Pade approximation convert circuit of direct digital...

Details Pade approximation convert circuit of direct digital... Pade approximation convert circuit of direct digital...

2007-11-13

2011-11-15

Ngo, Chuong D (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

C708S276000

Reexamination Certificate

active

08060547

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.

REFERENCES:
patent: 7398173 (2008-07-01), Laraia et al.
patent: 2006/0085728 (2006-04-01), Lestable

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