Patent ID: 8884710

Claim:
A gyroscope system comprising: a MEMS gyroscope including a drive-sense terminal and a sense terminal; a drive amplifier being coupled to the drive-sense terminal; a sense amplifier being coupled to the sense terminal; a demodulator including a signal input and a clock input; a phase-locked loop (PLL); a phase shifter; and a first frequency divider; wherein, the output of the PLL is coupled to the phase shifter; the output of the phase shifter is coupled to the second frequency divider; the frequency divider is coupled to the clock input; the phase shifter is programmable to select the number of clock-cycle delays relating its input and output; the first frequency divider is operable to divide the frequency of the phase shifter output down to the drive frequency; wherein, the output of the drive amplifier is coupled to an input of the phase-locked loop; an output of the sense amplifier is coupled to the signal input; the MEMS gyroscope is operable to produce a signal at a drive frequency; the demodulator is operable to demodulate a signal from the MEMS gyroscope; the phase-locked loop is operable to suppress a phase error of the phase-locked loop input.