Patent ID: 6809851
Filing Date: 2004-10-26
Classification: G02B

Abstract:
A method for operating a circuit adapted to electrostatically drive the MEMS structure, the method comprising:applying a first voltage to a drive electrode that electrostatically drives the MEMS structure; generating a first current in response to a first digital control word; integrating the first current to generate a first difference voltage by which the first voltage is changed thereby to generate a second voltage, said first digital control word specifying whether said first difference voltage is greater than, smaller than or equal to 0 volts; applying the second voltage to the drive electrode that electrostatically drives the MEMS structure; generating a second current in response to a second digital control word; integrating the second current to generate a second difference voltage by which the second voltage is changed thereby to generate a third voltage, said second digital control word specifying whether said second difference voltage is greater than, smaller than or equal to 0 volts; applying the third voltage to the drive electrode that electrostatically drives MEMS, structure, wherein the first voltage is different from the second voltage.