Patent ID: 6484577
Filing Date: 2002-11-26
Classification: G01P,G11B

Abstract:
An accelerometer signal processor for use in processing sensor signals generated by an accelerometer, the accelerometer comprises a sensor for generating A, B, C and D sensor signals in response to a sensor excitation, the accelerometer signal processor comprising:(a) an A variable oscillator (VO) for generating an A oscillating signal in response to the A sensor signal; (b) a B VO for generating a B oscillating signal in response to the B sensor signal; (c) a C VO for generating a C oscillating signal in response to the C sensor signal; (d) a D VO for generating a D oscillating signal in response to the D sensor signal; (e) a first axis counter comprising an up count input responsive to the A oscillating signal and a down count input responsive to the D oscillating signal, the first axis counter for generating on output signal indicative of an acceleration along a first axis; (f) a second axis counter comprising an up count input responsive to the B oscillating signal and a down count input responsive to the C oscillating signal, the second axis counter for generating on output signal indicative of an acceleration along a second axis; and (g) a rotation counter comprising an up count input responsive to the A and D oscillating signals and a down count input responsive to the B and C oscillating signals, the rotation counter for generating an output signal indicative of a rotational acceleration.