LOGICS finals terms reviewer

Comparator

A combinational logic circuit that COMPARES TWO QUANTITIES and indicates whether or not they are equal

Decoder

A combinational logic circuit that CONVERTS CODED INFORMATION, such as binary, into a non-coded form, such as decimal

Encoder

A combinational logic circuit that CONVERTS INFORMATION, such as decimal or alphabetic, into coded form.

Demultiplexer

A combinational logic circuit that switches digital data from ONE INPUT line to SEVERAL OUTPUT lines in a time sequence

Multiplexer

A combinational logic circuit that switches digital data from SEVERAL INPUT lines to SINGLEOUTPUT in a time sequence

Binary Adder

A digital circuit that PRODUCES ARITHMETIC SUM

Binary Adder

A digital circuit that produces the arithmetic sum of two binary numbers.

Positive Going Pulse

A digital pulse that goes from a normally LOW LOGIC LEVEL TO HIGH LEVEL then back again.

Decoder

A logic circuit that converts coded binary information from N-input lines and activates only the output that corresponds to the input code.

Full-Adder

A logic circuit that is able to ADD THREE BITS IN BINARY fashion

Half-adder

A logic circuit that is able to ADD TWO BITS IN BINARY fashion

Full Adder

A logic circuit that is able to add three bits in binary fashion

Tri-state logic

A logic device that when its high impedance state, the circuit connected to its output is not affected by the inputs of the gate.

Analog

A type of quantity that is represented by a CONTINUOUSLY VARIABLE, proportional indicator.

Shift Register

A type of storage function that MOVES AND STORES DATA each time it is clocked

Data

GROUP OF BITS that conveysome type of digital information

minterm

In an active-high output decoder, the output whose value is logic 1 represents what kind of term of the binary number currently available in the input lines.

Flip-Flop

It is a BISTABLE (TWOSTABLESTATES) logic circuit that can store only one bit at a time, either 1 or 0.

Digital Systems

It is a COMBINATION OF DEVICES that are designed to manipulate logical information or physical quantities that are represented in DIGITAL FORM.

Code

It is a SET OF BITS that arrangedin unique pattern and are usedtorepresent specified digital information.

Computer

It is a SYSTEM OF HARDWARE that perform arithmetic operations, manipulates data, and makes decisions

AND Operation

The PARTIAL PRODUCT OPERATIONS in a binary multiplier are IDENTICAL TOTHISLOGICAL OPERATION.

A x B

The number of AND gates needed for a multiplier circuit having A-multiplier bits and B-multiplicand bits.

Two

The number of EXOR gates required to produce difference value of a full-subtractor

A + B

The number of product bits for an A-multiplier bits by B-multiplicand bits

Quantities/Quantity

These PARAMETERS are often MEASURED, MONITORED, RECORDED, manipulated arithmetically, observed, or in some way utilized in physical systems.

Clock

This is the BASIC TIMING SIGNAL that is an example of a periodic wave.

Frequency

This is the RATE at which a digital periodic wave form repeats itself.

Timing Diagram

Used to show the LOGICAL RELATIONSHIP BETWEENDIGITAL WAVEFORMS

Moore Model

a category of finite state machine whose OUTPUT SHALL NEVERBE UNDER THE DIRECT INFLUENCE of the external input signals

Mealy

a category of finite state machines whose next state is a function of both the internal flip-flop's present state and also controlled by additional input signals

Toggle

a feature or condition that DISTINGUISHES THE J-K FLIP-FLOP FROM S-R FLIP-FLOP.

contention

a number of tri-state outputs can be connected with wires to form a common line without resulting to this term denoting conflict of outputs

Counter

a state machine that is considered as a sequential circuit because they have a regular numeric count sequence of states that could repeat or stop automatically at some predetermined state.

Sequential

a system whose behavior can be defined from the knowledge that it employs signals that affect the storage elements at discrete instant of time.

Gray counter

a type of counter that exhibits that properly that only a single bit of the counter value changes at a time

Digital

a type of quantity that is represented not by continuously variable indicators but by symbols called DIGITS.

Sequential Logic Circuits

branch of digital logics which refers to operations that need some form of memory device.

Moebius Counter

category of counter which consists of complementing flipflops

Mealy Model

changes its output on the basis of its present state and current input. (Kabaligtaran ng moore)

Pulse Periodic Waveform

composed of pulses that REPEATS IN FIXED INTERVALS CALLED PERIOD.

Priority Encoder

includes the necessary logic to ensure that when two or more inputs are activated, the output code will correspond with the HIGHEST MINTERM

Total Propagation

it is equal to the PROPAGATION DELAY OF A TYPICAL GATE, TIMES THE NUMBER OF GATE levels in circuit

Code Converter

logic circuit that changes data presented in ONE TYPE OF BINARY CODE TO ANOTHER TYPE OF BINARY CODE to make the two systems compatible.

Binary Encoder

logic circuit that has 2^N INPUT LINES OR LESS, only one of which is activated at a given time. Distributor - Another term of Demux

Digital Waveform

made up of a SERIES OF PULSES that switch BETWEEN LOW AND HIGH.

6 (2 bits * 3 bits)

number of AND gates required for 2-bit multiplier and 3- bit multiplicand.

2

number of EXOR gates required to produce the difference value of a full- subtractor.

Eight (4 bits per digit)

number of binary digits for two digit BCD

4

number of flip-flops required to construct a synchronous decade counter.

00

state of two ripple type shorted JK inputs at the 4th pulse.

15 (1111)

the decimal equivalent of the largest number that can be stored in a 4-BIT BINARY COUNTER

2^n

the number of states that a switch- tail ring counter produces

8

the number of stats that a switch-tail ring counter produces.

High-Impedance State

the state of the tristate logic when it BEHAVES LIKEANOPEN CIRCUIT.

Decade counter

the term used to describe the BCD counter

2kHZ

the value of final output frequency or a series of four ripple-type J-K flip-flops with their J-K inputs tied HIGH when the input frequency to the first flip-flop is 32 kHz

Asynchronous input

they are control inputs that operate independently of the synchronous inputs and clock inputs of the flip flop and be used to set the flip flop to the 1 state or clear/reset the flip flop to the 0 state at any time, regardless of the conditions at the other inputs.

Register

this is a storage type of sequential logic circuit which have group of flip-flops, each one of which shares a common clock.

8/Eight

this is the number of possible states that a 3-bit asynchronous counter could have.