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Op-amp as an amplifier with positive feedback

Question asked by manish_india on May 8, 2014
Latest reply on May 9, 2014 by harryh

I made a circuit using Op-amp 741 with positive feedback. R1 (1K) between pin 3 to ground and Rf (1) between pin no.3 and pin no. 6. Now i am applying input at pin no. 2. While doing simulation in in ORCAD (PSPICE) when I am giving dc input of 100mV, output is 200mV. AC analysis also shows gain is 2. While applying 100mV sin wave input output is saturated(which is correct accorcding to me).

Can some one tell me why I am getting two different results?