Digital chapter 3 & 4

Identify the symbol.

AND gate

A circuit simulator such as Electronic Workbench® or MultiSIM® contain a useful instrument called a _____ used to convert back and forth from truth table to Boolean expression.

logic converter

The Boolean expression (A + B) • (C + D) = Y is in _____ form.

product-of-sums

More complicated combinational logic problems are solved with ________

programmable logie devices (PLD)

he Boolean expression A' • B' + B • C = Y is in _____ form.

sum-of-products

Refer to Fig. 3-74(a). These CMOS digital devices are enclosed in a tiny SOIC package which is fastened to a PC board using ________.

surface-mount technology

Which logic gate might be called the "any but not all" gate?

two-input XOR gate

Boolean expression such as? Also known as?

(A+B) (C+D)=Y OR-AND

The applied voltage (Vcc) is typically connected to pin ____ for the 7400 series of TTL ICs.

14

The PC board pad labeled ________ is the Vcc pin on the 7408 IC in Fig. 3-71.

14 A

The truth table for four variables has _____ possible combinations.

16

Which logic gate might be called the "any but not all gate"?

2 input XOR

The GND connection is typically connected to pin ____ for the 7400 series TTL ICs.

7

The pin labeled with a "C" on the IC in Fig. 3-72 is pin number ________.

7

The PC board pad labeled ________ is the GND pin on the 7408 IC in Fig. 3-71.

7 D

The unit shown in Fig. 3-72 is a ________ TTL 14-pin DIP IC.

7408

The truth table for three variables has how many possible combinations?

8

What is the Boolean expression for OR ?

A + B =Y

What is the Boolean expression for NOT?

A = A not

What is the Boolean expression for NOR?

A not + B not = Y

What is the Boolean expression for NAND?

A not • B not =Y

What is the Boolean expression for AND?

A • B =Y

Boolean expression such as? Also known as?

AB+CD=Y AND-OR

The ____________ gate is sometimes referred to as the "all or nothing" gate.

AND

The unique output of a(n) ________ gate is HIGH only when all inputs are HIGH.

AND

These two NAND gates wired together will produce the_______ logic function.

AND

This combination of gates will generate the_______ logic function.

AND

Which logic gate might be called the "all or nothing" gate?

AND

The following Sum of products Boolean expression can also be referred to as ________ ________. AB + CD = Y

AND OR Not sure if it's right

an ______ HIGH input is a digital input which executes its function when a ______ is present.

Active, high

Pin 1 of the IC shown in Fig. 3-73 is labeled with the letter ________.

B

The _____________ expression is a universal language used by engineers and technicians in digital electronics.

Boolean

A ________ ________ is a mathematical representation of a logic function.

Boolean expression

The PC board pad labeled ________ is pin 1 of the IC in Fig. 3-71.

C

Very low power consumption is an advantage of _______ digital ICs.

CMOS

PIn 1 of the IC shown in Fig. 3-72 is labeled with the letter ________.

D

Multiplexers are also called ________ ________.

Data selectors

Some manufacturers of integrated circuits have simplified the task of solving some combinational logic problems by producing ______ ______

Data selectors

________ ________ allow us to convert back and forth from midterm to maxterm forms of Boolean expressions.

De Morgan's theorems Still unsure if its right

Being __________ means the output of the AND gates stays ______ and the clock signal is blocked from passing through to the output.

Disabled, low

When using CMOS ICs, all unused inputs are tied to _______ or Vdd.

GND

Combining _______ in combinational logic circuits from Boolean expressions is a necessary skill for most technicians and engineers.

Gates

Boolean algebra was originated by ______ ______

George Boole

Combinational logic problems can be solved with _______ using traditional ICs

Hard logic

In a three-state buffer, when the control (C) input goes HIGH, its output goes to a ________-__________

High impedance state

A NOT gate is also called commonly called a(n)_______

Inverter

Identify the symbol.

Inverter

The NOT circuit is often referred to as a(n) _____________.

Inverter

A graphic method of reducing Boolean expressions to simpler forms is performed by a ________ ________.

Karnaugh mapping Not sure if it's right

The truth table is another precise method of describing how a ________ circuit works.

Logic

The Boolean expression (A+B) (B+C) = Y is in________ (maxterm, minterm) form.

Maxterm

The Boolean expression A ∙ B + C ∙ D = Y is called the sum-of-products or what form?

Minterm

The Boolean expression AB + BC = Y is in______ (maxterm, minterm) form.

Minterm

Look at the chart in Fig. 3-70. Which logic gate always responds with an output of logical 0 only when all inputs are HIGH?

NAND

The ________ gate can be used as a universal gate.

NAND

The output of ______________ gate is "LOW only when all inputs are HIGH"

NAND

The unique output of a(n)________ gate is LOW only when all inputs are HIGH.

NAND

This combination of gates will generate the ________ logic function.

NAND

Identify the symbol.

NAND gate

The unique output of a ________ gate is HIGH only when all inputs are LOW.

NOR

Identify the symbol.

NOR gate

The _______ gate complements, inverts or negates the input

NOT

The _______ gate complements, inverts or negates the input.

NOT

Which logic circuit complements the input?

NOT

The ____________ gate is sometimes referred to as the "any or all" gate.

OR

The unique output of a(n) ________ gate is LOW only when all inputs are low.

OR

Which logic gate might be called the "any or all gate"?

OR

Identify the symbol.

OR gate

_______ is The generic name for an IC that can be programmed by the user to execute a complex logic function.

PLD

A ______ is an IC that can be programmed by the user to execute a complex logic function.

Programmable Logic Device (PLD)

The tabular method used by computer software such as Multisim is called the _______-_______ ______

Quine-McCluskey method.

Digital circuits that have a memory or storage capability are called ________ ________ ________.

Sequential logic circuits

CMOS ICs can be damaged by _______ _______.

Static charges

A NOT gate is said to invert, to negate or to complement the input. (True or False)

T

T or F A four-input NAND gate can be wired using 2 two input NAND gates and 1 two-input OR gate.

T

A ________ ________ is a tabular listing of all inputs and resultant output conditions for a logic function or circuit.

Truth table

A ________ ________ shows a listing of all inputs and resultant output conditions for a logic function or circuit.

Truth table

The _________ ________ is the orgin of most logic circuits.

Truth table

The three methods used to describe a combinational logic circuit are by its_________ _________, Boolean expression, or logic symbol diagram.

Truth table

Fig. 3-60(b) is an example of a ________ diagram that might be used by service personnel.

Wiring

A __________ gate produces a HIGH output only when an odd number of HIGH inputs are present.

XOR

The ____________ gate is sometimes referred to as the "odd but not even gate".

XOR

The unique output of a ________ gate is HIGH only when an odd number of inputs are HIGH.

XOR

Which logic gate might be called the "any but not all" gate?

XOR

What precaution should be taken when storing the DIP IC like the one in Fig.3-73?

avoid static electricily

The use of logic gates to produce a desired output immediately is called ________ ________

combinational logic