Patent ID: 7405689

Claim:
A method of performing analog-to-digital conversion (A/D conversion) comprising: (a) receiving a first analog input sample signal or a scaled version thereof; (b) receiving a first digital start value signal and storing the same as a digital guessed value signal; (c) converting the digital guessed value signal into an analog guessed value counterpart signal; (d) comparing the analog guessed value counterpart signal against the received first analog input sample signal or against the scaled version thereof and generating a corresponding digital comparison signal representative of the relationship found by said analog comparison of the analog guessed value counterpart signal and the first analog input sample signal or the scaled version thereof; (e) storing the digital comparison signal as part of a digitally-expressed comparison history signal; (f) using the comparison history signal to generate a corresponding correction value signal in accordance with a predefined correction sequence algorithm; (g) combining the generated, correction value signal with the digital guessed value signal to produce a next digital guessed value signal that replaces the previous digital guessed value signal; and (h) repeating steps (c) through (g) two or more times while using the next digital guessed value signal as the digital guessed value signal until said predefined correction sequence algorithm indicates a stop condition has been reached.