Patent ID: 6621279
Filing Date: 2003-09-16
Classification: G01C

Abstract:
A method for nulling error in the output of a sensor caused by feedthrough of one or more drive signals into said sensor output, said sensor including first and second drive electrodes which impart vibratory motion to first and second members in response to said drive signals, said sensor further including one or more sensing electrodes for sensing said vibratory motion and for generating output signals proportional to the amplitude of said vibratory motion, the method comprising the steps of:(a) measuring a mismatch between a first capacitance and a second capacitance, wherein said first capacitance is defined between said first drive electrode and said first member, and wherein said second capacitance is defined between said second drive electrode and said second member; and (b) compensating for said capacitance mismatch by preventing the feedthrough of said drive signals into said output, thereby nulling said sensor output error.