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The set of data points, Vout = 0 V @ Vin = -20 mV, Vout = 3 V @ Vin = +20 mV, see the transfer curve below.

Transfer Curve

 

 0 = m(-0.02) + b                                

 3 = m(0.02) + b                                

 

After algebraic manipulation, yield the solution, m = 75 and b = 1.5, rewrite m and b to new equation.

 

 Vout = 75Vin + 1.5                        

 

The equation above similar to  the CASE1: Vout = +mVin + b circuit.

 

 

We can calculate the value of R1, R2, RF and RG by the following equations:

 

 

The circuit configuration which yields a solution is shown below.

Circuit Diagram

 

 

Configuration of aMG SIGCON-A: Soldering to Jump J4, J2, and X3. Place 10 kΩ resistor to X2 and X10, 1.5 MΩ to X4 and 680 kΩ to X8 .

 

 

Demo

Input VS Output Signal