IT1250770B - Sintetizzatore di frequenza n-frazionale con accumulatore a configurazione latch con riduzione dell'errore residuo. - Google Patents

Sintetizzatore di frequenza n-frazionale con accumulatore a configurazione latch con riduzione dell'errore residuo.

Info

Publication number
IT1250770B
IT1250770B ITRM910652A ITRM910652A IT1250770B IT 1250770 B IT1250770 B IT 1250770B IT RM910652 A ITRM910652 A IT RM910652A IT RM910652 A ITRM910652 A IT RM910652A IT 1250770 B IT1250770 B IT 1250770B
Authority
IT
Italy
Prior art keywords
accumulator
residual error
latch
frequency synthesizer
output
Prior art date
Application number
ITRM910652A
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 ITRM910652A0 publication Critical patent/ITRM910652A0/it
Publication of ITRM910652A1 publication Critical patent/ITRM910652A1/it
Application granted granted Critical
Publication of IT1250770B publication Critical patent/IT1250770B/it

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/09—Modifications of modulator for regulating the mean frequency
    • 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

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Transceivers (AREA)

Abstract

Oggetto dell'invenzione è un sintetizzatore N-frazionale con accumulatore in configurazione latch avente un ridotto errore residuo, per l'impiego in ricetrasmettitori radio digitali. Il divisore del partitore di frequenza (103) del sintetizzatore viene fatto variare con il tempo attraverso la somma delle sequenze digitali di uscita di riporto dell'accumulatore, le quali comportano incrementi di frequenza uguali ad una frazione della frequenza di riferimento. Gli accumulatori (615, 617) sono collegati in latch in modo tale che, a seguito del verificarsi di un impulso di clock, i dati vengano trasferiti attraverso ciascun accumulatore un passo di impulso di clock alla volta, in modo tale che il ritardo attraverso il sistema sia uguale a quello soltanto di un accumulatore. L'uscita in latch dell'accumulatore (619) al secondo posto in ordine di altezza, viene sottratta dall'uscita in latch dell'accumulatore di ordine massimo (621) e differenziata prima di essere applicata al filtro di maglia o di anello (loop) (109).
ITRM910652A 1990-08-31 1991-08-30 Sintetizzatore di frequenza n-frazionale con accumulatore a configurazione latch con riduzione dell'errore residuo. IT1250770B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/576,333 US5093632A (en) 1990-08-31 1990-08-31 Latched accumulator fractional n synthesis with residual error reduction

Publications (3)

Publication Number Publication Date
ITRM910652A0 ITRM910652A0 (it) 1991-08-30
ITRM910652A1 ITRM910652A1 (it) 1993-03-02
IT1250770B true IT1250770B (it) 1995-04-21

Family

ID=24304000

Family Applications (1)

Application Number Title Priority Date Filing Date
ITRM910652A IT1250770B (it) 1990-08-31 1991-08-30 Sintetizzatore di frequenza n-frazionale con accumulatore a configurazione latch con riduzione dell'errore residuo.

Country Status (19)

Country Link
US (1) US5093632A (it)
JP (1) JP2750639B2 (it)
KR (1) KR960012653B1 (it)
AT (1) AT402246B (it)
AU (1) AU646304B2 (it)
BR (1) BR9105884A (it)
CA (1) CA2065857C (it)
DE (2) DE4192071C2 (it)
DK (1) DK54992D0 (it)
ES (1) ES2088715B1 (it)
FI (1) FI108381B (it)
FR (1) FR2666463B1 (it)
GB (1) GB2253752B (it)
HK (1) HK36397A (it)
IE (1) IE67055B1 (it)
IT (1) IT1250770B (it)
MX (1) MX9100851A (it)
SE (1) SE469917B (it)
WO (1) WO1992004767A1 (it)

Families Citing this family (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5161924A (en) * 1989-08-31 1992-11-10 Autocam Corporation Method and tool for concentric backchamfering on a turning machine
US5070310A (en) 1990-08-31 1991-12-03 Motorola, Inc. Multiple latched accumulator fractional N synthesis
US5701598A (en) * 1990-09-14 1997-12-23 Atkinson; Noel D. Scanning receiver with direct digital frequency synthesis and digital signal processing
US5111162A (en) * 1991-05-03 1992-05-05 Motorola, Inc. Digital frequency synthesizer having AFC and modulation applied to frequency divider
JP2857292B2 (ja) * 1991-12-18 1999-02-17 ゼロックス コーポレイション ２次元デジタルフィルタを実現するための装置
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
JP3090790B2 (ja) 1992-08-17 2000-09-25 富士通株式会社 位相同期発振器
US5436937A (en) * 1993-02-01 1995-07-25 Motorola, Inc. Multi-mode digital phase lock loop
US5347234A (en) * 1993-03-26 1994-09-13 International Business Machines Corp. Digital voltage controlled oscillator
US5337024A (en) * 1993-06-22 1994-08-09 Rockwell International Corporation Phase locked loop frequency modulator using fractional division
FR2709624B1 (fr) * 1993-08-31 1995-11-17 Sgs Thomson Microelectronics Synthétiseur de fréquence.
US5495206A (en) * 1993-10-29 1996-02-27 Motorola, Inc. Fractional N frequency synthesis with residual error correction and method thereof
US5493700A (en) * 1993-10-29 1996-02-20 Motorola Automatic frequency control apparatus
US5448763A (en) * 1993-11-09 1995-09-05 Motorola Apparatus and method for operating a phase locked loop frequency synthesizer responsive to radio frequency channel spacing
US5463351A (en) * 1994-09-29 1995-10-31 Motorola, Inc. Nested digital phase lock loop
JP3319677B2 (ja) * 1995-08-08 2002-09-03 三菱電機株式会社 周波数シンセサイザ
FI100285B (fi) * 1995-12-11 1997-10-31 Nokia Mobile Phones Ltd Taajuudenmuodostuspiiri
US5745848A (en) * 1996-03-04 1998-04-28 Motorola, Inc. Method and apparatus for eliminating interference caused by spurious signals in a communication device
US6032028A (en) * 1996-04-12 2000-02-29 Continentral Electronics Corporation Radio transmitter apparatus and method
FR2763196B1 (fr) * 1997-05-07 1999-07-30 Thomson Csf Synthetiseur de frequence coherent a boucle de phase et pas fractionnaires
US6047029A (en) * 1997-09-16 2000-04-04 Telefonaktiebolaget Lm Ericsson Post-filtered delta sigma for controlling a phase locked loop modulator
US6011815A (en) * 1997-09-16 2000-01-04 Telefonaktiebolaget Lm Ericsson Compensated ΔΣ controlled phase locked loop modulator
NZ335198A (en) * 1999-04-14 2000-11-24 Tait Electronics Ltd Cascaded sigma-delta modulators for fractional-N-division phase-lock-loop frequency systhesizer
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
US6278333B1 (en) 2000-02-29 2001-08-21 Motorola, Inc. Phase lock loop with dual state charge pump and method of operating the same
US6347233B1 (en) 2000-05-12 2002-02-12 Motorola, Inc. Digital waveform generator apparatus and method therefor
KR100346839B1 (ko) 2000-10-10 2002-08-03 삼성전자 주식회사 시그마-델타 변조기를 이용한 분수-ｎ 주파수 합성 장치및 그 방법
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
US6710951B1 (en) * 2001-10-31 2004-03-23 Western Digital Technologies, Inc. Phase locked loop employing a fractional frequency synthesizer as a variable oscillator
WO2005053162A1 (ja) * 2003-11-28 2005-06-09 Fujitsu Limited Ｐｌｌ回路のσδ変調器
US7482885B2 (en) * 2005-12-29 2009-01-27 Orca Systems, Inc. Method of frequency synthesis for fast switching
US7519349B2 (en) * 2006-02-17 2009-04-14 Orca Systems, Inc. Transceiver development in VHF/UHF/GSM/GPS/bluetooth/cordless telephones
RU2379830C1 (ru) * 2008-10-28 2010-01-20 Открытое акционерное общество "Концерн "Созвездие" Цифровой синтезатор частот
RU2416158C1 (ru) * 2009-09-16 2011-04-10 Открытое акционерное общество "Концерн "Созвездие" Цифровой синтезатор частот
US8193845B2 (en) 2010-07-06 2012-06-05 Microchip Technology Incorporated Binary-weighted delta-sigma fractional-N frequency synthesizer with digital-to-analog differentiators canceling quantization noise

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3882403A (en) * 1974-03-14 1975-05-06 Gen Dynamics Corp Digital frequency synthesizer
US3928813A (en) * 1974-09-26 1975-12-23 Hewlett Packard Co Device for synthesizing frequencies which are rational multiples of a fundamental frequency
GB1560233A (en) * 1977-02-02 1980-01-30 Marconi Co Ltd Frequency synthesisers
GB2026268B (en) * 1978-07-22 1982-07-28 Racal Communcations Equipment Frequency synthesizers
GB2091960B (en) * 1981-01-27 1985-06-19 Int Standard Electric Corp High speed frequency synthesizer
FR2511564A1 (fr) * 1981-08-17 1983-02-18 Thomson Csf Synthetiseur de frequences a division fractionnaire, utilise pour une modulation angulaire numerique
GB2140232B (en) * 1983-05-17 1986-10-29 Marconi Instruments Ltd Frequency synthesisers
FR2557401B1 (fr) * 1983-12-27 1986-01-24 Thomson Csf Synthetiseur de frequences a division fractionnaire, a faible gigue de phase et utilisation de ce synthetiseur
GB2172760B (en) * 1985-02-21 1988-05-18 Plessey Co Plc Fractional-n frequency
WO1986005045A1 (en) * 1985-02-21 1986-08-28 Plessey Overseas Limited Improvement in or relating to synthesisers
DE3544371A1 (de) * 1985-12-14 1987-06-19 Wandel & Goltermann Generator mit digitaler frequenzeinstellung
US4815018A (en) * 1985-12-24 1989-03-21 Hughes Aircraft Company Spurless fractional divider direct digital frequency synthesizer and method
US4810977A (en) * 1987-12-22 1989-03-07 Hewlett-Packard Company Frequency modulation in phase-locked loops
AU617455B2 (en) * 1988-05-06 1991-11-28 Alcatel N.V. A digital frequency synthesizer
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
US4918405A (en) * 1988-10-26 1990-04-17 Hewlett-Packard Company Signal generator utilizing a combined phase locked and frequency locked loop
GB2228840B (en) * 1989-03-04 1993-02-10 Racal Dana Instr Ltd Frequency synthesisers
US5055802A (en) * 1990-04-30 1991-10-08 Motorola, Inc. Multiaccumulator sigma-delta fractional-n synthesis
US5055800A (en) * 1990-04-30 1991-10-08 Motorola, Inc. Fractional n/m synthesis

Also Published As

Publication number Publication date
DK54992A (da) 1992-04-28
ITRM910652A1 (it) 1993-03-02
FR2666463A1 (fr) 1992-03-06
AT402246B (de) 1997-03-25
SE9201351L (sv) 1992-06-22
GB2253752B (en) 1994-11-23
CA2065857C (en) 1998-04-28
JPH05503827A (ja) 1993-06-17
HK36397A (en) 1997-04-04
IE913060A1 (en) 1992-03-11
FR2666463B1 (fr) 1994-02-04
ES2088715B1 (es) 1997-02-16
DK54992D0 (da) 1992-04-28
WO1992004767A1 (en) 1992-03-19
KR920702571A (ko) 1992-09-04
IE67055B1 (en) 1996-02-21
US5093632A (en) 1992-03-03
DE4192071C2 (de) 1996-02-22
SE469917B (sv) 1993-10-04
ATA900591A (de) 1996-07-15
ITRM910652A0 (it) 1991-08-30
GB9209236D0 (en) 1992-06-24
SE9201351D0 (sv) 1992-04-29
FI108381B (fi) 2002-01-15
ES2088715A1 (es) 1996-08-16
JP2750639B2 (ja) 1998-05-13
CA2065857A1 (en) 1992-03-01
MX9100851A (es) 1992-08-10
DE4192071T (it) 1992-08-27
FI921959A0 (fi) 1992-04-30
GB2253752A (en) 1992-09-16
BR9105884A (pt) 1992-11-03
KR960012653B1 (ko) 1996-09-23
FI921959A7 (fi) 1992-04-30
AU646304B2 (en) 1994-02-17
AU8710991A (en) 1992-03-30

Similar Documents

Publication Publication Date Title
ES2088715A1 (es) Sintesis fraccional-n de acumuladores enganchados con reduccion de error residual.
SE9201350L (sv) Fraktional-n-syntes med flera laasackumulatorer
IT1261765B (it) Sintetizzatore di frequenza n-frazionale ad accumulatori multipli con ricombinazione in serie.
KR870010696A (ko) 엔코딩 장치 및 이를 구비한 아나로그-디지탈 및 디지탈-아나로그 변환기
IT1253991B (it) Metodo di gestione di messaggi radiotelefonici emessi a bassa potenza.
WO2000073848A3 (en) Optical pulse generation using a high order transfer function waveguide interferometer
US3716794A (en) Frequency dividing apparatus
GB1501235A (en) Circuit arrangement for use in a telephone set
GB1277279A (en) Electronic frequency converter
IT1184253B (it) Anello ad aggancio di fase,a modo residuo,e metodo per migliorarne l'uscita
JPS5360150A (en) Instantaneous leading-in system for digital phase lock loop
ES2048681B1 (es) Sintetizador digital de frecuencias.
ES393457A1 (es) Una disposicion de circuito-de memoria electrica que puede utilizarse para proporcionar impulsos de discado telefoni- cos.
US3766546A (en) Converter for segment companded pcm codes
US3860799A (en) Circuit for ergodic processing of periodic and aperiodic signals
ITMI920108A0 (it) Metodo per la realizzazione di una rete di connessio per segnali appartenenti alla gerarchia sincrona sdh (synchrronous digital hierarchy) e circuiti integrati per l'implementazione del metodo
Milch A probabilistic proof of a formula for Jacobi polynomials by L. Carlitz
ES2152354T3 (es) Modo de operacion de un radar de impulsos.
Sficas et al. On the oscillatory and asymptotic behavior of a class of differential equations with deviating arguments
IT9022495A0 (it) Sistema per la riduzione del rumore di fase introdotto dalla rete sdh (synchronous digital hierarchy) mediante giustificazione di puntatore e circuiti integrati per l'implementazione del sistema
FR2243558A1 (en) Analogue-digital converter using operational amplifier - for pulse code modulation telephone signals
Diestel Sequential Convergence of Operators on Orlicz Spaces of Lebesgue-Bochner Measurable Functions in Various Operator Topologies and Some Applications
ES433188A1 (es) Un dispositivo para convertir una senal analogica de entra-da en una senal de salida de modulacion de codigo de impul- sos.
SAEKS Resolution space, networks and non-self-adjoint spectral theory[Interim report]
SU1092697A1 (ru) Преобразователь частоты следовани импульсов

Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19960722