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Analog Signal Division

Shihab
Expert 1205 points
Other Parts Discussed in Thread: MPY634

Hi,

I have two sine wave signals A and B whose amplitude can change from +10mV to +200mV. I need to design an analog circuit which do (A-B)/(A+B). Can we get an IC based solution for this or I need to do it as exp[log(A-B) - log(A+B)]?

Regards,

Shihab.

  • 0
    TI__Guru**** 152966 points

    Hello Shihab,

    I'm sure you can figure out how to add with an op-amp. To divide which far more complex, I suggest the MPY634.

    Figure 4 in the MPY634 data sheet shows the divider configuration. Since the MPY634 has differential inputs, it can also take care of (A-B) too.

     

    Regards,
    Ron M.