Patent ID: 6281819
Filing Date: 2001-08-28
Classification: H03M

Abstract:
A method for ENOB (effective number of bits) estimation for an ADC (analog-to-digital converter) based on dynamic deviation, comprising steps of:(a) building up the distributions of dynamic deviations for the interested input frequencies at which ENOBs will be estimated;(b) calculating the ideal values that are sampled by an ADC in an ideal case according to the frequency and amplitude of the sinusoid and sampling rate of ADC;(c) calculating the ideal codes with respect to the ideal values according to step (b);(d) calculating the estimated codes by adding variations to the ideal codes according to step (c) with respect to the distributions of dynamic deviations according to step (a); and(e) estimating ENOB by performing FFT operations on these estimated codes according to step (d).