公开(公告)号：US10401886B1

公开(公告)日：2019-09-03

申请号：US14813549

申请日：2015-07-30

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Rahul Singh ,  Prashanth Drakshappalli ,  Dale Brummel

IPC: G05F1/565 ,  G05F1/46 ,  G05F1/56

Abstract: A system may include a first voltage reference for generating a first voltage for operating a circuit, a second voltage reference having a higher precision than the first voltage reference, and a controller. The controller may be configured to determine a presence or an absence of a condition for calibrating the first voltage reference. The controller may also be configured to, responsive to the presence of the condition, enable the second voltage reference to generate a second voltage for calibrating the first voltage reference. The controller may further be configured to, responsive to the absence of the condition, disable the second voltage reference.