genle 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:

genle 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:

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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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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