US Patent 7463176 DAC module and applications thereof

A digital to analog conversion (DAC) module includes a digital to analog converter, a sample and hold circuit, and a switch module. The digital to analog converter is coupled to convert a digital signal into an analog signal. The sample and hold circuit is coupled to sample the analog signal to produce a sampled analog signal. The switch module is coupled to provide the analog signal as an output of the DAC module when the DAC module in a first mode and to output the analog signal to the sample and hold circuit when the DAC module in a second mode, wherein the sampled analog signal provides the output of the DAC module in the second mode.