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This paper reports a comparative study between double side-band (DSB) and single side-band (SSB) demodulation methods when applied to a general control system of MEMS gyroscopes. Theoretical analysis originally reveals the influence of phase delay variations of C/V sensing circuit in the drive loop on gyroscope output. A simulation is set up to evaluate the two demodulation algorithms, demonstrating...
This paper explores the influence of the phase delay resulting from the signal processing circuitry on the IQ coupling characteristics in MEMS vibratory gyroscopes. In the conventional method, the phase delay appears as a phase error in the phase-locked loop (PLL) of the drive-mode oscillation control. A detailed theoretical analysis derives an analytical equation of the IQ coupling about the phase...
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