Switching method using a frequency domain piezoelectric switch

Details Switching method using a frequency domain piezoelectric switch Switching method using a frequency domain piezoelectric switch

1998-04-06

2000-05-09

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310311, 310319, 310331, H01L 4108

Patent

active

06060817&

ABSTRACT:
A frequency domain switch (100) utilizes an array of cantilevered beams (108) laminated with a piezoelectric material (126). Each of the beams has a unique geometry, and produces a sinusoidal electrical signal in the piezoelectric film that is assignable only to one of the cantilevered beams. When a free end of one of the cantilevered beams is deflected, it produces a signal that is analyzed by suitable circuitry (410-440) to read the position of the switch.

REFERENCES:
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patent: 4742263 (1988-05-01), Harnden et al.
patent: 4853580 (1989-08-01), Sula
patent: 5034648 (1991-07-01), Gastgeb
patent: 5406682 (1995-04-01), Zimnicki et al.
patent: 5977690 (1999-11-01), Ellis et al.

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