Adjustable compensation of a piezo drive amplifier depending...

Details Adjustable compensation of a piezo drive amplifier depending... Adjustable compensation of a piezo drive amplifier depending...

2007-05-15

2007-05-15

Schuberg, Darren (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S323010, C310S323130

Reexamination Certificate

active

10910222

ABSTRACT:
An integrated circuit (42) provides drive signals to a piezo element (48) of a milli-actuator device (20) in a mass data storage device (10). The integrated circuit (42) includes a circuit (61) for selectively operating the integrated circuit (42) in either a voltage or a charge mode of operation. A first amplifier circuit (44) can be compensated for a variable number of piezo elements in the charge mode of operation by adjustable output impedance adjusting elements (124, 126, 138-141) that are switchably connectable into the amplifier circuit (44).

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