MOS Logic - Hacettepe Universityusezen/ele315/nmos-cmos-2sp.pdf · MOS Logic s e t a g S OM•N –...

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1 MOS Logic MOS Logic • NMOS gates – Fabrication – Modes of operation • NMOS Inverters and Analysis – General NMOS Inverter – Resistor Loaded NMOS Inverter – E-MOSFET loaded NMOS Inverter – D-MOSFET loaded NMOS Inverter

Transcript of MOS Logic - Hacettepe Universityusezen/ele315/nmos-cmos-2sp.pdf · MOS Logic s e t a g S OM•N –...

Page 1: MOS Logic - Hacettepe Universityusezen/ele315/nmos-cmos-2sp.pdf · MOS Logic s e t a g S OM•N – Fabrication – Modes of operation ... CMOS NAND Gate CMOS NAND Gates. 23 CMOS

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MOS Logic

MOS Logic

• NMOS gates– Fabrication– Modes of operation

• NMOS Inverters and Analysis– General NMOS Inverter– Resistor Loaded NMOS Inverter– E-MOSFET loaded NMOS Inverter– D-MOSFET loaded NMOS Inverter

Page 2: MOS Logic - Hacettepe Universityusezen/ele315/nmos-cmos-2sp.pdf · MOS Logic s e t a g S OM•N – Fabrication – Modes of operation ... CMOS NAND Gate CMOS NAND Gates. 23 CMOS

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NMOS (n-channel E-MOSFET) Fabrication Examples

CMOS Fabrication Example

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IV Characteristics

NMOS modes of operation

(a) Cutoff mode (b) Linear mode

(c) Saturation mode (d) body-bias effect on threshold voltage

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General NMOS Inverter

Graphical analysis when load is a resistor

Page 5: MOS Logic - Hacettepe Universityusezen/ele315/nmos-cmos-2sp.pdf · MOS Logic s e t a g S OM•N – Fabrication – Modes of operation ... CMOS NAND Gate CMOS NAND Gates. 23 CMOS

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Load capacitance

Power dissipation

PDD = VDD (IDD(OH) + IDD(OL)) / 2

VDD IDD(OL) / 2

(a) Static power dissipation

(b) Transient power dissipation

PD = CL V2DD

: frequency at which the gate is switched

PTOTAL = PDD + PD

Page 6: MOS Logic - Hacettepe Universityusezen/ele315/nmos-cmos-2sp.pdf · MOS Logic s e t a g S OM•N – Fabrication – Modes of operation ... CMOS NAND Gate CMOS NAND Gates. 23 CMOS

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Resistor Loaded NMOS

Resistor Loaded NMOS Inverter

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Propagation Delay

Fall time

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E-MOSFET Loaded NMOS

E-MOSFET Loaded NMOS Inverter

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D-MOSFET Loaded NMOS

D-MOSFET Loaded NMOS Inverter

Page 10: MOS Logic - Hacettepe Universityusezen/ele315/nmos-cmos-2sp.pdf · MOS Logic s e t a g S OM•N – Fabrication – Modes of operation ... CMOS NAND Gate CMOS NAND Gates. 23 CMOS

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NMOS Gates

Symbol Shorthands

Page 11: MOS Logic - Hacettepe Universityusezen/ele315/nmos-cmos-2sp.pdf · MOS Logic s e t a g S OM•N – Fabrication – Modes of operation ... CMOS NAND Gate CMOS NAND Gates. 23 CMOS

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NOR Gate

NOR Gates

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NAND Gate

OR Gates

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AND Gates

Example

Page 14: MOS Logic - Hacettepe Universityusezen/ele315/nmos-cmos-2sp.pdf · MOS Logic s e t a g S OM•N – Fabrication – Modes of operation ... CMOS NAND Gate CMOS NAND Gates. 23 CMOS

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AOI (AND-OR-INVERT) Gates

Examples

Page 15: MOS Logic - Hacettepe Universityusezen/ele315/nmos-cmos-2sp.pdf · MOS Logic s e t a g S OM•N – Fabrication – Modes of operation ... CMOS NAND Gate CMOS NAND Gates. 23 CMOS

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XOR/XNOR Gates

Hysteresis

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Schmitt Trigger

Transmission Gate

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Transmission Gate Array

CMOS Logic

Page 18: MOS Logic - Hacettepe Universityusezen/ele315/nmos-cmos-2sp.pdf · MOS Logic s e t a g S OM•N – Fabrication – Modes of operation ... CMOS NAND Gate CMOS NAND Gates. 23 CMOS

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CMOS Inverter

CMOS Inverter

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Symmetric CMOS Inverter

Capacitance Effect on Transition - 1

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Capacitance Effect on Transition - 2

Electrostatic Discharge (ESD) Protection

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CMOS Gates

Symbol Shorthands

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CMOS NAND Gate

CMOS NAND Gates

Page 23: MOS Logic - Hacettepe Universityusezen/ele315/nmos-cmos-2sp.pdf · MOS Logic s e t a g S OM•N – Fabrication – Modes of operation ... CMOS NAND Gate CMOS NAND Gates. 23 CMOS

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CMOS NOR Gate

CMOS NOR Gates

Page 24: MOS Logic - Hacettepe Universityusezen/ele315/nmos-cmos-2sp.pdf · MOS Logic s e t a g S OM•N – Fabrication – Modes of operation ... CMOS NAND Gate CMOS NAND Gates. 23 CMOS

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CMOS AND/NAND Gate

CMOS OR/NOR Gate

Page 25: MOS Logic - Hacettepe Universityusezen/ele315/nmos-cmos-2sp.pdf · MOS Logic s e t a g S OM•N – Fabrication – Modes of operation ... CMOS NAND Gate CMOS NAND Gates. 23 CMOS

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CMOS AOI Gates

CMOS AOI Gates

Page 26: MOS Logic - Hacettepe Universityusezen/ele315/nmos-cmos-2sp.pdf · MOS Logic s e t a g S OM•N – Fabrication – Modes of operation ... CMOS NAND Gate CMOS NAND Gates. 23 CMOS

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CMOS AND-OR Gate

CMOS OAI Gates

Page 27: MOS Logic - Hacettepe Universityusezen/ele315/nmos-cmos-2sp.pdf · MOS Logic s e t a g S OM•N – Fabrication – Modes of operation ... CMOS NAND Gate CMOS NAND Gates. 23 CMOS

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CMOS AOI Gates

Example

Page 28: MOS Logic - Hacettepe Universityusezen/ele315/nmos-cmos-2sp.pdf · MOS Logic s e t a g S OM•N – Fabrication – Modes of operation ... CMOS NAND Gate CMOS NAND Gates. 23 CMOS

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Example

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XOR Gate


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