NAVEDTRA 14185A, NEETS Mod. 13, Ch. 3 Flashcards
Which gate is a modified OR gate that produces a HIGH output when only one of the inputs is HIGH?
Exclusive OR (XOR)
What are combinations of logic gates that combine binary values to obtain a sum?
Adders
Which circuit can add two binary digits but will not produce a carry?
Quarter adder
What is designed to combine two binary digits and produce a carry?
Half adder
Subtraction is accomplished in computers by the R’s complement and what other method?
ADD
What may be used to store data temporarily, to multiply or divide, to count operations, or to receive and transfer information?
Flip-flops
Which type of bistable device changes state on command from a common input terminal?
Toggle
What is the most widely used FF because of its versatility?
J-K FF
What is a timing signal generated by the equipment to control operations?
Clock
The frequency stability of the astable multivibrator can be increased by applying what to the circuit?
Trigger pulse
What allow functions involving more than one operation to be completed during a single clock cycle?
Multiphase clocks
What do most modern high-speed equipment use as the basis for their timing networks?
Crystal-controlled oscillators
What is the total number of counts or stable states a counter can indicate called?
Modulus
Which term is used to describe the count capability of counters?
Modulo
Which term means that the events (setting and resetting of FFs) occur one after the other rather than all at once?
Asynchronous
High-frequency operations require that all the FFs of a counter be triggered at the same time to prevent errors. Which type of counter is used for this type of operation?
Synchronous
What is defined as a loop of bistable devices (flip-flops) interconnected in such a manner that only one of the devices may be in a specified state at one time?
Ring counter
Which type of temporary storage device is used to store data, memory addresses, and operation codes?
Register
Which type of register can the contents be shifted one or more places to the left or right?
Shift register
Which term means that the data is moved along a single line one bit at a time?
Serial transfer
Which term means that each bit of data is moved on its own line and that all bits transfer simultaneously?
Parallel transfer
Which term means to change the magnitude of a number?
Scaling
What are groups of logic circuits that are based on particular types of elements (resistors, transistors, and so forth)?
Logic families
What is the feature known as when the output of one logic circuit can be used as the input to another logic circuit?
Compatibility
