Alternate constant current or voltage generator for an ultrasoni

Details Alternate constant current or voltage generator for an ultrasoni Alternate constant current or voltage generator for an ultrasoni

1978-05-16

1979-05-22

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H01L 4110

Patent

active

041561570

ABSTRACT:
This ultrasonic generator comprises a transducer supplied by an oscillator via a transformer. The oscillator is supplied in parallel by a constant current generator and a voltage generator. Means are also provided to block the voltage generator as long as the impedance of the load remains lower than an adjustable threshold, so that the supply functions as constant current generator and, on the contrary, to block the current generator as soon as the impedance of the load exceeds the adjustable threshold, so that the supply then functions as voltage generator and limits the output power.

REFERENCES:
patent: 3443130 (1969-05-01), Shoh
patent: 3526792 (1970-09-01), Shoh
patent: 3586936 (1971-06-01), McLeroy
patent: 3668486 (1972-06-01), Silver

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