Direct digital synthesizer
US6753706B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 18, 2002 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Nov 18, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B28/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A direct digital synthesizer (DDS) for generating a waveform output according to a frequency input and a clock signal is provided. The direct digital synthesizer includes: a code generator for generating a digital code in response to the frequency input and the clock signal, a digital-analog converter (DAC) electrically connected with the code generator and comprising plural difference weighted coefficients for generating an analog waveform through an operation of the plural difference weighted coefficient and the digital code, and a filter electrically connected with the difference weighted digital-analog converter (DAC) for filtering the analog waveform to generate the waveform output. The provided direct digital synthesizer is able to generate all kinds of periodic waveforms with different phases without the conventional wave lookup ROM-table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.