公开(公告)号：US11086342B1

公开(公告)日：2021-08-10

申请号：US17020121

申请日：2020-09-14

Applicant: QUALCOMM Incorporated

Inventor： Jong Jin Kim ,  Raymond Rosik ,  Michael Naone Farias ,  Brett Walker

IPC: G11C5/14 ,  G05F1/46 ,  H03K5/24 ,  H03K19/20

Abstract: Techniques and apparatus for selecting a maximum input supply voltage from multiple input power supplies. An example maximum input supply selection circuit includes a parallel array of comparators and selection logic to select the maximum input supply voltage, supply present detectors, comparator settling logic including a warm-up delay timer to provide for comparator settling, and comparator enable logic for disabling all comparators and entering an ultra-low power mode.