Two Golden Rules of Op-Amps Ro 1.The input impedance is infinite.(Rin=infinity); 2.The output impedance is e。 zero.(R。=zero) K(e2-e) 0 3.K:infinite. The input impedance of Op-Amps is so high that the Op-Amp literally draws no current into or out of the input terminals.1. The input impedance is infinite. ( Rin= infinity); 2. The output impedance is zero. ( R o= zero); 3. K:infinite. a b - + 2 e 1 e + - ( ) 2 1 K e  e Rin R o o e Two Golden Rules of Op-Amps • The input impedance of Op-Amps is so high that the Op-Amp literally draws no current into or out of the input terminals