Inertial force sensor and electronic device using same

摘要

An inertial force sensor includes the following elements: a sensor element for converting an inertial force into an electrical signal; a sensor signal processor connected to the sensor element, for outputting an inertial force value; and a power controller for controlling electric power supply to the sensor signal processor, based on the inertial force value. When the inertial force value is maintained for a predetermined time period within a predetermined range in which a reference value is the middle value of the range, the power controller reduces the electric power supply to the sensor signal processor and updates the reference value to the inertial force value obtained after a lapse of the predetermined time period.

主权项

1. An inertial force sensor comprising:
a sensor element configured to convert an inertial force into an electrical signal; a sensor signal processor connected to the sensor element and configured to receive the electrical signal and output an inertial force value; and a power controller configured to reduce an electric power supply to the sensor signal processor when the inertial force value is maintained for a predetermined range, and configured to update a middle value of the predetermined range when the inertial force value is maintained for a predetermined time period.