Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Pulse repetition rate
Reexamination Certificate
2007-12-12
2008-11-18
Do, Chat C (Department: 2193)
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Pulse repetition rate
C708S200000
Reexamination Certificate
active
07454450
ABSTRACT:
A mixed-signal system for performing Taylor series function approximations is disclosed. The mixed-signal system includes a digital-to-analog converter (DAC), multiple resistor-to-resistor (R2R) ladders, various digital registers, a digital processor and an analog integrator. The digital processor calculates coefficients F, Fx, Fy, Fxx, Fxy, Fyyof a Taylor series equation and calculates distance functions. The digital processor also includes a digital register for storing a magnitude scaling factor φ(x0,y0) of the Taylor series equation. The DAC control register uploads a lead term F(x0,y0) of the Taylor series equation from the digital processor to the DAC. The first-order digital registers controls resistances of the R2R ladders. The second-order digital registers uploads coefficients Fx, Fy, Fxx, Fxy, Fyyof the Taylor series equation from the digital processor to the DAC. The analog integrator adds outputs from the DAC and the R2R ladder to generate approximation results for the Taylor series equation.
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patent: 5327137 (1994-07-01), Scheerer et al.
patent: 2004/0010532 (2004-01-01), Lu
patent: 2007/0007929 (2007-01-01), Lee et al.
Carlen, Topic: Taylor's Theorem with Several Variables, Apr. 4, 2004, pp. 1-13, http://www.math.gatech.edu/˜carlen/2507
otes/Taylor.html.
Bryant Michael D.
Fernandez Benito R.
Remy Brian
Yan Shouli
Dillon & Yudell LLP
Do Chat C
Ng Antony P.
The Board of regents, The University of Texas System
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