Pade approximation convert circuit of direct digital frequency synthesizer
US8060547B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2007 |
| Grant date | Nov 15, 2011 |
| Priority date | — |
| Expiry date | Sep 14, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F7/68
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
This invention relates to Pade approximation convert circuit of the direct digital frequency synthesizer in which a multiplier receives and multiplies a first input signal and a variable signal so as to produce a multiplication signal; a divider receives and divides a second input signal and a variable signal so as to produce a division signal; an adder receives and adds the multiplication signal and the division signal so as to generate an output signal, that is then returned back to the divider. A quarter period of a sinusoidal wave signal is completed by the proceeding of direct calculation two times such that the time for the calculation of a complete sinusoidal wave can be saved and the area of the calculation circuit can be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.