TIDUEU6B September 2020 – December 2021 OPA810
The fundamental concept of this design is the conversion of current through ZX into a voltage using an amplification factor of RF. The output of amplifier A2 is given in Equation 1
In this method, multiple values of RF can be used for multiple ranges of impedance, as shown in Figure 2-6. This approach of using multiple RF values improves the accuracy.