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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.
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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.
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Introduction
• The topic deals with a design, architecture and working new
processor made up of carbon nanotubes which replaces silicon
from the existing processor.
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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
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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
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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
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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
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BLOCK DIAGRAMSchematic of a CNT processor
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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.
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Block Diagram DescriptionSUBNEG and program implementation
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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
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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
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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
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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.
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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.
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CONCLUSION References
1. Carbon Nanotube Computer, Nature | Vol 501|September 2013.
2. Carbon nanotubes for high performance electronics. Proc. IEEE 96,
201-211| 2008.