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ECE 322L:
Microelectronics Lab
Lab #6:
NMOS and CMOS Logic
Objectives:
Learn how to design digital logic gates using NMOS transistors and resistors
(NMOS logic) or with NMOS and PMOS transistors (CMOS logic).
Materials:
Voltmeter
Solderless breadboard
Hookup wire
One 330
Ω
resistor
Three ZVN3306A NMOS transistors
Two ZVP3306A PMOS transistors
Setup:
Construct the circuit below using a ZVN3306A NMOS transistor and 330
Ω
resistor.
The
ZVN3306A and ZVP3306A have three terminal wires in a row.
The middle one is the
gate (G).
The source and drain are not interchangeable (because the body is hardwired to
the source).
Holding the package with the leads pointing away from you and the flat side
to your right, the source (S) is on the bottom and the drain (D) is on the top.
Background:
The voltages and currents in analog circuits can take on any values.
In digital circuits the
electrical variables are restricted to two discrete values (i.e., binary).
These values of
voltage are usually designated as logic state 0 and logic state 1.
Often state 0 refers to a
“small” voltage and state 1 refers to a “large” voltage.
A digital circuit is an electrical
circuit that operates on binary valued input voltages and produces binary valued output
voltages.
Logic gates implement electrically the logical operations of AND, OR, and
NOT.
These logical operations are described in words or truth tables (which are a table
of outputs for each possible input), and further each logic operation is given a symbol.
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 Spring '08
 STAFF
 Gate, Microelectronics, Transistor, Volt

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