JP4277091B2 - Ddsパルス発生装置 - Google Patents
Ddsパルス発生装置 Download PDFInfo
- Publication number
- JP4277091B2 JP4277091B2 JP2004366070A JP2004366070A JP4277091B2 JP 4277091 B2 JP4277091 B2 JP 4277091B2 JP 2004366070 A JP2004366070 A JP 2004366070A JP 2004366070 A JP2004366070 A JP 2004366070A JP 4277091 B2 JP4277091 B2 JP 4277091B2
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- Prior art keywords
- phase
- value
- dds
- accumulator
- pulse
- Prior art date
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- 230000000630 rising effect Effects 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 12
- 238000013507 mapping Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 17
- 208000019300 CLIPPERS Diseases 0.000 description 7
- 208000021930 chronic lymphocytic inflammation with pontine perivascular enhancement responsive to steroids Diseases 0.000 description 7
- 230000010363 phase shift Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
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Classifications
-
- 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
- G06F1/0328—Waveform generators, i.e. devices for generating periodical functions of time, e.g. direct digital synthesizers in which the phase increment is adjustable, e.g. by using an adder-accumulator
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Manipulation Of Pulses (AREA)
Description
14 位相アキュムレータ回路
16 アドレス・マッパー
18 ルックアップ・テーブル
20 位相アキュムレータ・レジスタ
22 マルチプレクサ
24 加算器
26 位相アキュムレータ回路部
30 加算器
32 マルチプレクサ
32 出力マルチプレクサ
34 エッジ・マッパー・モジュール
36 拡大モジュール
38 クリッパー・モジュール
40 レジスタ
42 レジスタ
44 A比較器
46 B比較器
48 マルチプレクサ
50 出力マルチプレクサ
52 掛算器
54 シフター
56 比較器
58 マルチプレクサ
60 出力マルチプレクサ
φ 位相アキュムレータ値
Claims (3)
- アキュムレータ及び波形ルックアップ・テーブルを有するDDSパルス発生装置であって、
パルス出力信号のエッジの個所を変更することなく、プログラム制御可能な法の値を用いて上記パルス出力信号の周期を変更する変更手段と、
上記パルス出力信号の立ち上がり及び立ち下がりエッジを定めるアキュムレータ値の特定の範囲を上記波形ルックアップ・テーブルの一部分にマッピングするマッピング手段とを具えるDDSパルス発生装置。 - 上記マッピング手段が、
上記パルス出力信号の上記立ち上がり及び立ち下がりエッジを定めて初期アドレス値を供給するために上記立ち上がり及び立ち下がりエッジを上記波形ルックアップ・テーブルの一部分にマッピングする手段と、
上記初期アドレス値を拡大し、立ち上がり及び立ち下がりエッジ・レートを定める出力アドレス値を供給する手段と、
上記出力アドレス値を上記波形ルックアップ・テーブルのアドレス範囲内に制限するクリッピング手段とを有する請求項1記載のDDSパルス発生装置。 - 複数の位相アキュムレータと対応する複数の波形ルックアップ・テーブルを有するDDSパルス発生装置であって、各位相アキュムレータが
パルス出力信号のエッジ個所を変更することなく、プログラム制御可能な法の値を用いて上記パルス出力信号の周期を変更する変更手段と、
上記パルス出力信号の立ち上がり及び立ち下がりエッジを定めるアキュムレータ値の特定範囲を対応する上記波形ルックアップ・テーブルにマッピングする手段と、
ある位相アキュムレータとその次のものとの間にオフセットを設ける手段と、
上記複数の位相アキュムレータからの複数の位相アキュムレータ値を組み合わせて、上記複数の位相アキュムレータの各サイクルについて、出力信号として1つの位相アキュムレータ値を生成する手段と
を具えるDDSパルス発生装置。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/739,591 US7284025B2 (en) | 2003-12-18 | 2003-12-18 | DDS pulse generator architecture |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005184832A JP2005184832A (ja) | 2005-07-07 |
JP4277091B2 true JP4277091B2 (ja) | 2009-06-10 |
Family
ID=34677647
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004366070A Expired - Fee Related JP4277091B2 (ja) | 2003-12-18 | 2004-12-17 | Ddsパルス発生装置 |
Country Status (2)
Country | Link |
---|---|
US (1) | US7284025B2 (ja) |
JP (1) | JP4277091B2 (ja) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7539716B2 (en) * | 2005-01-26 | 2009-05-26 | Pentomics, Inc. | Method and apparatus for improved direct digital frequency synthesizer |
US7952516B2 (en) * | 2006-09-26 | 2011-05-31 | Lockheed Martin Corporation | System and method for coherent frequency switching in DDS architectures |
JP4369497B2 (ja) * | 2007-05-17 | 2009-11-18 | 株式会社日立製作所 | ダイレクト・デジタル・シンセサイザおよびそれを用いた核磁気共鳴装置 |
FR2922697A1 (fr) * | 2007-10-22 | 2009-04-24 | St Microelectronics Sa | Synthetiseur de frequence numerique |
US7714623B2 (en) * | 2008-04-09 | 2010-05-11 | Ut-Battelle, Llc | Agile high resolution arbitrary waveform generator with jitterless frequency stepping |
CN102468805B (zh) * | 2010-11-03 | 2016-01-20 | 北京普源精电科技有限公司 | 一种扫频信号发生器及扫频信号的产生方法 |
CN102520217B (zh) * | 2011-11-25 | 2014-07-02 | 北京遥测技术研究所 | 低资源消耗多路波形发生器及其实现方法 |
CN103178782B (zh) * | 2011-12-21 | 2016-08-03 | 北京普源精电科技有限公司 | 一种扫频信号发生器 |
CN103888105B (zh) * | 2014-04-14 | 2016-10-26 | 优利德科技(中国)有限公司 | 一种宽频率连续可调的脉宽波数字产生方法及系统 |
CN104917494B (zh) * | 2015-05-08 | 2017-10-31 | 深圳市鼎阳科技有限公司 | 一种函数信号发生器 |
US10686432B2 (en) * | 2018-08-24 | 2020-06-16 | Synaptics Incorporated | Waveform generation circuit for finely tunable sensing frequency |
DE102020132878B3 (de) * | 2020-12-09 | 2022-05-19 | Elmos Semiconductor Se | Leuchte und Verfahren mit biologisch unbedenkliche Ansteuerung von LED-Leuchtmitteln |
CN113434006B (zh) * | 2021-07-08 | 2022-06-03 | 电子科技大学 | 一种基于dds的高分辨率脉冲波形产生装置 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5430764A (en) * | 1993-09-01 | 1995-07-04 | Grand Valley State University | Direct digital frequency synthesizer |
US6249155B1 (en) * | 1997-01-21 | 2001-06-19 | The Connor Winfield Corporation | Frequency correction circuit for a periodic source such as a crystal oscillator |
US6066967A (en) * | 1997-02-07 | 2000-05-23 | Sensytech, Inc. | Phase-coherent frequency synthesis with a DDS circuit |
US6307441B1 (en) * | 1997-12-31 | 2001-10-23 | Texas Instruments Incorporated | Shape modulation transmit loop with digital frequency control and method for same |
-
2003
- 2003-12-18 US US10/739,591 patent/US7284025B2/en active Active
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2004
- 2004-12-17 JP JP2004366070A patent/JP4277091B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2005184832A (ja) | 2005-07-07 |
US20050134330A1 (en) | 2005-06-23 |
US7284025B2 (en) | 2007-10-16 |
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