Patent ID: 11973503

Abstract:
An application specific integrated circuit (ASIC) chip is provided. Stress in various directions can be measured by disposing symmetrical “four-corner+middle” delay chain combinations in three dimensions inside the ASIC chip. Two sensors using the ASIC chip are further provided. In one sensor, a micro-electromechanical system (MEMS) chip is stacked with the ASIC chip. In the other sensor, the MEMS chip and the ASIC chip are symmetrically arranged. After being stacked and symmetrically arranged, the MEMS chip and the ASIC chip have highly consistent stress concentration characteristics, which can calibrate stress in various directions and effectively improve accuracy and temperature stability of the MEMS chip. In addition, an electric toothbrush using the ASIC chip is further provided, which can effectively improve consistency, stability, reliability, sensitivity, and linearity of stress detection, and can more accurately compensate for a temperature drift.