Two Stage Operational Amplifier
   Operational amplifier is consider to be the most imperative electronic device. The problem lies in design and implementation of two stage CMOS Opamp keeping various parameters into 
consideration which are constraints. the circuit consist of two satges. In this circuit i have used a differential amplifier in first stage and common source in secong stage. Instead 
of using current source i used a transistor M7. I gave a voltage source as vdd with 1.8V. Then we have two inputs for which i gave 1.5V. There are 2 capacitors in my design for which 
i gave values as 2pf,110pf and there is a resistor with 7kohms. After completion fo designing the circuit i annotated the schematic components ,then performed electrical rules check.
Then generated a netlist and used sky130lib and changed all the esim libraries to sky130 library. then gave the inputs for vin1 and vin2 and plotted for both transient and ac analysis.

    i faced problem while modifying the netlist to sky130 as i am new to the tool other than that everything was good and i got the good waveforms for both analysis. As i have two 
waveforms so the codes so i submitted ac analysis .cir file in .cir.out file extension and tha transient analysis .cir file in .zip file extension if you watch carefully you can 
understand the way i submitted the .cir files. thanks for this marathon, thanks for understanding my problem and sorry for inconviniece.