Lecture Notes – Students' Union

Course Content

1. Digital Electronics General View

Digital electronics is the study of digital signal circuits. In contrast to analogue electronics, digital signals use discrete voltages or logic levels.

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(2019/2020) – Lec 1 & 2

2. Number Systems

In digital electronics, information is shown in the form of numbers. There are many different ways to write numbers, but the most common are decimal, binary, octal, and hexadecimal. The number system's base, also called its "radix," is the total number of digits it uses. Suppose that the base of the number system that represents the numbers 0 through 9 is 10.

3. Combinational Logic

Circuits where logic gates are connected to produce a specified o/p for certain i/p combinations without storage.

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(2019/2020) – Combinational Logic

4. Functions of Combinational Logic

Combinational logic combines logic gates to process two or more inputs and generate at least one output based on each logic gate's function.

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(2019/2020) – Subtractors and Comparator

5. Encoders

Encoders combine logic. Inverts Decoder's function. An encoder codes an active signal. Encoder block diagram. It accepts "M" and outputs

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(2019/2020) – Encoders

6. Decoders

A decoder takes binary inputs and turns on only the matching output. Other outputs are useless. There are 2N possible input combinations, and only one output is HIGH (active).

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(2019/2020) – Decoders

7. Multiplexers

Most digital data travels through wires and PCBs. Sending data over parallel lines simultaneously is expensive and requires large cables. Data from multiple lines is combined and sent serially over a single wire to avoid this. The other end is parallel.

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(2019/2020) – Multiplexers & De-Multiplexers

8. De-Multiplexers

Demultiplexing (DEMUX) is the opposite of multiplexing (MUX), which is the process of combining multiple unrelated analogue or digital signal streams into one signal over a single shared medium, such as a single conductor of copper wire or fibre optic cable. So, demultiplexing is the process of turning a signal with multiple analogue or digital signal streams back into the original, separate signals that don't have anything to do with each other.

9. Parity Generator And Checker

Incomprehensible changes to data stored in memory. Depending on the parity error, data may need to be resent or a system crash may occur. The parity bit usually finds errors. A parity bit makes a binary message's total number of ones odd or even. Even parity uses an even number of ones in the coded message. Odd parity makes the number of 1s in a coded message odd.

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(2019/2020) – Parity Generator and Checker

10. Sequential Logic Circuits

In automata theory, sequential logic is a type of logic circuit whose output depends on both its current input values and their past order.

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(2019/2020) – Sequential Logic Circuits

11. Counters and Registers

Counters make patterns. Sandals are Register. Its main job is to store digital information for logic units to use. Registers may have other features.

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12. Digital Integrated Circuits

Digital logic involves connecting digital parts. Integrated circuits contain most digital circuits. Many digital circuits are connected in a small package. This package contains all the circuit parts.

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ELTN 3113 – Digital Electronics

About Lesson

Counters are mostly used to create patterns. Register is a set of sandals. Its main job is to store information in a digital system so that the logic units can use it when they are doing their work. But a register may also have other features.