Driver device, physical quantity measuring device, and...

Details Driver device, physical quantity measuring device, and... Driver device, physical quantity measuring device, and...

2007-11-26

2010-12-14

Larkin, Daniel S (Department: 2856)

Measuring and testing

Vibration

Resonance, frequency, or amplitude study

C073S866100, C331S109000, C331S154000, C331S160000

Reexamination Certificate

active

07849746

ABSTRACT:
A driver device that forms an oscillation loop with a vibrator and causes the vibrator to produce driving vibrations includes a current-voltage converter that is provided in the oscillation loop and converts a current that flows through the vibrator into a voltage, and a GCA as a comparator that is provided in the oscillation loop and outputs a signal corresponding to a comparison result between an output from the current-voltage converter and a given voltage. The GCA outputs a first high-level voltage or a low-level voltage during oscillation startup, and outputs a second high-level voltage or the low-level voltage in a steady oscillation state. The first high-level voltage is a voltage higher in potential than the second high-level voltage.

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