At 12:25 PM 2/27/02 -0500, you wrote:
> > There are many ways to measure AC voltages. The most common is RMS
>
>What are other methods besides RMS?

Average is the most common in inexpensive multimeters, just it's jigged
a bit (about 11%) to make it read the same as RMS, if the input is
sinusoidal. You can also specify p-p, peak, average, and probably
others. It's just the average of the absolute value of the input signal,
and you already have your precision rectifier in place.

Measuring average is nicer than trying to measure the peak because you
automatically filter any spikes on the line, and the averaging can be done
with an RC low-pass filter if response time isn't critical.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com
9/11 United we Stand

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