公开(公告)号：US11047890B2

公开(公告)日：2021-06-29

申请号：US16121259

申请日：2018-09-04

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： Gautham S. Sivasankar ,  Tejasvi Das ,  Emmanuel Marchais ,  Amar Vellanki ,  Leyi Yin ,  John L. Melanson ,  Venugopal Choukinishi

IPC: G01R25/00 ,  H03D13/00 ,  H03F3/183 ,  H03G3/30 ,  H04R3/00 ,  H03G3/00 ,  G01R19/25 ,  G01R21/133 ,  G01R29/18 ,  G01R31/317 ,  G01R31/30 ,  G01R19/04

Abstract: A method of determining a phase misalignment between a first signal generated from a first signal path and a second signal generated from a second signal path may include obtaining multiple samples of the first signal proximate to when the first signal crosses zero wherein the first signal can be approximated as linear; obtaining multiple samples of the second signal proximate to when the second signal crosses zero wherein the first signal can be approximated as linear; based on the multiple samples of the first signal, approximating a first time at which the first signal crosses zero; based on the multiple samples of the second signal, approximating a second time at which the second signal crosses zero; and determining the phase misalignment between the first signal and the second signal based on a difference between the first time and the second time.