Digital Electronics Test 7

What is an analog-to-digital converter?

The controls on an oscilloscope that will help obtain a stable display are in the ________.

Hex is often used in digital applications as a shorthand way to represent strings of bits.

Use Boolean algebra to find the most simplified SOP expression for F = ABD + CD + ACD + ABC + ABCD.

The Boolean expression C + CD is equal to ________.

As a technician you are confronted with a TTL circuit board containing dozens of IC chips. You have taken several readings at numerous IC chips, but the readings are inconclusive because of their erratic nature. Of the possible faults listed, select the one that most probably is causing the problem.

For the XNOR gate truth table shown below, the values for w, x, y, and z are ____, ____, ____, and ____, respectively.

The output pulse width for a 555 monostable circuit with R₁ = 3.3 k and C₁ = 0.02 F is ________.

The J-K flip-flop is a standard building block of clocked (sequential) logic circuits known as a ________.

A glitch that appears on the decoded output of a ripple counter is often difficult to see on an oscilloscope because ________.

Which is not part of a hard disk drive?

Each programmable array logic (PAL) gate product is applied to an OR gate and, if combinational logic is desired, the product is ORed and then:

The programming technologies that are used in CPLD devices are all nonvolatile.

The GAL22V10 has 12 outputs pins and 10 input pins.

The symbol shown below is an AND gate.

Add the following BCD numbers.

0110		0111		1001
0101		1000		1000

Whenever a totem-pole TTL output goes from LOW to HIGH, a high-amplitude current spike is drawn from the V_cc supply. How is this effect corrected to a digital circuit?

What is the purpose of a decoder's inputs?

In a typical IC monostable multivibrator circuit, at the falling edge of the trigger input, the output switches HIGH for a period of time determined by the ________.

A microcontroller is called a computer on a chip.