Hi mates.
Albert's here. I'm new here and i'm seeking your helps regarding the following.
I'm working on a project which involves the arithmetic operations (+,
-, X, /) on voltages. Using ADC conversion is not applicable in my case. The project is to capture 4 voltages from 4 testpoints from a PCBA, ie A, B, C and D. After capturing the 4 voltages, we need to do the following calculations:
Result = ((A+B)-(C+D))/(A+B+C+D)
For the addition and subtraction parts, i've got the idea of using summing amplifier and inverting amplifier to perform the functions. If you have other suggestion, kindly share with me. Fyi, the voltage values are about 0.3V.
For the multiplying & division's parts, please give suggestion for the circuit. Thanks and hope to get your response soon.
Cheers, Albert Leng