Logic Simulator

Course Assignment - EE 677 - Foundations of VLSI CAD

We can simulate any combinational circuit using this Logic Simulator

Author: Rohan Rajesh Kalbag

Open logic_simulator.ipynb to see the code working in action, and access the code, relevant markdown documentation, for the 2X1 MUX netlist example which is given at /circuit.txt

Instructions to use the Logic Simulator

• Set up Python 3.x virtual environment and use the command in terminal pip install -r requirements.txt to make sure you have all the required dependencies.
• If needed change the /circuit.txt in such a way as following the following netlist convention given after instructions
• Run the python script logic_sim.py using python ./logic_sim.py and find the output truth table in truthtable.csv

Input Netlist Convention

We shall use .txt netlist file with a NGSPICE like style to describe the various components connected, to input the circuit configuration which we wish to simulate. This is an example

* this is a comment

* inp <nodes seperated by spaces> denotes input nodes to circuit

inp n1 n2 n4 n6


* outp <nodes seperated by spaces> denotes output nodes to circuit

outp n3 n5 n7


and n1 n2 n3

* denotes and gate with inputs n1 and n2, output as n3


or n3 n4 n5 

* denotes or gate with inputs n3 and n4, output as n5 


inv n6 n7

* denotes inverter with input n6 and output n7