Self-oscillation circuit having means for eliminating quadrature error and method for eliminating quadrature error using the circuit
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United States of America Patent
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Jul 7, 2015
Grant Date -
Oct 16, 2014
app pub date -
Oct 9, 2013
filing date -
Apr 12, 2013
priority date (Note) -
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Abstract
Disclosed herein are a self-oscillation circuit having a means for eliminating a quadrature error and a method for eliminating a quadrature error using the circuit. The self-oscillation circuit having a means for eliminating a quadrature error according to an exemplary embodiment of the present invention includes: a voltage converter converting a current signal from the gyroscope sensor into a voltage signal, a signal magnitude detector measuring a magnitude of a quadrature error signal included in an output signal from the voltage converter, and a quadrature error eliminator generating a signal which has the same phase as the output signal from the voltage converter and the same magnitude as a signal measured by the signal magnitude detector, based on an output signal from the signal magnitude detector and the output signal from the voltage converter.
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