Non-inverting amplifier

The type of amplifier that is designed to amplify the input signal without changing its phase is called a non-inverting amplifier the gain of the amplifier is always positive. Hence the voltage gain of the circuit Av can be taken as: Av=1+R2R1 Where: Av = voltage gain of op amp circuit R2 = feedback resistor resistance in Ω R1 = resistance of resistor to ground in Ω