公开(公告)号：US10862488B2

公开(公告)日：2020-12-08

申请号：US16232911

申请日：2018-12-26

Applicant: Texas Instruments Incorporated

Inventor： Marius Moe ,  Tarjei Aaberge

IPC: H03L7/085 ,  H03L7/081 ,  H03K5/14 ,  H03K3/03 ,  H03K5/00 ,  G04F10/00

Abstract: In described examples, an electronic circuit for determining a phase difference between a first clock signal and a second clock signal includes a timer circuit, circuitry for generating a selectively delayed transition of the second clock signal, and phase determination circuitry. The timer circuit produces an elapsed time between a transition of the first clock signal and the selectively delayed transition of the second clock signal. The circuitry for generating the selectively delayed transition of the second clock signal generates the selectively delayed transition in response to a random selection of a respective output from a plurality of second clock signal delay stages. The phase determination circuitry provides the phase difference in response to the elapsed time and the random selection of a respective output from a plurality of second clock signal delay stages.