公开(公告)号：US20210232165A1

公开(公告)日：2021-07-29

申请号：US17140754

申请日：2021-01-04

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： John B. BOWLERWELL ,  Andrew J. HOWLETT ,  Graeme S. ANGUS ,  Andrei DUMITRIU

IPC: G05F1/563 ,  H04R3/00 ,  G05F1/62 ,  G05F1/575 ,  H03K17/00

Abstract: The present disclosure relates to circuitry for selecting a bias voltage to output at a bias voltage output node of the circuitry. The circuitry comprises a first circuit node configured to receive a first voltage from a first, unregulated, voltage source and a second circuit node configured to receive a second voltage from a second, regulated, voltage source. A switch arrangement configured to selectively couple the bias voltage output node to the first circuit node or the second circuit node is also provided.