SG44455A1 - Automatic frequency control apparatus - Google Patents
Automatic frequency control apparatusInfo
- 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
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)
- Transceivers (AREA)
- Mobile Radio Communication Systems (AREA)
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 (pt) |
JP (1) | JP3000673B2 (pt) |
KR (1) | KR0166656B1 (pt) |
CN (1) | CN1036561C (pt) |
BR (1) | BR9405977A (pt) |
CA (1) | CA2150818C (pt) |
DE (2) | DE4498261C2 (pt) |
FR (1) | FR2711868B1 (pt) |
GB (1) | GB2289383B (pt) |
SE (1) | SE516224C2 (pt) |
SG (1) | SG44455A1 (pt) |
WO (1) | WO1995012253A1 (pt) |
Families Citing this family (30)
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 (en) * | 1998-12-03 | 2000-06-07 | Motorola, Inc. | Timer circuit, sequence generator arrangement, fractional-N PLL and method therefor |
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 |
US6564039B1 (en) | 2000-02-29 | 2003-05-13 | Motorola, Inc. | Frequency generation circuit and method of operating a tranceiver |
US6747987B1 (en) | 2000-02-29 | 2004-06-08 | Motorola, Inc. | Transmit modulation circuit and method of operating a transmitter |
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 |
US6779010B2 (en) | 2001-06-12 | 2004-08-17 | Rf Micro Devices, Inc. | Accumulator with programmable full-scale range |
US6385276B1 (en) | 2001-06-12 | 2002-05-07 | Rf Micro Devices, Inc. | Dual-modulus prescaler |
US6693468B2 (en) | 2001-06-12 | 2004-02-17 | Rf Micro Devices, Inc. | Fractional-N synthesizer with improved noise performance |
US7003049B2 (en) * | 2001-06-12 | 2006-02-21 | Rf Micro Devices, Inc. | Fractional-N digital modulation with analog IQ interface |
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 |
AU2002348098A1 (en) * | 2001-10-31 | 2003-05-12 | Intel Corporation | Timing recovery with varaible bandwidth phase locked loop and non-linear control paths |
EP1313220A1 (en) * | 2001-11-19 | 2003-05-21 | Motorola, Inc. | Apparatus for generating multiple clock signals of different frequency characteristics |
US7197283B1 (en) * | 2002-08-22 | 2007-03-27 | Qualcomm, Incorporated | Dynamic frequency synthesizer configuration |
DE602004007095T2 (de) * | 2004-01-30 | 2007-10-11 | Freescale Semiconductor, Inc., Austin | Doppelzugriffsmodulator mit einem Frequenzsynthetisierer |
WO2006063619A1 (en) * | 2004-12-15 | 2006-06-22 | Freescale Semiconductor, Inc | Frequency generation in a wireless communication unit |
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)
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 |
US5070310A (en) * | 1990-08-31 | 1991-12-03 | Motorola, Inc. | Multiple latched accumulator fractional N synthesis |
US5093632A (en) * | 1990-08-31 | 1992-03-03 | Motorola, Inc. | Latched accumulator fractional n synthesis with residual error reduction |
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 |
-
1993
- 1993-10-29 US US08/144,940 patent/US5493700A/en not_active Expired - Lifetime
-
1994
- 1994-09-12 DE DE4498261A patent/DE4498261C2/de not_active Expired - Fee Related
- 1994-09-12 CA CA002150818A patent/CA2150818C/en not_active Expired - Fee Related
- 1994-09-12 DE DE4498261T patent/DE4498261T1/de active Pending
- 1994-09-12 GB GB9513095A patent/GB2289383B/en not_active Expired - Fee Related
- 1994-09-12 BR BR9405977A patent/BR9405977A/pt not_active IP Right Cessation
- 1994-09-12 JP JP7512610A patent/JP3000673B2/ja not_active Expired - Lifetime
- 1994-09-12 SG SG1996000565A patent/SG44455A1/en unknown
- 1994-09-12 CN CN94190811A patent/CN1036561C/zh not_active Expired - Lifetime
- 1994-09-12 WO PCT/US1994/010324 patent/WO1995012253A1/en active Application Filing
- 1994-09-12 KR KR1019950702674A patent/KR0166656B1/ko not_active IP Right Cessation
- 1994-10-21 FR FR9412601A patent/FR2711868B1/fr not_active Expired - Fee Related
-
1995
- 1995-06-27 SE SE9502306A patent/SE516224C2/sv not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
GB9513095D0 (en) | 1995-08-30 |
KR960700578A (ko) | 1996-01-20 |
GB2289383A (en) | 1995-11-15 |
GB2289383B (en) | 1998-08-26 |
CA2150818C (en) | 1997-11-18 |
SE516224C2 (sv) | 2001-12-03 |
WO1995012253A1 (en) | 1995-05-04 |
BR9405977A (pt) | 1996-01-09 |
CN1116021A (zh) | 1996-01-31 |
SE9502306D0 (sv) | 1995-06-27 |
KR0166656B1 (ko) | 1999-02-01 |
CN1036561C (zh) | 1997-11-26 |
DE4498261C2 (de) | 1999-07-22 |
FR2711868B1 (fr) | 1997-05-09 |
JPH08505508A (ja) | 1996-06-11 |
JP3000673B2 (ja) | 2000-01-17 |
US5493700A (en) | 1996-02-20 |
FR2711868A1 (fr) | 1995-05-05 |
SE9502306L (sv) | 1995-08-29 |
DE4498261T1 (de) | 1995-12-21 |
CA2150818A1 (en) | 1995-05-04 |
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