1. In a method of converting a multibit digital data word into a corresponding analog signal, the method including the steps of multiplying weighting factors for each bit position with a value associated with each bit in a series of analog multipliers, and wherein the outputs of said analog multipliers are summed together to form the resultant analog signal, the improvement comprising: generating a probability value for each bit corresponding to the probability that the bit is a logical one as a function of measurements of voltage characteristics of each bit and noise associated with the word to be converted; and using said probability values as scaling factors to modify the outputs of said analog multipliers to thereby reduce potential for error.