1bit comparator 90n cmos layout design

8/16/2019 1bit Comparator 90n CMOS Layout Design

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1 BIT

COMPARATO

By

1. CHONG WEI TING 1510104

2. TAN YI QUAN 15101053. NUR AZIZAN BIN ANUAR 1510105

4. ONG PEI CHEEI 1510105

5. HENG TICK PONG 1510334

UNIVERSITI MALAYSIA PERLIS

SCHOOL OF

MICROELECTRONIC

ENGINEERING

EMT 243 INTRODUCTION TO IC

DESIGN

MINI PROJECT

DESIGN PROBLEM 2:

ONE BIT COMPARATOR CMOS

LAYOUT DESIGN

Semester 2

Session 2015/2016


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INTRODUCTION

Compares two different signal (Current, Voltage etcproduces the digital output based on the compariso

Widely use in analog to digital converters (ADCs), me

sensing circuits and recently also on chip transceiver


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Applications of comparator :1) Voltage comparator : a comparator circuit that compares two voltage

determines which one is greater. The result of this comparison is indic

output voltage.

2) Control applications in which the binary numbers representin

variables such as temperature, position are compared with a reference

outputs from the comparator are used to drive the actuators so as to physical variables closest to the set or reference value.


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BLOCK DIAGRAM & SYMBOL


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TRUTH TABLE

A B A=B A>B A

0 0 1 0

0

1

0

0

1 0 0 1

1 1 1 0


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K-MAP & BOOLEAN EQUATION UNDE

DIFFERENCE CONDITION

A=B

B’= 0 B= 1

A’= 0 1 0

A= 1 0 1Out=A’ B’ + AB (XNOR)

A>B

B’= 0 B= 1

A’= 0 0 0

A= 1 1 0Out=AB’

A


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GATE LEVEL SCHEMATICModification

reduce transi

capacities (Disfurther soo


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Euler path 1= { A’, B, A ,B’ } Euler path 2 = { A’,B } Euler path 3 = { A, B’

TRANSISTOR LEVEL SCHEMATIC


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MODIFICATION VERSION


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STICK DIAGRAM

Contact

P-diffusion

N-diffusion

PolysiliconN-well

Metal 2

Metal 1


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CMOS LAYOUT DESIGN

REFER NEXT SLIDEFOR DESIGN RULE


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CMOS 90n DESIGN RULE


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WAVEFORM SIMULATIO


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COMPARE

FUNCTIONAL SIMULATION

USING QUARTUS 2

LAYOUT SIMULATIONUSING MICROWIND


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DISCUSSION

Truth Table &

Booleanexpression

Gate leveldesign

Transistorlevel

design

StickDiagram

LayoutDesign

Mini Project Process Flow


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DISCUSSION

Boolean expression 1= AB’

Boolean expression 2= A’B

Boolean expression 3= A XNOR B

Boolean expression 1= AB’

Boolean expression 2= A’B

Boolean expression 3= AB’ + A’B


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DISCUSSION

A B A=B A>B A


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CONCLUSION Comparator is a combinational logic circuit that used to compare at least

and produce desired output while 1 bit comparator is design to compar

voltages signal and producing an output when any three of the conditi

A=B, A>B and A


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he end

1bit comparator 90n cmos layout design

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