Ultrasonic driving device with current limiting protection

Details Ultrasonic driving device with current limiting protection Ultrasonic driving device with current limiting protection

2008-05-06

2008-05-06

Dougherty, Thomas M. (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

Reexamination Certificate

active

11549252

ABSTRACT:
An ultrasonic driving device includes a protection module that receives a first drive signal from a signal generating module, detects an operating current of an output module, and provides the first drive signal to the output module when the detected operating current is smaller than a threshold current value. The output module adjusts the first drive signal received from the protection module to result in a second drive signal. The protection module stops providing the first drive signal to the output module such that the output module ceases to generate the second drive signal when the detected operating current is not smaller than the threshold current value. An ultrasonic transducer is connected to the output module so as to receive the second drive signal therefrom and so as to output ultrasounds, the frequency of which corresponds to that of the second drive signal.

REFERENCES:
patent: 3085185 (1963-04-01), Jacke et al.
patent: 5109174 (1992-04-01), Shewell
patent: 6630768 (2003-10-01), Yamashiro et al.
patent: 2004113846 (2004-04-01), None
patent: 20020035392 (2002-05-01), None
patent: WO/2006/074803 (2006-07-01), None

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