Patent ID: 6104100
Filing Date: 2000-08-15
Classification: B60R,G01G,G01L

Abstract:
A charge transfer load sensor, comprising:an input port arranged to provide an input voltage;a first electrode coupled to the input port;a second electrode disposed a fixed distance from the first electrode and switchably coupled to the first electrode;a third electrode, arranged to couple to ground and movably disposed between the first and second electrodes, the third electrode movably responsive to a force;a switch arrangement arranged to apply a predetermined voltage level to the first electrode and couple the second electrode to ground during a first predetermined timing interval, and couple the first electrode to the second electrode during a second predetermined timing interval, whereby a first capacitor is formed between the first electrode and the third electrode, and a second capacitor is formed between the second electrode and the third electrode; andan output port coupled to the second electrode and arranged to provide an output voltage.