NOTE: CMOSst.cir file with sky130 modification is present inside the skywater-pdk-libs-sky130_fd_pr-main folder .


Initial Stage:
1. Download eSim from the website and install.
2. Download skywater-sky 130-pdk and ngspice if needed
3. Study the circuit diagram carefully before designing 
4. Watch reference vedios and tutorials and research on the mentioned above 

Intermediate Stage

1. Create your project and Design your circuit 
2. Label and annotate and then generate netlist
3. Make sure your folder must be present where sky-130 is present (same folders else put proper path)
4. then open .cir fie in notepad and do required modification using sky-130.

Final Stage 

1. Open your ngspice.exe type in the terminal of ngspice.exe cd <path of your .cir file>
2. Then enter your file name.cir and press enter
3. Wait for the waveforms to be generated. 

Problems faced: proper sky-130 to be downloaded 
                label and name all components before annotation
                modifying using sky-130 should be properly done seeing all ports and thier value in order

Parameters:
1. vdd 1.5v [ acts as threshold voltage ]
2. vin  pulse(0 1.5 0.7us 0.7us 0.7us 5us 10us) [initial pulse selay rise fall width period]
3. vout [output is obtained]
                 