Patent ID: 7633626

Claim:
A method for circumventing a deadband in signals output from a fiber optic gyroscope, comprising the steps of: providing a fiber optic gyroscope loop that includes signal-processing apparatus connected between an input and an output of the fiber optic gyroscope; injecting a dither signal into the signal processing apparatus so that the dither signal is added to signals output from the fiber optic gyroscope; combining the sum of the dither signal and the signals output from the fiber optic gyroscope to produce a gyro output plus dither signal; dividing the gyro output plus dither signal into a first portion that is input to the fiber optic gyroscope and a second portion; injecting the dither signal into a dither loop that is arranged to provide a filtered dither signal that is filtered in the same manner that the fiber optic gyroscope loop filters the dither signal input thereto; and inputting the second portion of the gyro output plus dither signal output from the fiber optic gyroscope and the filtered dither signal output from the dither loop into a differencing apparatus to provide a gyro signal output that includes no dither signal.