MULTI Threshold

FINAL TERM PRESENTATIONon

“MULTI-THRESHOLD”

SUB:- VLSI CIRCUIT DESIGNSEC:-[E]

American International University-Bangladesh (AIUB)Date : 13-12-2015

Prepared ForTAWSIF IBNE ALAM

Faculty of EEE Department

Group members :-Name ID

KABIR, SHARIF RAIHAN 12-21365-2

HASAN, ASIF MAHMUD 12-21535-2

ALAM, MIM SHAH NEWAJ 12-21951-2

OUTLINE:

• INTRODUCTION.• DIAGRAM.• METHODOLOGY.• APPLICATIONS.• REFERENCE.

INTRODUCTION • Multi-threshold is one kind of CMOS which is a deviation in

the chip technology.• It has transistor with multiple threshold voltages in order to

optimize delay or power.• It can achieve a lower threshold voltage, and therefore, higher

performance as well as smaller standby leakage current.• Simple threshold of making MOS with multiple threshold

voltages is to apply different bias voltage to the body or substrate terminal of the transistors.

• It enables high performance and low power operation, but requires sequential circuit structures that can retain state during standby modes.

SCHEMATIC DIAGRAM OF MTCMOS:

PMOS & NMOS INSERTION MTCMOS:

METHODOLOGY:• The MTCMOS technique uses a different apart from conventional

sleep transistor approach for reducing power dissipation.• The MTCMOS technique reduces the power dissipation by

maintaining the different properties which are responsible for it; some of them are as electron movement in ground and supply wire.

• This technique uses sleep transistor but with different characteristics, it uses a set of high threshold sleep transistors i.e. PMOS and NMOS .

• When this high threshold transistors are turned off then a very low sub threshold leakage current passes from Vdd to ground.

• In the case of both the input are different it gives the strong high output wher as n the case of both logic high and low it give a strong low output.

APPLICATIONS:

• Mobile Applications:• Mostly in the idle state.• Sub-threshold leakage current.

• Power Gating: Low Vth Transistors for High performance Logic

Gates. High Vth Transistor for Low Leakage Current Gates.

REFERENCES

[1] www.google.com/question _VLSI/[2] www.geni.org/[3] www.energypedia.info/[4] www.eschooltoday.com/ MULTI THRESHOLD .

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THANK YOU.

For further information email: join2sharif@gmail.com