Patent Document ID: 20080109504
Application ID: 11540810
Patent Flag: 0

Claim One:
1. Apparatus for generating a sinusoidal signal, the apparatus comprising: a) a digital to analog converter having a digital input and an analog output, the digital to analog converter adapted to produce an analog signal at the analog output representative of digital values at the digital input, the analog signal comprising an error represented by a conversion error function; b) a first circuit having an output providing a plurality of values approximating at least a portion of a sinusoidal signal, the plurality of values comprising an approximation error; and c) a second circuit coupled between the output of the first circuit and the digital input of the digital to analog converter, the second circuit adapted to distort the values at the output of the first circuit to compensate, at least in part, for the conversion error function of the digital to analog converter and the approximation error of the first circuit.