Basics of DeMultiplexer

Duration: 4 min

This video lesson is available to enrolled students.

Return to /learn/CDAC-C-CAT-COMPLETE-PREPARATION/section-c-digital-electronics/combinational-circuit/demux-decoder-encoder/asset-basics-of-demultiplexer after enrolling

Inside: a video lesson and guided study material.

Module outline

  1. Section A | English: Vocabulary, Comprehension / Reading Comprehension / Unseen Passages (Critical Reasoning) (Paragraph Questions), Preposition, Sentence Correction (Error Correction), Sentence Completion (Fill in the blanks), Articles, Sentence Re-arrangements (Para Jumbles) (Narrative Sequencing), Verbal Analogy (Word Based Analogy)
  2. Section A | Quant Aptitude: Ratio and Proportion (Ratios), Mixture and Alligation, Permutation and Combination, Number System, HCF LCM, Sequence and Series (Series), Speed Time and Distance, Arithmetic, Algebra, Powers and Exponents (Surds and Indices), Average, Age Problems, Percentage, Profit and Loss, Partnership, Time and Work, Simple Interest and Compound Interest, Mensuration and Geometry, Probability, Pipe and Cistern
  3. Section A | Reasoning: Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Data Sufficiency, Calendar, Clock, Blood Relations, Directions (Direction Test), Seating Arrangements, Ranking, Order and Sequence, Puzzle Solving (Puzzles)
  4. Section B | C Programming: C Programming by Yash Sir, Coding Questions by Yash Sir
  5. Section B | Data Structures: Algorithm Analysis, Greedy Algorithms, Time Complexity Analysis, Sorting Algorithms, Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs
  6. Section B | OOP (C++): Object Oriented Programming (OOPS), Programming in C++
  7. Section B | OS: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Threads & Process Creation, Deadlock, Memory Management, Virtual Memory, Disc Scheduling, File Management, Windows OS
  8. Section B | Networking: Introduction to CN, Data Communication, DLL: Access Control, DLL: Flow Control, DLL: Error Control, DLL: Framing, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Net Layer:Routing Protocol, Transport Layer Services, TL: Congestion & UDP, Application Layer, Hardware basics
  9. Section B | AI & Big Data Basics: AI & ML by Arun Sir, Big Data Systems
  10. Section C | Digital Electronics: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits, Number System, Number Representation, Analog-Digital Conversion
  11. Section A, C | Comp. Fundamentals, COA: Basics of COA, Floating Point Rep, Cache Memory Organization, Input Output Organisation, Pipelining, Instr Formats & Modes, Control Unit Design, Register Transfer and Microoperations, Multiprocessors, Programming the Basic Computer
  12. MOCK TEST:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This educational video segment introduces the Demultiplexer (DeMux), a fundamental digital logic component. The instructor defines it as a device that accepts a single input line and routes it to one of several digital output lines, effectively acting as a data distributor. He contrasts it with a Multiplexer (Mux), noting it operates with reverse logic. The lecture visually demonstrates the switching mechanism and then formalizes the structure using a block diagram with 2^n outputs controlled by n select lines. Finally, the instructor outlines practical applications, identifying the DeMux as a combinational circuit used in data communication, serial-to-parallel conversion, and Boolean function generation.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The instructor begins by presenting the definition of a Demultiplexer on the slide, stating it is a device that takes a single input line and routes it to one of several digital output lines. He highlights that a demultiplexer is also called a 'data distributor' and is conceptually the same as a Mux but with reverse logic. To visualize this, a diagram shows a single 'Input' line connected to a switch that can direct the signal to one of four outputs labeled Y0, Y1, Y2, and Y3. The instructor uses a pen to draw a switch symbol over the diagram, underlining the text 'several digital output lines' to emphasize the distribution nature of the circuit. He draws a box around the switch and outputs to represent the device boundary.

  2. 2:00 – 3:45 02:00-03:45

    The lecture advances to the general structure of a demultiplexer, displaying text that explains a demultiplexer of 2^n outputs has n select lines used to select the specific output line. A block diagram labeled 'De-MUX 1x2^n' is shown with an input 'I', outputs ranging from O0 to O(2^n-1), and select lines S0 through Sn-1. The instructor writes '32' next to the outputs and '5' under the select lines to provide a concrete example of a 1x32 demultiplexer requiring 5 select lines. The slide then lists applications, noting that a DeMux is a combinational circuit used in data communication and serial-to-parallel conversion. The instructor underlines 'Boolean function generators' and 'decoder circuits' as main uses, while mentioning that different configurations are available as single integrated circuits (ICs).

The video provides a comprehensive introduction to Demultiplexers, starting with a conceptual definition and visual analogy of a switch. It transitions into a formal block diagram representation, establishing the mathematical relationship where n select lines control 2^n outputs. The lesson concludes by categorizing the DeMux as a combinational circuit and listing its primary applications in data communication, serial-to-parallel conversion, and logic design, specifically within Boolean function generators and decoder circuits, ensuring students understand both the theory and practical implementation.

Loading lesson…