Electronics devices

Voltage Fallower Op-Amp as Voltage Fallower A circuit in which the output fallows the input voltage is called voltage fallower circuit The voltage fallower circuit using op-amp The node B is at potential Vin Now node A is also at the same potential as B i.e according to the same concept of virtual ground Va = Vb =Vin Now node A is directly connected to the ootput. Hence we can write, Vo = Va Vo = Vin For this circuit, the voltage gain is unity. Thus the output voltage Vo is equal to the input voltage Vin. If Vin increses, Vo also increases. If Vin decreases also Vo decreases. Thus output fallowes the input hence the circuit is called voltage fallower circuit. It also called source fallower, unity gain amplifier, buffer amplifier or isolation amplifier the input and output waveforms