Patent ID: 6880257
Filing Date: 2005-04-19
Classification: G01C

Abstract:
1. A signal sampling circuit, suitable in a tilt sensor, wherein the tilt sensor comprises an output pin, at least a pair of a first input pin and a second input pin set symmetrically in each side of the output pin, and electrolyte electrically conductive between the first input pin and the output pin and between the second input pin and the output pin, the signal sampling circuit comprising: a signal-generating module regularly generating a plurality of level-measuring signals with equal intervals, and alternately and multi-directionally sending the level-measuring signals to the first input pin and the second input pin of the tilt sensor in turn, respectively, therefore, the output pin of the tilt sensor outputs a first output signal and a second output signal in order corresponding to the level-measuring signals; a sample and hold module sampling and holding the first output signal and the second output signal in turn, and outputting a first holding signal and a second holding signal, respectively; and a differential module receiving and differentiating the first holding signal and the second holding signal, outputting a level-estimating-result signal, and sending the level-estimating-result signal to a micro controller unit to derive the tilt information of one direction.