Carbon Nanotube Processors.

Guided By,

Mrs. Suby Varghese.

Asst. Professor ,

ECE Department

T.K.M.I.T

Submitted By,

Syam Dayal

S7, EC B

Roll No: 38.

Objective

The main aim of implementing carbon nanotubes are :

• To introduce an efficient and a powerful processor made up of

carbon nanotubes, a semiconductor material that has the

potential to launch a new generation of electronic devices that

run faster, while using less energy, than those made from silicon

chips.

Introduction

• The topic deals with a design, architecture and working new

processor made up of carbon nanotubes which replaces silicon

from the existing processor.

The existing system is a silicon made processor which are widely used in

many electronic devices. Some of the disadvantages of silicon are:

1. High cost

2. Low thermal conductivity (149 W·m−1·K−1 )

3. Electrical conductivity low

4. Can produce 4 Ghz processor in a single core

5. Low energy-delay product

Existing system

What are carbon nanotubes?

• Carbon Nanotubes are hollow, cylindrical nanostructures composed

of single sheet of carbon atoms.

• Carbon Nanotubes (CNT) have exceptional electrical, physical and thermal properties.

• Carbon Nanotubes are stronger than steel and 200 times lighter than steel.

• Single walled Nanotubes are used in building Carbon Nanotube Processors.

Carbon nanotubes

Advantages of Carbon nanotubes:

1. Low cost

2. Very high thermal conductivity (3500 W·m−1·K−1 )

3. Very high electrical conductivity (higher than copper)

4. Can produce 10-15 Ghz processor in a single core

5. High energy delay product

4 bit processor

Gates are made up of Carbon nanotubes

Implemented using SUBNEG

Basic operating system can perform multitasking

Designed in MIPS architecture

Carbon nanotube processor

BLOCK DIAGRAMSchematic of a CNT processor

Stages of architecture

1. Instruction fetch: This stage supplies instruction memory with the address

to read.

2. Data fetch: This stage supplies the basic data needed for the instruction.

3. Arithmetic operations: This stage does the necessary arithmetic

operations for the instruction.

4. Write back: This stage writes back the output of the arithmetic operation to

the second argument location.

Block Diagram DescriptionSUBNEG and program implementation

Advantages of carbon nanotube processors.

• Free of energy leakage

• Highly energy efficient

• Can be implemented in present computer architectures like MIPS

• Enables multi-tasking

• Long life

• Use less power

• Smaller in size

Advantages

Future of carbon nanotube processor

• Continuous improvement of computational power at low energy

losses

• This basic instruction set can be extended to more powerful

processor

• Low metal usage helps us to built environment friendly processor

• Memory chips with Carbon Nanotubes which gives much more

dense memory

Disadvantages

Preparation of Carbon Nanotube are still very expensive

Metallic and semiconductor nanotubes cant be prepared with

high purity

It is very complex to build a processor using fully carbon

nanotubes

APPLICATIONSApplications

Carbon nanotube processors can be used for the implementation of:

Low power consuming electronic systems.

Small sized electronic gadgets.

Faster electronic devices.

Highly efficient computers and powerful computers.

Conclusion

• CNT’s have the potential to outperform silicon by improving the energy

delay product, a metric of energy efficiency by more than an order of

magnitude.

• Hence CNT’s are an exciting complement to existing semi-conductor

technologies.

CONCLUSION References

1. Carbon Nanotube Computer, Nature | Vol 501|September 2013.

2. Carbon nanotubes for high performance electronics. Proc. IEEE 96,

201-211| 2008.