Ex No: 05 - Design & Implementation of 1-Bit Full Adder Using Cadence Virtuoso

Aim

The aim is to design and implement a 1-bit Full Adder using Cadence Virtuoso and verify its functionality through transient analysis simulation.

Tools Required

Cadence Virtuoso Suite

• Virtuoso Schematic Editor (for circuit design)
• Spectre Simulator (for circuit simulation)

Process Design Kit (PDK)

• CMOS technology library

Computer System

• Minimum 4GB RAM and a multi-core processor

Procedure

1. Launch Cadence Virtuoso Environment:

• Open the Cadence Virtuoso tool and set up the working library.
• Create a new schematic cell view for the 1-bit Full Adder design.

2. Schematic Design:

• Select NMOS and PMOS transistors from the library.
• Construct the Full Adder circuit using CMOS.
• Connect the inputs (A, B, Cin) and outputs (Sum, Cout) properly.

3. Simulation:

• Check the design for errors and proceed with simulation.
• Launch the Analog Design Environment (ADE).
• Perform transient analysis to verify the output logic.
• Set up input stimulus and analyze the output waveform.

Circuit Diagram

Truth Table for 1-Bit Full Adder

Schematic Diagram

1. Schematic of 1-Bit Full Adder:

Output

Transient Analysis Output:

Results

1. Successfully designed the 1-bit Full Adder schematic using Cadence Virtuoso.
2. Performed transient analysis, verifying the correct operation of the Full Adder.
3. Observed correct logic switching behavior in response to input signals.