Patent ID: 6522176
Filing Date: 2003-02-18
Classification: G06F

Abstract:
A direct digital synthesizer for generating an output signal within a frequency band, the direct digital synthesizer comprising:an input section receiving a phase differential value and generating a phase angle value; a phase-amplitude converter generating an amplitude value in response to the phase angle value; a band-shaped dither generator for generating a dither value; a first combiner summing the amplitude value and the dither value to define a first combined value; a second combiner differencing the amplitude value and the dither value to define a second combined value; a first digital-to-analog converter (DAC) for converting the first combined value to a first analog signal; a second digital-to-analog converter (DAC) for converting the second combined value to a second analog signal; and an output combiner for combining the first analog signal and the second analog signal to generate the output signal.