Apparatus for driving gyro sensor and control method thereof

摘要

Disclosed herein is an apparatus for driving a gyro sensor including a driving displacement signal processing unit, a sensing signal processing unit and an automatic quadrature signal controller configured to control the variable resistor through digital correction when a quadrature signal exists, and minimize an amplitude of the quadrature signal.

主权项

1. An apparatus for driving a gyro sensor, the apparatus comprising:
a driving displacement signal processing unit configured to receive first and second driving displacement signals from a gyro sensor, generate first and second clock signals by using the first and second driving displacement signals, and subsequently apply a driving signal generated by using the second clock signal to the gyro sensor; a sensing signal processing unit configured to receive first and second sensing signals from the gyro sensor, generate third and fourth sensing signals by mixing the first and second sensing signals and the first and second displacement signals by using a variable resistor such that a quadrature signal included in the first and second sensing signals is reduced, and detect a gyro signal from the third and fourth sensing signals; and an automatic quadrature signal controller configured to determine whether a quadrature signal exists in the third and fourth sensing signals, control the variable resistor through digital correction when a quadrature signal exists, and minimize an amplitude of the quadrature signal.