Review: Ohm’s Law

Review: Ohm’s Law

PP Presentation

Ohm’s Law

Ohm’s Law

Resistors in series add

Simple circuit

Simple circuit #2

Simple circuit #2

Simple circuit #2

R ~ L, ~ 1/A

Heat production

Capacitors

The Field Effect Transistor

apply voltage to gate, put electrons on it

Depletion

Depletion FET

Types of MOSFETs

The Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET)

New material : Properties of silicon

Properties of silicon

Properties of silicon

n-channel versus p-channel n means negative charges in channel p means positive charges in channel

n-channel versus p-channel

Complimentary MOS Voltage has opposite effects on channel types

Sometimes the conducting channel is already “pinched off”

Applying voltage turns transistor “on”

Enhancement FET

Types of MOSFETs the “Zoo”

Simple MOSFET switch

Simple MOSFET switch; V (gate) = 0

Simple MOSFET switch; V (gate) = 0

MOSFET switch; V (gate) = positive

MOSFET switch; V (gate) = positive

MOSFET switch; V (gate) = positive

MOSFET switch transistor has a little resistance, but dosen’t matter

MOSFET switch; V (gate) = positive

Simple electrical switch

Simple electrical switch

What “logic” did it do?

Binary logic

Easiest logic function: INVERSION (NOT)

How to do with switches solid for In = 0 dotted for In = 1

In = 0

In = 1

How to do with MOSFET switches

PP Presentation

PP Presentation

Summary



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