公开(公告)号：US20160079987A1

公开(公告)日：2016-03-17

申请号：US14483415

申请日：2014-09-11

Applicant: EchoStar Technologies L.L.C.

Inventor： Santharam Gurumani ,  Bala Subramaniam

IPC: H03L7/00

CPC classification number: H03L7/00 ,  G06F1/022 ,  G06F1/08 ,  H03L7/0994

Abstract: A numerically controlled oscillator includes a phase accumulator that outputs a phase word and a clock that periodically outputs a clock signal in accordance with a delay interval. The phase accumulator outputs a new phase word in response to receiving the clock signal. A clock controller calculates a timing drift and adjusts the delay interval to reduce the timing drift. A method includes receiving a plurality of frequency control words, calculating a delay interval, accumulating the frequency control words in accordance with the delay interval to generate a phase word, converting the phase word to a waveform, calculating a timing drift, and adjusting the delay interval to reduce the timing drift.

Abstract translation: 数控振荡器包括相位累加器，其输出相位字和根据延迟间隔周期性地输出时钟信号的时钟。 响应于接收时钟信号，相位累加器输出新的相位字。 时钟控制器计算定时漂移并调整延迟间隔以减少定时漂移。 一种方法包括接收多个频率控制字，计算延迟间隔，根据延迟间隔累积频率控制字以产生相位字，将相位字转换为波形，计算定时漂移以及调整延迟 间隔来减少时序漂移。