VLSI DESIGN

Contents• About Cadbridge semiconductor

• IC & Classification

• VLSI introduction & objective

• VLSI design flow

• VLSI application

• VLSI companies in India

• How can we placed in cadbrige semiconductor

• IEEE paper implemented , improved & work on by me.

• Conclusion

Cadbridge semiconductor

• CADBRIDGE SEMICONDUCTOR is a emerging company in electronics field.

• Corporate office - greater Noida .• Branch office - jalander ( Panjab) , jaipur ( Rajasthan)

introduction

Vision • To support a multicultural environment and make it

our business to hire, inspire and develop the very best people in the industry, worldwide.

Area of workWork on

• Memories

• PCB Design

• Digital security lock

• Robots

• Image processing

• MATLAB

• ARM KIT

• AVR KIT

Fature project

• FPGA Board design

• CPLD Board design

• DSP KIT Design

• microcontroller

Arm kit Avr kit

products

Integrated Circuits(ICs)

What is Integrated Circuit?

Integrated Circuits contains several transistors fabricated on a single chip.

Classification of Integrated CircuitsSize classification( historical ) <100 SSI 1963

100-3000 MSI 1970

3000 – 30000 LSI 1975

30000 – 1000000 VLSI 1980

> 1000000 ULSI 1990

VLSI introduction : Objectives

introduction :• A VLSI (Very Large Scale Integration) system integrates millions of

“electronic components” in a small area (few mm2 few cm2).

Objectives: design “efficient” VLSI systems that has:

• Circuit Speed (high )

• Power consumption ( low )

• Design Area ( low )

Vlsi design flow1. idea (need) 2.

specifications3. design architecture 4. RTL

coding

5. RTL Verification

6. Synthesis

7.Foundry8.IC Chip

1. Ideas

• Microprocessor• Microcontroller• Memories• Printer• Mobile• Digital security lock

Any thing we needs chip

This is the crucial step as it will affect the future of the product. Here, vendors may want to get feedback from potential customers on what they are looking for

• Instruction set

• Interface (I/O pins)

• Organization of the system

• Functionality of each unit in the system, and how to communicate it to other units.

2.Specifications

3. Design architecture

• This is where the main work starts. With the help of the specification sheet the target IC’s architecture is decided and a layout for same is created by design engineers using EDA tools.

EDA Tools : • Synopsys – astro• activehdl• Xilinx - ise design suite• Cadence - encounter digital ic design

4. RTL codingRTL - register transfer level. • This implies that the

VHDL/VERILOG code written based on the architecture describes how data is transformed as it is passed from register to register.

RTL coding tools• xilinx ise,• Vim,• Emacs, • conTEXT,• HDL TurboWriter

VHDL• Not case sensitive.

• Difficult to learn.

• Based on pascal & ada.

• Strongly typed.

VERILOG• Case sensitive.

• Easy to learn.

• Based on c.

• Not strongly typed.

HDL – Hardware Description Language � A programming language that can describe the functionality and timing of the hardware.

Types of HDL • VHDL ( Very high speed integrated circuit Hardware

Description Language)• VERILOG • SYSTEM VERILOG

Difference

5. RTL Verification

RTL simulation and verification is one of the important step. This ensures that the design is logically correct and without major timing errors. It is advantageous to perform this step, especially in the early stages of the design. 

RTL verification tools •

Modelsim

• Finsim

• Verilog - XL

• TestBuilder

• Xilinx ise

RTL verification wave form

6. synthesis

This is where the design now start to get physical. Logic synthesis is a process by which the  desired circuit behavior i.e. Register Transistor Level is turned into a design in terms of logic gates which drives the circuit or architecture.

Synthesis tools/kit• FPGA

(Altera,digiland,xilinx)• CPLD ( altera ,

digiland )

FPGA KIT Field programmable gate array (FPGA) • It is a IC which can be be programmable by user to

capture the logic.• Capable to capturing 100,000 designed gates.

7.FoundryThe design is sent for Fabrication for mass production to foundry .

8.IC Chip

Application of VLSI

Vlsi companies in india

How can we placed in CAD BRIDGE

o DIGITAL ELECTRONICSo VERILOG (VLSI)o MATLABo FPGAo IMAGE PROCCESINGo EMBEDDED SYSTEMo PLC SCADAo ANTEENAo POWER ELECTRONICSo Wireless

communication

FULL TIME

PART TIME

WORKING TYPES

Knowledge about any following area

IEEE Research paper I have implemented

• Area-Efficient 3-Input Decimal Adders Using Simplified Carry and Sum Vectors.

• A review of clock gating techniques.

• A Pipelined 8to 10 bit Encoder for a High speed Transmission.

• VLSI implementation of adders for High speed ALU.

IEEE Research paper I have improved

• Design of High Speed Area Optimized Binary Coded Decimal Digit Adder and Multiplier .

• Area-Efficient 3-Input Decimal Adders Using Simplified Carry and Sum Vectors .

• VLSI implementation of adders for High speed ALU.

Research paper on which I am working

• Area and Power Efficient Viterbi Decoder for Storage.

• VHDL design of lossy DWT based image compression technique for video conferencing.

• Faster and Energy-Efficient Signed Multipliers.

• FPGA IMPLEMENTATION OF LOW POWER

PIPELINED 32-BIT RISC PROCESSOR .

Vlsi is suitabale for fabrication of larger number of components on a single chip.

VHDL/VERILOG is used for digital circuit designing and to validate the design and check the design specification.

CONCLUSION

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