IT1261765B - Sintetizzatore di frequenza n-frazionale ad accumulatori multipli con ricombinazione in serie. - Google Patents
Sintetizzatore di frequenza n-frazionale ad accumulatori multipli con ricombinazione in serie.Info
- Publication number
- IT1261765B IT1261765B ITRM930074A ITRM930074A IT1261765B IT 1261765 B IT1261765 B IT 1261765B IT RM930074 A ITRM930074 A IT RM930074A IT RM930074 A ITRM930074 A IT RM930074A IT 1261765 B IT1261765 B IT 1261765B
- Authority
- IT
- Italy
- Prior art keywords
- frequency synthesizer
- synthesizer
- accumulators
- fractional frequency
- series
- Prior art date
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
- H03L7/197—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
Abstract
La presente domanda di brevetto espone l'impiego di un sintetizzatore di frequenza (903) in un radiotelefono (901). Il sintetizzatore (903) è di un tipo N-frazionale. Il sintetizzatore (903) utilizza una molteplicità di accumulatori concatenati (1000) in una rete di accumulatori, per eseguire gli integrali multipli di un segnale di ingresso (215). Le uscite degli accumulatori vengono combinate in serie per formare un segnale di uscita di dati (229). Il segnale di uscita di dati (229) viene applicato in ingresso ad una rete di divisione (111) e viene impiegato come un divisore variabile dell'ingresso di frequenza (119) nella rete di divisione (111).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/836,681 US5166642A (en) | 1992-02-18 | 1992-02-18 | Multiple accumulator fractional N synthesis with series recombination |
Publications (3)
Publication Number | Publication Date |
---|---|
ITRM930074A0 ITRM930074A0 (it) | 1993-02-10 |
ITRM930074A1 ITRM930074A1 (it) | 1994-08-10 |
IT1261765B true IT1261765B (it) | 1996-06-03 |
Family
ID=25272485
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ITRM930074A IT1261765B (it) | 1992-02-18 | 1993-02-10 | Sintetizzatore di frequenza n-frazionale ad accumulatori multipli con ricombinazione in serie. |
Country Status (14)
Country | Link |
---|---|
US (1) | US5166642A (it) |
JP (1) | JP3109100B2 (it) |
KR (1) | KR970004439B1 (it) |
CN (1) | CN1026745C (it) |
BR (1) | BR9205908A (it) |
CA (1) | CA2107771C (it) |
DE (1) | DE4294754C1 (it) |
FR (1) | FR2687522A1 (it) |
GB (1) | GB2273008B (it) |
IT (1) | IT1261765B (it) |
MX (1) | MX9300877A (it) |
RU (1) | RU2153223C2 (it) |
SE (1) | SE515879C2 (it) |
WO (1) | WO1993016523A1 (it) |
Families Citing this family (37)
Publication number | Priority date | Publication date | Assignee | Title |
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US5367691A (en) * | 1991-04-15 | 1994-11-22 | Motorola, Inc. | Pipe-staggered apparatus and method utilizing carry look-ahead signal processing |
JPH06132816A (ja) * | 1992-06-08 | 1994-05-13 | Sony Tektronix Corp | 位相ロックループ回路 |
FI96255C (fi) * | 1993-04-05 | 1996-05-27 | Tapio Antero Saramaeki | Desimointisuodatin |
US5337024A (en) * | 1993-06-22 | 1994-08-09 | Rockwell International Corporation | Phase locked loop frequency modulator using fractional division |
US5493700A (en) * | 1993-10-29 | 1996-02-20 | Motorola | Automatic frequency control apparatus |
US5495206A (en) * | 1993-10-29 | 1996-02-27 | Motorola, Inc. | Fractional N frequency synthesis with residual error correction and method thereof |
US5745848A (en) * | 1996-03-04 | 1998-04-28 | Motorola, Inc. | Method and apparatus for eliminating interference caused by spurious signals in a communication device |
US5889436A (en) * | 1996-11-01 | 1999-03-30 | National Semiconductor Corporation | Phase locked loop fractional pulse swallowing frequency synthesizer |
JP3923150B2 (ja) * | 1997-10-16 | 2007-05-30 | 日本テキサス・インスツルメンツ株式会社 | 周波数シンセサイザ |
US6112068A (en) * | 1997-12-22 | 2000-08-29 | Texas Instruments Incorporated | Phase-locked loop circuit with switchable outputs for multiple loop filters |
EP0940922B1 (en) * | 1998-03-03 | 2002-12-04 | Motorola Semiconducteurs S.A. | Frequency synthesiser |
CA2233831A1 (en) | 1998-03-31 | 1999-09-30 | Tom Riley | Digital-sigma fractional-n synthesizer |
DE69826835T2 (de) * | 1998-05-29 | 2006-02-23 | Motorola Semiconducteurs S.A. | Frequenzsynthetisierer |
US6581082B1 (en) * | 2000-02-22 | 2003-06-17 | Rockwell Collins | Reduced gate count differentiator |
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 |
JP2001298363A (ja) * | 2000-04-17 | 2001-10-26 | Matsushita Electric Ind Co Ltd | 周波数シンセサイザ装置とそれを用いた移動無線機 |
US6448831B1 (en) | 2001-06-12 | 2002-09-10 | Rf Micro Devices, Inc. | True single-phase flip-flop |
US7003049B2 (en) * | 2001-06-12 | 2006-02-21 | Rf Micro Devices, Inc. | Fractional-N digital modulation with analog IQ interface |
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 |
EP1271792A1 (en) * | 2001-06-25 | 2003-01-02 | Motorola, Inc. | Low leakage local oscillator system |
US6710951B1 (en) * | 2001-10-31 | 2004-03-23 | Western Digital Technologies, Inc. | Phase locked loop employing a fractional frequency synthesizer as a variable oscillator |
JP3934585B2 (ja) * | 2003-08-22 | 2007-06-20 | 松下電器産業株式会社 | 広帯域変調pll、広帯域変調pllのタイミング誤差補正システム、変調タイミング誤差補正方法および広帯域変調pllを備えた無線通信装置の調整方法 |
US20060067452A1 (en) * | 2004-09-24 | 2006-03-30 | Intel Corporation | Clock and data recovery circuit |
DE102005029819B4 (de) | 2005-06-27 | 2010-03-18 | Infineon Technologies Ag | Sigma-Delta-Umsetzer und Verwendung desselben |
CN1770635B (zh) * | 2005-10-28 | 2010-04-14 | 清华大学 | 预置值流水线结构相位累加器 |
US8467748B2 (en) * | 2007-03-02 | 2013-06-18 | Freescale Semiconductor, Inc. | Wireless communication unit, integrated circuit comprising a voltage controlled oscillator and method of operation therefor |
CN101803196B (zh) * | 2007-09-12 | 2012-11-14 | 日本电气株式会社 | 抖动抑制电路和抖动抑制方法 |
US8041310B2 (en) * | 2007-10-01 | 2011-10-18 | Telefonaktiebolaget Lm Ericsson (Publ) | Apparatus and methods for frequency control in a multi-output frequency synthesizer |
US8045669B2 (en) * | 2007-11-29 | 2011-10-25 | Qualcomm Incorporated | Digital phase-locked loop operating based on fractional input and output phases |
MX342236B (es) | 2010-07-23 | 2016-09-21 | Mabe S A De C V * | Metodo y perfil de secado. |
US9035682B2 (en) | 2012-12-29 | 2015-05-19 | Motorola Solutions, Inc. | Method and apparatus for single port modulation using a fractional-N modulator |
US8901974B2 (en) | 2013-01-30 | 2014-12-02 | Texas Instruments Deutschland Gmbh | Phase locked loop and method for operating the same |
US20150092636A1 (en) * | 2013-09-30 | 2015-04-02 | Broadcom Corporation | Single local oscillator architecture |
US9685966B2 (en) * | 2014-12-02 | 2017-06-20 | Mediatek Inc. | Fractional dividing module and related calibration method |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2140232B (en) * | 1983-05-17 | 1986-10-29 | Marconi Instruments Ltd | Frequency synthesisers |
GB2217535B (en) * | 1988-04-15 | 1992-12-16 | Racal Res Ltd | Digital circuit arrangement |
US4816774A (en) * | 1988-06-03 | 1989-03-28 | Motorola, Inc. | Frequency synthesizer with spur compensation |
DE3826006C1 (it) * | 1988-07-30 | 1989-10-12 | Wandel & Goltermann Gmbh & Co, 7412 Eningen, De | |
EP0408238B1 (en) * | 1989-07-08 | 1996-03-27 | Plessey Semiconductors Limited | A frequency synthesiser |
US5038117A (en) * | 1990-01-23 | 1991-08-06 | Hewlett-Packard Company | Multiple-modulator fractional-N divider |
CA2019297A1 (en) * | 1990-01-23 | 1991-07-23 | Brian M. Miller | Multiple-modulator fractional-n divider |
US5070310A (en) * | 1990-08-31 | 1991-12-03 | Motorola, Inc. | Multiple latched accumulator fractional N synthesis |
-
1992
- 1992-02-18 US US07/836,681 patent/US5166642A/en not_active Expired - Lifetime
- 1992-12-23 CA CA002107771A patent/CA2107771C/en not_active Expired - Fee Related
- 1992-12-23 BR BR9205908A patent/BR9205908A/pt not_active IP Right Cessation
- 1992-12-23 GB GB9320716A patent/GB2273008B/en not_active Expired - Lifetime
- 1992-12-23 DE DE4294754A patent/DE4294754C1/de not_active Expired - Lifetime
- 1992-12-23 WO PCT/US1992/011173 patent/WO1993016523A1/en active Application Filing
- 1992-12-23 RU RU93057883/09A patent/RU2153223C2/ru active
- 1992-12-23 JP JP05514046A patent/JP3109100B2/ja not_active Expired - Lifetime
-
1993
- 1993-02-10 IT ITRM930074A patent/IT1261765B/it active IP Right Grant
- 1993-02-17 CN CN93101809A patent/CN1026745C/zh not_active Expired - Lifetime
- 1993-02-17 FR FR9301766A patent/FR2687522A1/fr active Granted
- 1993-02-18 MX MX9300877A patent/MX9300877A/es unknown
- 1993-10-15 SE SE9303395A patent/SE515879C2/sv not_active IP Right Cessation
- 1993-10-18 KR KR93703175A patent/KR970004439B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
GB2273008B (en) | 1995-10-25 |
SE515879C2 (sv) | 2001-10-22 |
CA2107771A1 (en) | 1993-08-19 |
WO1993016523A1 (en) | 1993-08-19 |
CN1075579A (zh) | 1993-08-25 |
RU2153223C2 (ru) | 2000-07-20 |
JP3109100B2 (ja) | 2000-11-13 |
US5166642A (en) | 1992-11-24 |
FR2687522B1 (it) | 1994-12-23 |
JPH06507057A (ja) | 1994-08-04 |
MX9300877A (es) | 1993-08-01 |
SE9303395D0 (sv) | 1993-10-15 |
ITRM930074A0 (it) | 1993-02-10 |
BR9205908A (pt) | 1994-07-05 |
GB9320716D0 (en) | 1994-01-26 |
ITRM930074A1 (it) | 1994-08-10 |
CN1026745C (zh) | 1994-11-23 |
DE4294754C1 (de) | 1995-11-09 |
CA2107771C (en) | 1999-03-16 |
GB2273008A (en) | 1994-06-01 |
FR2687522A1 (fr) | 1993-08-20 |
KR970004439B1 (en) | 1997-03-27 |
SE9303395L (sv) | 1993-12-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
0001 | Granted | ||
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19990226 |