BCA NOTES

HELLO EVERYONE, WELCOME TO MY BLOG. TODAY I AM GOIN TO SHOW YOU SOME QUICK NOTES FOR YOUR VIVA,PRACTICALS AND EXAMS.                                                              TOPIC- MULTIPLEXER AND DEMULTIPLEXER     MULTIPLEXER-                                                                    INTRODUCTION                                                                A multiplexer, also known as a data selector, is a device that selects between several analog or digital input signals and forwards the selected input to a single output line. The selection is directed a separate set of digital inputs known as select lines.                                                              OR   A multiplexer is a circuit that accept many input but give only one output. The selection of  a particular input line is controlled by a set of selection lines. Generally, there are 2n input lines and 'n' selection lines wose bit combination determine, wic input is selected. A Block diagram

 Hello everyone,  WELCOME TO MY BLOG.  TODAY  I GOING TO SHOW YOU SOME QUICK NOTES FOR YOUR VIVA, PRACTICALS AND EXAMS ON THE TOPIC- ENCODER, DECODER. INTRODUCTION-  To perform any specific function that can be expressed by a Boolean expression, a combination of logic gates is called a combinational logic circuit. CLASSIFICATIONS OF CIRCUITS - (A) Combinational circuit (B) Sequential circuit ENCODERS- An encoder in digital electronics is a one-hot to binary converter. That is, if there are 2ⁿ input lines, and at most only one of them will ever be high, the binary code of this 'hot' line is produced on the n-bit output lines. Truth Table – As seen from the truth table, the output is 000 when D0 is active; 001 when D1 is active; 010 when D2 is active and so on. Implementation – From the truth table, the output line Z is active when the input octal digit is 1, 3, 5 or 7. Similarly, Y is 1 when input octal digit is 2, 3, 6 or 7 and X is 1 for input octal digits 4, 5, 6 or 7. Hence,