In this paper, a novel operational amplifier is demonstrated which is established on the folded cascode Op-amp structure. A new technique of positive feedback is proposed to increase the open loop gain of Op-amp while not limiting its linearity. The proposed structure is simulated by HSPICE software using level 49 parameters (BSIM3V3) in a typical 0.18 A mu m CMOS technology. HSPICE simulation verifies the theoretical estimated improvements.