Patent ID: 6082196
Filing Date: 2000-07-04
Classification: G01P

Abstract:
A physical quantity detecting device comprising:a movable electrode displaceable in response to a predetermined physical quantity;first and second fixed electrodes disposed in opposing relationship with said movable electrode interposed therebetween to extend in a direction in which said movable electrode is displaced;a detecting element for outputting an output signal corresponding to the displacement of said movable electrode;first energizing means for alternately energizing said first and second fixed electrodes;duty control means for controlling, based on the output signal obtained from said detecting element, an energization ratio of said first fixed electrode to said second fixed electrode by said first energizing means so that said movable electrode is placed in position;second energizing means for simultaneously energizing and deenergizing said first and second fixed electrodes; andswitching means for selectively activating said first energizing means and said second energizing means at a predetermined ratio.