Non-inverting Amplifier

*A basic circuit with op-amp; *It uses negative feedback to increase the input impedance and reduce the output impedance; *The signal is received in non-inverting input; *This signal produces an output signal in phase with the input one; *A part of the output is used as feedback trhough the voltage divider; *The R1 voltage is applied in the inverting input; *The voltage in the inverting input is almost equal to the non-inverting one, controlling the output gain; *The voltage gain of the circuit is: Av = Rf/R1 + 1