The main objective of this research is to enhance the DC open loop gain and voltage swing of a Telescopic CMOS op amp by using OrCAD PSPICE design and simulation software, based on electronic devices and advanced integrated circuit design fundamentals. The Telescopic CMOS op amp circuit proposed and designed in this research has achieved increased DC open loop gain of 77.777dB and high out put voltage swing of 7mV . For a single stage CMOS op amp, these results highly increased values which can be applied in many devices to amplify very small voltages without any signal distortion.