SEQUENTIAL CIRCUITS INTRODUCTION

SEQUENTIAL CIRCUITS INTRODUCTION

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1. SEQUENTIAL CIRCUITS INTRODUCTION

2. Today's Topic Sequential Logic Circuits Introduction

3. Introduction to topic Combinational circuit: It produces an output based on present input variables only The previous state of input does not have any effect on the present state of the circuit The combinational circuit does not use any memory. Sequential circuit  produces an output based on  current input and previous input variables . 

4. Sequential circuit Sequential circuit  produces an output based on  current input and previous input variables .  A  Sequential circuit  combinational logic circuit that consists of inputs variable (X), logic gates (Combinational/Computational circuit), output variable (Z) and Memory elements.

5. The word “Sequential” means that things happen in a “sequence”, one after another. The clock signal actually determines about the things will happen next. Simple sequential logic circuits can be constructed from standard  Bistable  circuits such as: Flip lops, Latches  and Counters 

6. Types of Sequential Circuits There are two types of sequential circuit : Asynchronous sequential circuit  Synchronous sequential circuit  Asynchronous sequential circuit  Synchronous sequential circuit   1. Do not use a clock signal 1. Uses a clock signal 2. Faster  than synchronous sequential 2. They wait for the next clock pulse circuits because there is no clock pulse to arrive, to perform the next and change their state immediately operation, so these circuits are when there is a change in the i /p signal bit  slower  compared to async .

7. In Next Class Flip Flops Latches Counters

8. A