For the purposes of running experiments, I have the need to apply a high
voltage 40KHz wave to an ultrasonic transducer.  The waveform could be
sine or square (will both drive the ultrasonic)?  My next challenge is
to measure in real time the total power consumed by the transducer in
real use.  I assume I must measure volts, amps, and multiply (taking
phase into account).  Ultimately, I want to convert to Joules (1J= 1W *
1S).  I would very much like to get 12 bit or better final results.

I could sample and do math (but 80+KHz sounds like a monster), or I
could use one of those power meter watt calculation chips, say from
Analog Devices.  I do not care which way, as long as I get the highest
precision one could ask within reason.

Any old ultrasonic hands out there??

Thanks
Chris~

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