Patent ID: 7023371

Claim:
An image canceling digital-to-analog converter (DAC) comprising: an up-sampler for receiving a first stream of digital values at a first sample rate, the first stream of digital values representative of a first signal, each of the digital values comprising a first number of bits, the up-sampler producing, at a second sample rate, a second stream of digital values based upon the first stream of digital values; a clock source producing a plurality of clock signals substantially equally spaced in time; a plurality of digital-to-analog converters, each of the plurality of digital-to-analog converters periodically accepting, under control of one of the plurality of clock signals, a digital value from the second stream of digital values, the outputs from the plurality of digital-to-analog converters forming a plurality of analog output signals; a combiner adapted to combine the plurality of analog output signals to form a combined output signal; and a noise shaper for adjusting selected digital values of the second stream of digital values in order to minimize spectral images in the combined output signal.