BR9904737A - Sintetizador digital direto - Google Patents

Sintetizador digital direto

Info

Publication number
BR9904737A
BR9904737A BR9904737-3A BR9904737A BR9904737A BR 9904737 A BR9904737 A BR 9904737A BR 9904737 A BR9904737 A BR 9904737A BR 9904737 A BR9904737 A BR 9904737A
Authority
BR
Brazil
Prior art keywords
digital synthesizer
digital
frequency
signals
memory
Prior art date
Application number
BR9904737-3A
Other languages
English (en)
Inventor
Robert Everest Johnson
Original Assignee
Lucent Technologies 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 Lucent Technologies Inc filed Critical Lucent Technologies Inc
Publication of BR9904737A publication Critical patent/BR9904737A/pt

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
    • H03L7/22—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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/02—Digital function generators
    • G06F1/03—Digital function generators working, at least partly, by table look-up
    • G06F1/0321—Waveform generators, i.e. devices for generating periodical functions of time, e.g. direct digital synthesizers

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

<B>SINTETIZADOR DIGITAL DIRETO<D> Sintetizador digital inclui uma memória contendo valores representando amplitudes de um sinal como por exemplo uma onda senoidal, um conversor digital/analógico para converter saídas da memória em um sinal analógico e um contador para contar através de um incremento fixo predeterminado, que opera em alta freq³ência para habilitar a geração de formas de onde de freq³ência muito precisa. O sintetizador digital tem muitas aplicações práticas, incluindo a geração de sinais precisos para extrair informação de sinais de freq³ência de rádio de entrada, obtenção de uma freq³ência precisa de um clock de baixo custo e o uso como componente de um modulador FSK para permitir seleção entre sinais de múltiplas freq³ências sem qualquer descontinuidade de fase. Finalmente, o sintetizador digital pode ser usado em combinação com uma memória de 8 bits, para gerar uma entrada de 10 bits para um conversor digital/analógico.
BR9904737-3A 1998-10-29 1999-10-19 Sintetizador digital direto BR9904737A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/181,815 US6539411B1 (en) 1998-10-29 1998-10-29 Direct digital synthesizer

Publications (1)

Publication Number Publication Date
BR9904737A true BR9904737A (pt) 2000-09-05

Family

ID=22665927

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9904737-3A BR9904737A (pt) 1998-10-29 1999-10-19 Sintetizador digital direto

Country Status (8)

Country Link
US (1) US6539411B1 (pt)
EP (1) EP0997809A3 (pt)
JP (1) JP3413137B2 (pt)
KR (1) KR20000035114A (pt)
CN (1) CN1253332A (pt)
BR (1) BR9904737A (pt)
CA (1) CA2281407A1 (pt)
TW (1) TW507424B (pt)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4652546B2 (ja) * 2000-09-21 2011-03-16 三星電子株式会社 受信機
US7356186B2 (en) * 2002-08-23 2008-04-08 Kulas Charles J Digital representation of audio waveforms using peak shifting to provide increased dynamic range
US6867625B1 (en) 2003-09-24 2005-03-15 Itt Manufacturing Enterprises, Inc. Method and apparatus for high frequency digital carrier synthesis from plural intermediate carrier waveforms
US8098376B2 (en) * 2006-09-07 2012-01-17 William Marsh Rice University Integrated embedded processor based laser spectroscopic sensor
DE102008039205A1 (de) * 2008-08-22 2010-04-22 EPROTECH Reimann e.K. Jürgen Reimann Vorrichtung und Verfahren zur Überwachung einzelner Photovoltaikmodule einer Photovoltaikanlage
CN103346808B (zh) * 2013-06-19 2015-09-09 华为技术有限公司 一种终端设备
CN104378082B (zh) 2013-08-12 2017-11-07 瑞昱半导体股份有限公司 振荡频率偏移侦测方法以及振荡频率偏移侦测电路
TWI551036B (zh) * 2013-08-22 2016-09-21 瑞昱半導體股份有限公司 振盪頻率偏移偵測方法以及振盪頻率偏移偵測電路
US20150097839A1 (en) * 2013-10-07 2015-04-09 Tektronix, Inc. Stochastic rasterization of waveform trace displays
CN105933003B (zh) * 2016-04-25 2018-07-17 中国科学院武汉物理与数学研究所 一种小型铷原子频标射频电路

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5818803B2 (ja) 1975-03-13 1983-04-14 日本電気株式会社 デジタル正弦波発生回路
JPS585874A (ja) 1981-07-01 1983-01-13 Mitsubishi Electric Corp 波形発生装置
FR2604270B1 (fr) * 1986-09-22 1991-10-18 Jutand Francis Additionneur binaire comportant un operande fixe, et multiplieur binaire parallele-serie comprenant un tel additionneur
JPH087642B2 (ja) 1988-02-16 1996-01-29 アンリツ株式会社 ディジタルファンクションジェネレータ
US5028887A (en) 1989-08-31 1991-07-02 Qualcomm, Inc. Direct digital synthesizer driven phase lock loop frequency synthesizer with hard limiter
US5019825A (en) 1989-11-24 1991-05-28 The United States Of America As Represented By The Secretary Of The Army Coherently interruptible frequency hopped chirp generator
ATE195836T1 (de) * 1990-06-05 2000-09-15 Siemens Metering Ltd Verfahren zum abfragen von stromzählern
JPH0763124B2 (ja) * 1993-02-24 1995-07-05 日本電気株式会社 直接デジタル周波数シンセサイザ
FR2702896B1 (fr) 1993-03-17 1995-06-09 Sgs Thomson Microelectronics Generateur multifrequence programmable.
JPH09205327A (ja) 1996-01-29 1997-08-05 Kokusai Electric Co Ltd 位相制御機能付き直接ディジタル周波数合成回路
US6066967A (en) * 1997-02-07 2000-05-23 Sensytech, Inc. Phase-coherent frequency synthesis with a DDS circuit
US5963607A (en) * 1997-05-02 1999-10-05 Ail Systems, Inc. Direct digital synthesizer with high resolution tracker

Also Published As

Publication number Publication date
JP2000151284A (ja) 2000-05-30
JP3413137B2 (ja) 2003-06-03
EP0997809A2 (en) 2000-05-03
TW507424B (en) 2002-10-21
CA2281407A1 (en) 2000-04-29
CN1253332A (zh) 2000-05-17
KR20000035114A (ko) 2000-06-26
EP0997809A3 (en) 2004-02-25
US6539411B1 (en) 2003-03-25

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Legal Events

Date Code Title Description
FA10 Dismissal: dismissal - article 33 of industrial property law
B11Y Definitive dismissal - extension of time limit for request of examination expired [chapter 11.1.1 patent gazette]