Patent ID: 6611854
Filing Date: 2003-08-26
Classification: G06F

Abstract:
An apparatus for creating a desired distortion characteristic in an input signal, the apparatus comprising:an input circuit receiving the input signal, the input signal being denoted as x; a memory containing the distortion characteristic defined in terms of a number of harmonics and relative levels of the harmonics; a processor coupled to the input circuit and coupled to the memory, the processor applying the distortion characteristic to the input signal x to produce a distorted output signal y, wherein y=A1*sin(arcsin(x))+A2*cos(2*arcsin(x))+A3*sin(3*arcsin(x))+A4*cos(4*arcsin(x))+ . . . An*sin(n*arcsin(x))+A(n+1)*cos((n+1)*arcsin(x)), where A is the amplitude of the harmonic level for a given harmonic, 1 being the fundamental, n is an odd number and (n+1) represents the highest harmonic of interest.