Apparatus and method for drive controlling micro machine device

Details Apparatus and method for drive controlling micro machine device Apparatus and method for drive controlling micro machine device

2011-03-08

2011-03-08

Jackson, Stephen W (Department: 2836)

Electricity: electrical systems and devices

Electrostatic capacitors

Variable

C361S300000, C324S548000

Reexamination Certificate

active

07903386

ABSTRACT:
In a method for drive controlling a micro machine device including two electrodes opposing each other and a dielectric layer sandwiched therebetween, a control voltage in a rectangular waveform in which positive and negative polarities are alternately inverted is applied between the two electrodes. A current passing through the micro machine device due to the application of the control voltage are detected with respect to positive and negative sides, and parameters related to a capacitance of the micro machine device are acquired with respect to the positive and negative sides on the basis of the detected current. The control voltage is controlled so that the parameters acquired with respect to the positive and negative sides accord with each other. Thus, variation of the capacitance between the positive side and the negative side can be suppressed in switching drive of a variable capacitance device.

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