H - Electricity – 03 – M
Patent
H - Electricity
03
M
354/97
H03M 1/00 (2006.01) G06G 7/19 (2006.01)
Patent
CA 1187186
METHOD FOR ANALYZING A DIGITAL-TO-ANALOG CONVERTER WITH A NONIDEAL ANALOG-TO-DIGITAL CONVERTER ABSTRACT OF THE DISCLOSURE A method for statistically calibrating a digital- to-analog converter with an electronic test system. The digital-to-analog converter is excited with two state signals at each input bit which together represent a single signal with uniform amplitude probability with respect to time, and wherein each excitation signal is orthogonal with respect to all other excitation signals. The output of the digital-to- analog converter is detected by an analog-to-digital con- verter which has been calibrated by premeasured weighting coefficients with respect to two-state orthogonal signals. The digital time domain output signals are then mapped into a transform domain to obtain weighting coefficients of each bit of the output response. Finally the transform domain weight- ing coefficients are weighted by the reciprocal of the pre- measured weighting coefficients to obtain the unbiased weight of each bit of the digital-to-analog converter under test. A preferred set of excitation signals is a set of Walsh func- tion signals representing the digital equivalent of a linear ramp function.
403138
Fairchild Camera And Instrument Corporation
Smart & Biggar
LandOfFree
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