1. In an exponentiation circuit having an input signal x, a method for generating an exponential signal x.sup.g, the method comprising the following steps: (a) generating a binary log value having a plurality of bits by performing a logarithmic conversion on the input signal; (b) shifting the plurality of bits of the binary log value to generate an intermediate value; (c) arithmetically combining the intermediate value and a stored value to produce a combined value, wherein the step of combining is selected from the group consisting of: (i) adding the intermediate value to the stored value to produce the combined value; and (ii) subtracting the intermediate value from the stored value to produce the combined value; and (d) generating the exponential signal by performing an inverse-logarithmic conversion on the combined value.