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Lecture 1

CSE 120 Lecture 1: Logical and Binary Systems, ANDOR, NAND-NOR Logic, Truth Tables, Realizations
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Department
Computer Science and Engineering
Course Code
CSE 120
Professor
Formicone

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CSE 120 Lecture One Notes - Logical and Binary Systems, ANDOR, NAND-NOR Logic, Truth
tables, Realizations
Logical and Binary Systems
Digital circuits process signals that contain just two levels/states
Logic “0”
Logic “1” represents a higher voltage
Typically referred to as a HIGH value
Logic “1”
Logic “0” represents a lower voltage
Typically referred to as a LOW value
Each discrete voltage levels are referred to as Binary Digits or Binary BITS
Binary number system is a Base-2 number system
Follows the same rules as other mathematical systems like Base-10
For example:
Instead of powers of ten (10𝑛) binary numbers use power of two (2𝑛)
ANDOR
This acronym represents two logic gates
AND
OR
AND gate
If 0 is called false and 1 is called true, the gate acts in the same way as a logical
“and” operator
OR gate
Acts in the fashion as a logical “or”
The output is true if either or both of the inputs true
If both are false, then the output will be false as well

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Description
CSE 120 Lecture One Notes Logical and Binary Systems, ANDOR, NANDNOR Logic, Truth tables, Realizations Logical and Binary Systems Digital circuits process signals that contain just two levelsstates Logic 0 Logic 1 represents a higher voltage Typically referred to as a HIGH value Logic 1 Logic 0 represents a lower voltage Typically referred to as a LOW value Each discrete voltage levels are referred to as Binary Digits or Binary BITS Binary number system is a Base2 number system Follows the same rules as other mathematical systems like Base10 For example: Instead of powers of ten (10 ) binary numbers use power of two (2 ) ANDOR This acronym represents two logic gates AND OR AND gate If 0 is called false and 1 is called true, the gate acts in the same way as a logical and operator OR gate Acts in the fashion as a logical or The output is true if either or both of the inputs true If both are false, then the output will be false as well
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