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A Q D Q Y K Q' Q' B.

A Q D Q Y K Q' Q' B.

Database System Concepts
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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Complete the truth table for the following sequential circuit:

 

This is a digital logic circuit diagram featuring two flip-flops and an OR gate. 1. **Inputs and Symbols**: - Inputs are labeled as X and Y. - A clock signal is present, indicated by a series of square waves at the bottom left. 2. **Components**: - The first flip-flop is a JK flip-flop, with inputs labeled J and K. Its outputs are Q and Q' (complement of Q). - The second flip-flop is a D flip-flop with an input labeled D and outputs Q and Q' as well. - There is an OR gate with two inputs and one output positioned between the JK and D flip-flops. 3. **Connections**: - Input X is connected to both the J input of the JK flip-flop and as an input to the OR gate. - Input Y passes through a NOT gate (triangle with a small circle) before connecting to the K input of the JK flip-flop. - The Q output from the JK flip-flop serves as the other input to the OR gate. - The output from the OR gate connects to the D input of the D flip-flop. - Q output of the D flip-flop is labeled as output B. - The Q' output from the D flip-flop feeds back as input A, which serves as one input to the OR gate. - The clock signal drives both flip-flops, indicating synchronized operation. This diagram exemplifies a sequential circuit where the state of the system depends on both current inputs and past states, commonly used in computing and digital systems for state storage and operations based on timing signals.
Transcribed Image Text:This is a digital logic circuit diagram featuring two flip-flops and an OR gate. 1. **Inputs and Symbols**: - Inputs are labeled as X and Y. - A clock signal is present, indicated by a series of square waves at the bottom left. 2. **Components**: - The first flip-flop is a JK flip-flop, with inputs labeled J and K. Its outputs are Q and Q' (complement of Q). - The second flip-flop is a D flip-flop with an input labeled D and outputs Q and Q' as well. - There is an OR gate with two inputs and one output positioned between the JK and D flip-flops. 3. **Connections**: - Input X is connected to both the J input of the JK flip-flop and as an input to the OR gate. - Input Y passes through a NOT gate (triangle with a small circle) before connecting to the K input of the JK flip-flop. - The Q output from the JK flip-flop serves as the other input to the OR gate. - The output from the OR gate connects to the D input of the D flip-flop. - Q output of the D flip-flop is labeled as output B. - The Q' output from the D flip-flop feeds back as input A, which serves as one input to the OR gate. - The clock signal drives both flip-flops, indicating synchronized operation. This diagram exemplifies a sequential circuit where the state of the system depends on both current inputs and past states, commonly used in computing and digital systems for state storage and operations based on timing signals.
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