The only easy ways to divide two multimeter readouts without using a calculator is to use either a slide rule or pencil and paper! Note that no voltages are involved here, only numbers. Now if you want to deal with voltages then you do NOT want to divide multimeter readings, you apparently want to produce a ratio of two voltages. The part you selected, AD532, will divide 2 voltages but only if the voltage used for the denominator is a non-zero positive value. So the denominator ("X") cannot be an AC voltage. It can be a DC representation of the amplitude of the AC voltage, just like what you get from reading a multimeter, and must exceed some minimum voltage or else the chip will fail to produce a correct result due to saturation (aka clipping). The numerator input ("Z") can be AC but then the result would be an AC signal at the same frequency, just scaled in amplitude. Note that this result is a voltage, NOT a number representing that voltage like you would get from a meter.

 

I believe we do not understand what you are trying to do.
Why is the DMM set to AC?
Why are you using a DMM?

 

If you run each AC input through an RMC/DC converter, you now have two voltages that track the true RMS values of the inputs (with some time lag set by the filtering). An analog divider can divide these. Now you have a DC value that represents the result of the division. Use it to control a variable-gain amplifier fed by either of the inputs. Now you have an output sinewave that absolutely tracks the frequency and phase of one of the inputs, with an amplitude that reflects the division.

ak

 

I believe we do not understand what you are trying to do.
Why is the DMM set to AC?
Why are you using a DMM?

He isn't. I think he is using the DMM as an example of what he wants the circuit to respond to - the RMS values of the two inputs.

ak

 

He isn't. I think he is using the DMM as an example of what he wants the circuit to respond to - the RMS values of the two inputs.

ak

That is what I am assuming. We need the TS to confirm this.

 

If you don't need true RMS (i.e. the signal is close to a true sinewave), then you can use an opamp precision rectifier circuit to generate the average value of the signals.