Dear Sir, I had a small query which i thought i would ask you. can you please tell me if there are IC's which can read and measure AC signal, convert it to DC,trace the 2nd and the 5th harmonic component in an AC wave of fundamental frequency of 50Hz. if yes can they be interfaced with a microcntroller. If not then please tell me if there are any alternatives.I also want to know more about True RMS IC's. So waiting for your reply.
Thanking You
Regards Pavan
"pavan"
** No.
......... Phil
There aren't any ICs that will do that, unless you make one.
Here's the bible of RMS-to-DC Conversion:
Now you might want to look at filtering out the harmonics before converting to DC.
| .--------------. .----------------------. | Signal | | | RMS-to-DC Converter | | | 100Hz | | or | to uC | o---o----o Filter o----o Op Amp Precision o---o | | | | | Rectifier/Filter | | | '--------------' '----------------------' | | | | .--------------. .----------------------. | | | | | RMS-to-DC Converter | | | | 250Hz | | or | to uC | '----o Filter o----o Op Amp Precision o---o | | | | Rectifier/Filter | | '--------------' '----------------------' (created by AACircuit v1.28.5 beta 02/06/05
But if you're only measuring specific harmonics, why would you need an RMS-to-DC converter? They're exotic and expensive. If all you need is the amplitude of one harmonic (sine wave), wouldn't an op amp precision rectifier do just as well?
You so might want to describe what you're trying to do here, and clarify the above a little bit.
Good luck Chris
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