公开(公告)号：US20230146711A1

公开(公告)日：2023-05-11

申请号：US17983463

申请日：2022-11-09

Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

Inventor： Yimai PENG ,  David BLAAUW ,  Dennis SYLVESTER ,  David Kyojin CHOO

IPC: G01P15/125 ,  H02M3/07

CPC classification number: G01P15/125 ,  H02M3/07 ,  G01P2015/0862

Abstract: A motion sensing system uses high-voltage biasing to achieve high resolution with ultra-low power. The motion sensing system consists of a motion sensor, a readout circuit, and a high-voltage bias circuit to generate the optimized bias voltage for the motion sensor. By using the high-voltage bias, the signal from the motion sensor is raised above the readout circuit's noise floor, eliminating the power-hungry amplifier and signal-chopping used in conventional motion sensing systems. The bias circuit, while producing the programmable bias voltages for the motion sensor, also compensates for the process mismatch raised by the high voltage biases.