EC8392 DE Notes

Anna University Regulation 2017 EC8392 DE Notes, Digital Electronics Lecture Handwritten Notes for all 5 units are provided below. Download link for 3rd SEM EC8392 Digital Electronics Lecture Handwritten Notes are listed down for students to make perfect utilization and score maximum marks with our study materials.

Unit -1 EC8392- Digital Electronics

Principle of Duality theorem says,
 Changing each OR sign to an AND sign
 Changing each AND sign to an OR sign
 Complementing any 0 or 1 appearing in the expression

BOOLEAN EXPRESSION:
Boolean expressions are minimized by using Boolean laws and postulates.

MINIMIZATION OF BOOLEAN EXPRESSIONS

Simplify the Boolean expression
F=x′y′z′+x′yz+xy′z′+xyz′ Given
F=x′y′z′+x′yz+xy′z′+xyz′
=x′y′z′+x′yz+xz′(y′+y)
=x′y′z′+x′yz+xz′
=x′yz+ z′(x′y′+x)
= x′yz+z′(x′+x)(y′+x)
F=x′yz+xz′+z′y′

– Sum-of-Products (SOP) Form
– Product-of-Sums (POS) Form

– Each form may contain single variable terms
– May contain complemented and un-complemented terms
– A SOP and POS expression can‟t have a term of more than one variable having an over bar extending over the entire term
• Sum-of-Product (SOP) form: When two or more product terms are summed by Boolean addition, the result is a Sum-of-Product or SOP expression
• Product-of-Sum (POS) form: When two or more sum terms are multiplied by Boolean multiplication, the result is a Product-of-Sum or POS expression
• The Domain of an SOP and POS expression is the set of variables contained in the expression, both complemented and un-complemented.
• A SOP and POS expression can have a single variable term such as A

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EC8392 DE Notes

Anna University 3rd SEM DE Lecture Handwritten Notes