Patent ID: 6549157
Filing Date: 2003-04-15
Classification: H03M

Abstract:
A digital-to-analog converter for generating an analog signal in response to a first clock signal having a first period and a second clock signal having a second period, comprising:a phase monitor generating an index signal according to a phase relationship between said first and said second clock signals; a first waveform sample table storing therein a first set of waveform samples, and enabled by said first clock signal to sequentially output said first set of waveform samples in response to a series of triggering of said second clock signal; a second waveform sample table storing therein a second set of waveform samples, and enabled by said first clock signal to sequentially output said second set of waveform samples in response to a series of triggering of said second clock signal, wherein said second set of waveform samples has a delay time less than said second period from said first set of waveform samples; a multiplexer electrically connected to said phase monitor, and said first and second waveform sample tables for permitting one of said first and second sets of waveform samples to be outputted in response to said index signal; and a digital-to-analog circuit electrically connected to said multiplexer for converting said waveform samples outputted through said multiplexer into an analog signal.