Input Impedance Of Op Amp Circuit. A voltage follower gain 1. When the configuration is non inverting input impedance of the circuit is high impedance and for impedance matching i may use a resistor with parallel to opamp vin.
A voltage follower gain 1. R1 in parallel with the resistor r2. Basic non inverting operational amplifier circuit.
When the configuration is non inverting input impedance of the circuit is high impedance and for impedance matching i may use a resistor with parallel to opamp vin.
Since the output adjusts to make the inputs the same voltage vout vin i e. The differential input impedance zdiff is the impedance between the two inputs. It is this circuit that is used when requiring very high levels of input impedance. For example i use the configuration below for 50ohm input impedance matching.
