I just only make model for RMS-to-DC converter based on http://www.analog.com/media/en/technical-documentation/application-notes/AN-212.pdf .I have tested, i think, that schematic is correct, but output always 0 V. Whats the problem ?

I just only make model for RMS-to-DC converter based on http://www.analog.com/media/en/technical-documentation/application-notes/AN-212.pdf .I have tested, i think, that schematic is correct, but output always 0 V. Whats the problem ?

Hi,

I did some testing before with this model base on AN216 VCA circuit and everything works fine. I can't set up the circuit right now since I need to update my Multisim so please kindly do me a favor. Can you provide the netlist you currently using ( what version?) Did you downloaded it from our ADI website? Have you tried to simulate the cicuit by blocks and try to isolate the error? which one provide the correct and expected response and which one does not?

I'll get back to you as soon as possible.

Thanks,

Phil

I use Multisim 14.0. Model for ad834 was taken from multisim library. The only one thing i have done is some tests with builted model. As i understood is that ad834 is used to make a multiplication { (X-0)*(X-0)=X^2) , capacitors and resistors are used to take integral (in other words get the average) and than takes root. The model for sine wave +1 V should have on the out ~0.71 V

I use Multisim 14.0. Model for ad834 was taken from multisim library. The only one thing i have done is some tests with builted model. As i understood is that ad834 is used to make a multiplication { (X-0)*(X-0)=X^2) , capacitors and resistors are used to take integral (in other words get the average) and than takes root. The model for sine wave +1 V should have on the out ~0.71 V