Here in this slides information about all Logic gates with symbol, circuit and truth tables.
Logic gates are devices that can combine multiple inputs at independent logic levels and come up with an output accordingly. There are many kinds of logic gates, and the distinction lies in that each kind processes the inputs differently, and may give different outputs for the same inputs.
The way the logic gate processes different inputs is given in a truth table for that gate, which lists all the possible combinations of inputs next to their outputs. An example is given for a simple one-input gate with the function of giving the opposite logic level at the output to the one at the input. The inputs are given on the left, and the outputs are on the right. Generally, the inputs are called A, B, C, etc., and the output is labelled Q. In this case, there are only two possible inputs, 1 or 0, but logic gates can have any number of inputs.
Originally made for a class presentation in SPM Form 5 - Electronics
The logic gate examples are animated. Since GIFs are not supported in SlideShare, the slide can be downloaded from here:
https://drive.google.com/file/d/1Jeuz1Y9hBZCNMp6JXnb5gC73uiHD-GGR/view?usp=sharing
Here in this slides information about all Logic gates with symbol, circuit and truth tables.
Logic gates are devices that can combine multiple inputs at independent logic levels and come up with an output accordingly. There are many kinds of logic gates, and the distinction lies in that each kind processes the inputs differently, and may give different outputs for the same inputs.
The way the logic gate processes different inputs is given in a truth table for that gate, which lists all the possible combinations of inputs next to their outputs. An example is given for a simple one-input gate with the function of giving the opposite logic level at the output to the one at the input. The inputs are given on the left, and the outputs are on the right. Generally, the inputs are called A, B, C, etc., and the output is labelled Q. In this case, there are only two possible inputs, 1 or 0, but logic gates can have any number of inputs.
Originally made for a class presentation in SPM Form 5 - Electronics
The logic gate examples are animated. Since GIFs are not supported in SlideShare, the slide can be downloaded from here:
https://drive.google.com/file/d/1Jeuz1Y9hBZCNMp6JXnb5gC73uiHD-GGR/view?usp=sharing
INC and DEC Instructions
ADD Instruction
SUB Instruction
NEG Instruction
Implementing Arithmetic Expressions
Flags Affected by Addition and Subtraction
Example Program (AddSub3)
INC and DEC Instructions
ADD Instruction
SUB Instruction
NEG Instruction
Implementing Arithmetic Expressions
Flags Affected by Addition and Subtraction
Example Program (AddSub3)
The following presentation is a part of the level 4 module -- Digital Logic and Signal Principles. This resources is a part of the 2009/2010 Engineering (foundation degree, BEng and HN) courses from University of Wales Newport (course codes H101, H691, H620, HH37 and 001H). This resource is a part of the core modules for the full time 1st year undergraduate programme.
The BEng & Foundation Degrees and HNC/D in Engineering are designed to meet the needs of employers by placing the emphasis on the theoretical, practical and vocational aspects of engineering within the workplace and beyond. Engineering is becoming more high profile, and therefore more in demand as a skill set, in today’s high-tech world. This course has been designed to provide you with knowledge, skills and practical experience encountered in everyday engineering environments.
AND, OR, NOT, EX-OR, EX-NOR, NAND, NOR Gates with description, truth table, circuiy diagram and universal gate. Conversion of universal gate to basic gates
Logic Gates & Related Device. This contains some basic fundamentals about Logic Gates. I hope, this will be helpful to those interested in Digital Electronics.
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Logic Gates, Truth Table, AND Gate
Types of Digital Logic AND Gate, The 2-input and 3-input AND Gate, OR Gate, Types of Digital Logic AND Gate, The 2-input OR gate, The 3-input OR gate, NOT Gate, NAND Gate, The 2-input NAND Gate, The 3-input NAND Gate, NOR Gate, 2-input NOR gate
Just like other gates, XOR gate or Exclusive-OR gate
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www.knowledgescroll.com
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This is usually a difficult topic to grasp for those studying CSEC Physics and I hope this presentation helps to clarify any misconceptions.
By viewing this presentation you should be able to:
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It involves estimating the size and composition of future work force to ensure survival and growth of an organization it determines the specific number of jobs to be filled.
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https://alandix.com/academic/papers/synergy2024-epistemic/
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2. LOGIC GATE
• Actually the term logic is applied to digital circuits used to implement logic
functions. Several kinds of digital logic circuits are the basic elements that
form the building blocks for such complex digital system as the computer.
• The lines connected to each symbols are the inputs and outputs.
• The inputs are on the left of each symbol and the output is on the right.
• A circuit that performs a specific logic operation (AND, OR) is called a logic
gate.
3. THE INVERTER
• The inverter (NOT circuit) performs the operation called inversion or
complementation.
• The NOT operation changes one logic level to the opposite logical level.
When the input is Low, the output is high. When the input is high, the output is
low.
• The inverter changes one logic level to the opposite level. In terms of bits, it
changes a 1 to a 0 and 0 to 1.
4. TRUTH TABLE OF INVERTER
Input Output
0 1
1 0
When a High level is applied to an inverter input, a Low level will appear on its output.
When a Low level is applied to its input, a High will appear on its output.
LOGICAL EXPRESSION OF INVERTER
X = A’
6. THE AND GATE
• An AND gate can have two or more inputs and performs what is know as
multiplication.
• The output of AND gate is high when all inputs are high otherwise all outputs
are low.
7. OPERATION OF AND GATE
• An AND gate produces a HIGH output only when all of the inputs are HIGH.
When any of the inputs is LOW, the output is LOW. Therefore, the basic
purpose of AND gate is to determine when certain conditions are
simultaneously true, as indicated by High levels on all of its inputs, and
produces a High on its output.
Inputs Output
A B X
0 0 0
0 1 0
1 0 0
1 1 1
Logical Symbol Truth Table
12. • To determine the total number of possible combination of binary inputs to a
gate is determined by the following formula.
N=2n
Where N is the number of possible input combinations and n is the number of input
variables.
Example,
Two inputs variables; N=22 = 4 Combinations.
Three inputs variables; N=23 = 8 Combinations.
Four inputs variables; N=24 = 16 Combinations.
13. THE OR GATE
• OR gate can have two or more inputs and performs what is known as logical
addition.
• The output of OR gate is Low when all inputs are low, otherwise all outputs
are high
14. OPERATION OF AN OR GATE
• An OR gate produces a High on the output when any of the inputs is High.
The output is Low only when all of the inputs are Low. Therefore, an OR gate
determines when one or more of its inputs are High and produces a High on
its output.
Logical Symbol
Inputs Output
A B X
0 0 0
0 1 1
1 0 1
1 1 1
Truth Table
19. THE NAND GATE
• The NAND gate is the one of the popular logic element because it can be
used as a universal gate; that is NAND gate can be used in combination to
perform the AND, OR, and inverter operations.
• NAND Gate is constructed by attaching NOT Gate at the output of AND
Gate, hence NAND Gate is called NOT- AND Gate.
• NAND Gate has two or more input and only one output.
• The output of NAND gate is low when all inputs are high, otherwise all outputs
are high.
20. OPERATION OF A NAND GATE
• A NAND gate produces a Low output only when all the inputs are High.
When any of the inputs is Low, the output will be High.
Logical Symbol
Inputs Output
A B X
0 0 1
0 1 1
1 0 1
1 1 0
Truth Table
21.
22. LOGICAL EXPRESSION OF NAND
• It’s logical expression is, X= (AB)’
Inputs
A B
0 0 (0.0)’= 0’=1
0 1 (0.1)’= 0’=1
1 0 (1.0)’= 0’=1
1 1 (1.1)’= 1’=0
23. FOR THREE INPUT NAND GATE
INPUT OUTPUT
X Y Z O=(X.Y.Z)’
0 0 0 1
0 0 1 1
0 1 0 1
0 1 1 1
1 0 0 1
1 0 1 1
1 1 0 1
1 1 1 0
25. THE NOR GATE
• The NOR gate, like the NAND gate, NOR gate is also useful logical element
because it can also be used as a universal gate.
• NOR gate can be used in combination to perform the AND, OR and Inverter
operations.
• NOR Gate is the combination of NOT gate at the output of OR gate, hence
NOR gate is type of NOT-OR gate.
• NOR gate has two or more input and only one output.
• The Output of NOR gate is high when all inputs are low otherwise the output
is low.
26. OPERATION OF NOR GATE
• A NOR gate produces a Low output when any of its inputs is high. Only when
all of it’s inputs are low is the output high.
Logical Symbol
Inputs Output
A B X
0 0 1
0 1 0
1 0 0
1 1 0
Truth Table
27.
28. EXPRESSION OF NOR GATE
• It’s expression is, X=(A+B)’
Inputs
A B
0 0 (0+0)’= 0’=1
0 1 (0+1)’= 0’=0
1 0 (1+0)’= 0’=0
1 1 (1+1)’= 1’=0
29. FOR THREE INPUT NOR GATE
INPUT OUTPUT
X Y Z O=(X+Y+Z)’
0 0 0 1
0 0 1 0
0 1 0 0
0 1 1 0
1 0 0 0
1 0 1 0
1 1 0 0
1 1 1 0
31. THE EXCLUSIVE- OR GATE
• The exclusive-OR gate has a graphical symbol similar to that of the OR gate,
except for the additional curved line on the input side.
• It can take only 2 inputs.
• We can’t construct Ex-OR Gate using three input Ex-OR gate.
• If both inputs are Low or both are High then it produces the output Low or 0.
otherwise it produce the High.
32. TRUTH TABLE
• Logical Symbol
Inputs Output
A B AB’+A’B=X
0 0 0.0’+0’.0 =0+0=0
0 1 0.1’+0’+1=0+1=1
1 0 1.0’+1’.0=1+0=1
1 1 1.1’+1’.1=0+0=0
34. EXCLUSIVE-NOR GATE
• The exclusive-NOR gate is the complement of the exclusive-OR gate, as
indicated by small circle on the output side of the graphic symbol.
• It can take only 2 inputs.
• We can’t construct Ex-NOR Gate using three input Ex-OR gate.
• If both inputs are Low or both are High then it produces the output High or 1.
otherwise it produce the Low output.
35. TRUTH TABLE
• Logical symbol
Inputs Output
A B AB’+A’B=X
0 0 0.0+0’.0’=0+1=0
0 1 0.1+0’+1’=0+0=0
1 0 1.0+1’.0’=0+0=0
1 1 1.1+1’.1’=1+0=1