Appendix I - Continued - 14185_168
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Appendix I - Continued - 14185_167
Appendix II Logic Symbols
Neets Module 13-Introduction to Number Systems and Logic Circuits
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AI-4
QUOTIENT
The result in division.
RADIX POINT
The symbol that separates whole numbers and fractional numbers.
RADIX
The total number of symbols used in a particular number system.
REGISTER
A circuit of flip-flops designed to receive, store, and transfer data.
REMAINDER
The final undivided part that is less than the divisor.
RING COUNTER
A loop in which only one flip-flop will be set at any given time; used in timing.
RIPPLE (ASYNCHRONOUS) COUNTER
A circuit that counts from 0 to a specified value. Subject to error at
high frequency.
R’s (RADIX) COMPLEMENT
The difference between a given number and the next higher power of the
number system (1000
_{8}
minus 254
_{8}
equals 524
_{8}
).
R’s-1 (RADIX-1) COMPLEMENT
The difference between a given number and the highest value symbol in the
number system (777
_{8}
minus 254
_{8}
equals 524
_{8}
).
R-S FLIP-FLOP
A flip-flop with two inputs
S (set) and R (reset). The Q output is HIGH in the set mode and
LOW in the reset mode.
SERIAL DATA
All data bits are transferred one bit at a time along a single conductor.
SHIFT REGISTER
A register capable of serial-to-parallel and parallel-to-serial conversion and scaling.
SHIFTING
Moving the contents of a register right or left to scale the number or to input or output serial data.
SUBSCRIPT
A number written below and to the right of a value indicating the base or radix of the number
system in use (35
_{8}
).
SUBTRACTION
Taking away one number from another.
SUBTRAHEND
The quantity to be subtracted from the minuend.
SUM
The result in addition.
SYNCHRONOUS COUNTER
Performs the same function as a ripple counter but error free at high
frequency
.
T FLIP-FLOP
A single input flip-flop that changes state with each positive pulse or each negative pulse. Divides
input
frequency
by two.
TRUTH TABLE
A chart showing all possible input
combinations
and the resultant outputs.
UNIT
A single object.
UP/DOWN COUNTER
A counter circuit that can count up or down on command.
VINCULUM
A bar over a logic statement indicating the FALSE condition of the statement.
WHOLE NUMBER
A symbol that represents one or more complete objects.
ZERO
A symbol that indicates no numerical value for a position in positional notation.
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