Patent ID: 6553399
Filing Date: 2003-04-22
Classification: G06F

Abstract:
An improving envelope detection circuit using a peel cone approximation, comprising:an absolute value comparision mechanism including: an absolute value determining circuit for determining positive values for incoming values of x and y; and a maximum/minimum value determining circuit for determining a maximum value xm and a minimum value ym for the incoming values x and y after their positive values are determined; a read only memory for storing constant values a and b based on address signals; and a multiplier/adder mechanism for performing multiplication and addition operations on the constant values a and b from the read only memory together with values xm and ym outputted from the absolute value comparision mechanism and for outputting a square root of the sum of two squares of the values x and y; wherein the improvement comprises: a divider connected between said absolute value comparision mechanism and said read only memory to generate a quotient k with the dividend ym and the divisor xm for the address of said read only memory.