Answered: quence Detector is a circuit which…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

A Sequence Detector is a circuit which given an input string of bits generates an output 1 whenever the target sequence (pattern) has been detected. There are two types of sequence detectors:

Overlapping: The detector allows overlapping, hence the final bits of one sequence can be the start of another sequence.

Non-overlapping: The detector does not allow overlapping, hence a new sequence starts only after the previous sequence is completed.

Ex: Detect pattern 101

For non-overlapping case:

Input :0110101011001

Output:0000100010000

For overlapping case:

Input :0110101011001

Output:0000101010000

Design a sequential circuit (overlapping) with an input ‘x’. The pattern to be detected is the binary number that is equal to 1001100

For example,the circuit detects the sequence 00010 . When the sequence is detected, the detector outputs z=‘1’

For this circuit:

Draw the ASM diagram.
Construct the state table.
Draw the logic circuit for the datapath and control in logisim.

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