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Digital Principles and System Design - Boolean Algebra and Logic Gates - Glossary Technical Terms: Boolean Algebra and Logic Gates

**GLOSSARY TERMS **

1. **BCD**- Binary
Coded Decimal- Ways to encode the first 10 symbols of the decimal number
system.** **

2.
**Excess-3 code**-
Excess-3 is a non weighted code used to express decimal numbers. The code
derives** **its name from the fact that each binary code is the
corresponding 8421 code plus 0011(3).

3. **Gray code**-
Unit-Distance Codes- Only one bit changes between successive values.** **

4.
**Boolean algebra**- Boolean
algebra is an algebraic structure defined by a set of elements B, together** **with
tw**o
binary operators. ‘+’**-**‘and. ‘**

5. **Minterm **-A
minterm is the product of N distinct literals where each literal occurs exactly
once.** **

6. **Maxterm**-A
maxterm is the sum of N distinct literals where each literal occurs exactly
once.** **

7.
**Logic gate**- Logic gates are the
basic elements that make up a digital system. The electronic gate is a** **circuit
that is able to operate on a number of binary inputs in order to perform a
particular logical function.

8.
**Universal gates **-Universal
gates are the ones which can be used for implementing any gate like** **AND,
OR and NOT, or any combination of these basic gates; NAND and NOR gates are
universal gates.

9.
**Kamaugh map**- K-maps are the
convenient tool for representing switching functions of up to six** **variables.
An n-variable K-map has 2n cells with each cell corresponding to a row of an
n-variable truth.

10.
**1’s complement**-**The
1’s complement of a binary number is the number that results when we all 1’s to
zeros and the zeros to ones.**

** **

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