TPC 291 Flashcards
In Boolean algebra, All logic functions can be expressed by equations based on three operations:
AND; OR; NOT
For an AND gate, the output Is TRUE if input A is _____ and input B is ______.
TRUE; TRUE
A solid-state logic switch must be able to:
Indicate which state is at its’ input
The AND function in positive logic is equivalent to the ______ function in negative logic.
OR
If CMOS logic is used in a circuit with TTL logic, the input voltage is usually:
5 V
An application requires an R-S flip-flop that will trigger when S goes HIGH and reset when R goes HIGH. The required flip-flop can be made of ______ gates.
Two NOR
The advantage of using R-S flip-flop with a mechanical switch is that the flip-flop ______ the output when the switch changes.
Eliminates extra pulses from
The output of a clocked flip-flop will change only when the clock pulse is:
Present
If you need to use a sine-wave to control the frequency of a logic clock, you can use a ______ to produce sharp clock pulses.
Schmitt trigger
What is the hexadecimal equivalent of the binary numeral 11100?
1C
The problem with ripple counters is that the:
Propagation delay is cumulative
A device commonly used for converting parallel data to serial data is the:
Multiplexer
A half-adder can be made of an _______ gate and an ______ gate.
AND; Exclusive OR
Large memories are typically accessed by:
Matrix addressing
Unlike a RAM, a ROM:
Stores data that does not change
An output interface contains a ______ that produces a ______ signal in response to the output of the logic system.
Transistor; High voltage
A programmable logic array consists of many ______ that can be connected in various ways by _______.
Logic gates; Fusible links
One of the problems with microprocessors is that they must perform logic operations ______ and perform them ______.
One-by-one; In sequence
Seven binary digits in the ASCII code can represent a certain number of alphanumeric characters. How many characters can be represented by a code that uses one more digit?
Twice as many
Parallel data transfer is ______ than serial transfer, but serial transfer is ______.
Faster; Simpler
Intermittent problems in solid state equipment are often caused by:
Faults in the software
Your first step in troubleshooting a solid state system should be to:
Gather information
One of the best ways to speed up troubleshooting in logic circuits is to:
Follow a troubleshooting tree
A good general practice for localizing trouble in logic systems includes:
Performing the easy test first
