公开(公告)号：US10574246B2

公开(公告)日：2020-02-25

申请号：US15949294

申请日：2018-04-10

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sarma Sundareswara Gunturi ,  Sundarrajan Rangachari ,  Aswath Vs ,  Raunak Dhaniwala

IPC: H03L7/24 ,  H03K21/38 ,  H03L7/02

Abstract: A digital local oscillator includes a look-up table and oscillator control circuitry. The look-up table contains samples of the digital local oscillator signal. The oscillator control circuitry is configured to select samples from the look-up table based on an accumulated phase value. The oscillator control circuitry is also configured to add a correction value to the accumulated phase value based on a difference of a frequency of the digital local oscillator signal and a desired frequency.