Inertial force sensor with a correction unit

摘要

An inertial force sensor of the present invention includes a detection element, a detection circuit for detecting the amount of inertia corresponding to the inertial force applied to the detection element; a first low-pass filter connected to the output side of the detection circuit; and a correction circuit for correcting the output of the first low-pass filter. The correction circuit includes a correction amount generation unit connected to the output side of the first low-pass filter; a correction amount storage unit connected to the output side of the correction amount generation unit; and a correction unit connected to the output side of the first low-pass filter and to the output side of the correction amount storage unit. The correction unit corrects an output value of the first low-pass filter based on a correction amount stored in the correction amount storage unit.

主权项

1. An inertial force sensor comprising:
a detection element; a detection circuit for detecting an amount of inertia corresponding to an inertial force applied to the detection element; a first low-pass filter connected to an output side of the detection circuit; and a correction circuit for correcting an output of the first low-pass filter, wherein the correction circuit includes:
a correction amount generation unit connected to an output side of the first low-pass filter;a correction amount storage unit connected to an output side of the correction amount generation unit;
a correction unit connected to the output side of the first low-pass filter and to an output side of the correction amount storage unit; andan inertia amount determination unit for outputting an instruction signal, wherein the correction amount generation unit includes:
a data masking circuit masking an output value of the first low-pass filter;a high-pass filter connected to an output side of the data masking circuit; anda calculation circuit connected to the output side of the first low-pass filter and to an output side of the high-pass filter, the calculation circuit outputting a correction amount which is a difference between the output value of the first low-pass filter and an output value of the high-pass filter, wherein the correction amount storage unit stores the correction amount if the inertia amount determination unit outputs the instruction signal, and wherein the correction unit corrects an output value of the first low-pass filter based on a correction amount stored in the correction amount storage unit.