
JP2795323B2 (ja) * 1989-06-14 1998-09-10 富士通株式会社 位相差検出回路
JPH03224322A (ja) * 1990-01-29 1991-10-03 Toshiba Corp 選局回路
US5065408A (en) * 1990-04-26 1991-11-12 Motorola, Inc. Fractional-division synthesizer for a voice/data communications systems
JP2798142B2 (ja) * 1990-06-15 1998-09-17 三菱電機株式会社 周波数シンセサイザ
US5021754A (en) * 1990-07-16 1991-06-04 Motorola, Inc. Fractional-N synthesizer having modulation spur compensation
US5093632A (en) * 1990-08-31 1992-03-03 Motorola, Inc. Latched accumulator fractional n synthesis with residual error reduction
US5070310A (en) * 1990-08-31 1991-12-03 Motorola, Inc. Multiple latched accumulator fractional N synthesis
FR2673495B1 (fr) * 1991-02-28 1993-04-30 Alcatel Telspace Dispositif de transposition de frequence avec commande automatique de frequence.
US5111162A (en) * 1991-05-03 1992-05-05 Motorola, Inc. Digital frequency synthesizer having AFC and modulation applied to frequency divider
JPH0537435A (ja) * 1991-07-31 1993-02-12 Nec Corp Ｔｄｍａ方式に用いる局部発振周波数シンセサイザ
US5166642A (en) * 1992-02-18 1992-11-24 Motorola, Inc. Multiple accumulator fractional N synthesis with series recombination
US5256981A (en) * 1992-02-27 1993-10-26 Hughes Aircraft Company Digital error corrected fractional-N synthesizer and method

Also Published As

Publication number Publication date
CA2150818C (fr) 1997-11-18
DE4498261C2 (de) 1999-07-22
JP3000673B2 (ja) 2000-01-17
KR960700578A (ko) 1996-01-20
CA2150818A1 (fr) 1995-05-04
SE9502306D0 (sv) 1995-06-27
SE9502306L (sv) 1995-08-29
GB2289383B (en) 1998-08-26
GB2289383A (en) 1995-11-15
US5493700A (en) 1996-02-20
GB9513095D0 (en) 1995-08-30
KR0166656B1 (ko) 1999-02-01
WO1995012253A1 (fr) 1995-05-04
SE516224C2 (sv) 2001-12-03
DE4498261T1 (de) 1995-12-21
BR9405977A (pt) 1996-01-09
JPH08505508A (ja) 1996-06-11
CN1036561C (zh) 1997-11-26
FR2711868B1 (fr) 1997-05-09
FR2711868A1 (fr) 1995-05-05
CN1116021A (zh) 1996-01-31

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