Cascode voltage switch logic: A differential CMOS logic family

Project Code :TVMABE361

Objective

The objective of this project is to design and analyze a Cascode Voltage Switch Logic (CVSL) differential CMOS logic family for high-speed and low-power digital circuit applications. It focuses on leveraging differential operation to achieve faster switching, reduced noise, and improved signal integrity compared to conventional CMOS logic. The design will be simulated and evaluated for key parameters such as propagation delay, power consumption, and noise margin. Comparative analysis will be carried out to demonstrate the advantages of CVSL over traditional single-ended logic families. The overall goal is to develop a high-performance, energy-efficient logic design suitable for advanced VLSI and high-speed digital systems.

Abstract

Abstract:

A differential CMOS Logic family that is well suited to automated logic minimization and placement and routing techniques, yet has comparable performance to conventional CMOS, will be described. A CMOS circuit using 10,880 NMOS differential pairs has been developed using this approach.

NOTE: Without the concern of our team, please don't submit to the college. This Abstract varies based on student requirements.

Specifications

· Tool Used: Cadence EDA tools for schematic and simulation

· Technology Node:45nm CMOS process.

· Design Elements: complementary differential pull-down network (NMOS pairs), cross-coupled PMOS load transistors, cascode NMOS devices for improved isolation, differential input logic network, static biasing through VDD and GND, internal node capacitance control, differential output nodes (OUT and OUT̅), feedback through cross-coupled structure, symmetric transistor sizing, and careful layout matching for reduced mismatch and skew.

· Optimization Goal: minimize circuit complexity and parasitics (transistor count and internal capacitances) while preserving high-speed differential switching, full-swing outputs, low switching noise, strong noise immunity, and stable operation across process, voltage, and temperature variations, with low power consumption suitable for high-performance VLSI digital applications

Learning Outcomes

1.Understanding the principles of Cascode Voltage Switch Logic (CVSL)

2.Knowledge of differential CMOS logic operation

3.Ability to design CVSL-based logic circuits

4.Understanding of cross-coupled PMOS load operation

5.Analysis of power, delay, and noise performance in differential logic

6.Insight into cascode techniques for high-speed switching

Demo Video

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Front End Domains

Cadence EDA
Finite State Machines
Arithmetic Core
DSP Core
Communications
Nano Technology
Testing

Back End Domains

Nano Technology
Cadence EDA
Low Power VLSI
Core Memories
Transistor Logic

Tools

FPGA
H-Spice
Cadence EDA
QCA
Xilinx Vivado
Xilinx ISE
Tanner EDA
LT-Spice

Others

Matlab Interfacing

H-Spice

LT-Spice