Patent ID: 7023368
Filing Date: 2006-04-04
Classification: G06F,H03M

Abstract:
1. A direct-digital-frequency synthesizer adapted to receive a frequency code and adapted to output an analog current, the direct-digital-frequency synthesizer comprising: a first latch adapted to receive the frequency code; an accumulator adapted to receive the latched frequency code and a previously accumulated digital word and adapted to output a currently accumulated digital word, wherein the currently accumulated digital word upon output replaces the previously accumulated digital word for a next cycle; a waveform determiner adapted to receive the currently accumulated digital word and output a digital data input; a first clock signal distribution module adapted to transmit a first clock signal to the accumulator and a second clock signal to a digital-to-analog converter (DAC); and the digital-to-analog converter (DAC) adapted to receive the digital input data and the second clock signal and adapted to output an analog current, the DAC comprising: