VLSI projects using esim software

eSim is a free/libre and open-source EDA tool for circuit design, simulation, analysis, and PCB design. It is an integrated tool built using free/libre and open-source software such as KiCad, Ngspice,Verilator, Makerchip, GHDL and OpenModelica.

eSim offers similar capabilities and ease of use as any equivalent proprietary software for schematic creation, simulation, and PCB design, without having to pay a huge amount of money to procure licenses. Hence it can be an affordable alternative to educational institutions and SMEs. It can serve as an alternative to commercially available/licensed software tools like OrCAD, Xpedition, and HSPICE.

Features of eSim:

 

• Draw circuits using KiCad, create a netlist, and simulate using Ngspice.

• Design PCB layouts and generate Gerber files using KiCad.

• Add/Edit device models(Spice Models) and subcircuits using the Model Builder and Subcircuit Builder tools.

• Perform Mixed-Signal Simulation.

• Support for Ubuntu and Windows OS.

• Interface with OpenModelica modeling software.

Link to website:

https://esim.fossee.in/home

Following are few circuit design projects done using esim:

1] Step-by-step guide on how to design and implement a Mixed-Signal Circuit of 2:1 Multiplexer. 
2] Step-by-step guide on how to design and implement a Half Adder using CMOS and sky130nm PDK. 
3] Step-by-step guide on how to design and implement a 2:1 MUX using CMOS and sky130nm PDK. 
4] Step-by-step guide on how to design and implement a Full adder using CMOS and sky130nm PDK.