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

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

2011-03-01

2011-03-01

Williams, Hezron (Department: 2856)

Measuring and testing

Vibration

Resonance, frequency, or amplitude study

C073S866100, C331S109000, C331S154000, C331S160000

Reexamination Certificate

active

07895894

ABSTRACT:
A driver device includes a gain control amplifier that causes a vibrator to produce driving vibrations by controlling an oscillation amplitude in an oscillation loop, a signal generation circuit that generates a signal having a given frequency, and a modulation circuit that modulates the frequency of the signal generated by the signal generation circuit to a resonance frequency of the vibrator. The driver device causes the vibrator to produce the driving vibrations using the signal modulated by the modulation circuit, and then causes the vibrator to produce the driving vibrations by controlling the oscillation amplitude in the oscillation loop formed by the vibrator and the gain control amplifier.

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patent: A-2003-240556 (2003-08-01), None
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