Method for operating an ultrasonic frequency generator

Details Method for operating an ultrasonic frequency generator Method for operating an ultrasonic frequency generator

1986-09-24

1987-08-25

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

2391022, H01L 4108, B05B 314

Patent

active

046895159

ABSTRACT:
In an ultrasonic frequency generating assembly including a frequency generator coupled to a transducer through an output stage, a current measuring circuit is coupled to the output stage for sampling the current therethrough during each frequency burst upon the passage of a predetermined time interval following the onset of the respective frequency burst. The current value measured during a frequency burst is compared with a measured current value from an immediately preceding burst, the frequency output of the frequency generator being modified in accordance with the results of the comparison. The compared current values are stored in respective memories, the most recently measured current value being transferred from one memory to the other upon the termination of the comparison. A new current value is then loaded into the first memory.

REFERENCES:
patent: 3842340 (1974-10-01), Brandquist
patent: 3889166 (1975-06-01), Scurlock
patent: 4175242 (1979-11-01), Kleinschmidt
patent: 4264837 (1981-04-01), Gaboriaud
patent: 4275363 (1981-06-01), Mishiro et al.

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