digital analog conversion process, very strong momentum.

摘要

the invention relates to a method of analog / digital conversion (with a wide range of conversion and a high dynamic scanning.this process was also a resolution conversion is independent of the range of signal conversion to scan.it can be used for the conversion of an analog signal in digital, varying in a wide range of measurement.the method is based on the decomposition of the signal to be converted into two parts: a whole part and a fractional part.these two parts are obtained by using a system of prior period signal to be converted.the operating system is composed of two modules with periodic transfer function) and out of phase, period.the numerical value of the fraction is obtained by conversion and within a time period. the entire part is obtained by counting the number of times.the resolution conversion is always equal to eo (2n - 1) regardless of the dynamics of the signal (n being the number of bits on the scanning of the fractional part.the parameters can be changed) and thereby adjust the resolution conversion of the fractional part.according to this processthe signal (e) to transform may be written as e = k) / (2n - 1) + i (k, i) for the integer values of, respectively, the whole part of the fractions.discretionary). k is between 0 and (n - 1) and an integer.