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US 2015/0020589 A1Published application
Apparatus for driving gyro sensor and control method thereof
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsSung Tae Kim, Young Kil Choi, Jun Kyung Na, Seung Chul Pyo, Chang Hyun Kim
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Abstract
Disclosed herein is an apparatus for driving a gym 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.
Claims17
An apparatus for driving a gym sensor, the apparatus comprising:
- a driving displacement signal processing unit configured to receive first and second driving displacement signals from a gym 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.
1 more element
A control method of an apparatus for driving a gym sensor, the method comprising:
- receiving first and second displacement signals from a gym sensor and generating first and second clock signals by using the driving displacement signals;
- receiving first and second sensing signals from the gyro sensor and mixing the first and second sensing signals with the first and second driving displacement signals by using a variable resistor to generate third and fourth sensing signals;
- determining whether a quadrature signal exists in the third and fourth sensing signals, and when the quadrature signal exists, comparing the quadrature signal with a pre-set target value, and controlling the variable resistance value through digital correction;
- and
- detecting first and second gyro signals from the third and fourth sensing signals.
2 more elements
Dependencies are inferred from the claim text.