1. Elevator: Design a logic circuit that controls an elevator door in a three-story ouilding. The circuit in Figure has 4 inputs. M s a logic signal that indicates when he elevator is moving(M=1) or stopped(M=0).F1, F2 and F3 are floor indicator ignals that are normally LOW, and they go HIGH only when the elevator is positioned at the level of that particular floor. For example, when the elevator is ined up level with the second floor F2=1 and F1=F3=0. The circuit output is the OPEN signal, which is normally LOW and will go HIGH when the elevator door is o be open.(if more than one floor indicator goes HIGH then OPEN signal is considered LOW)
1. Elevator: Design a logic circuit that controls an elevator door in a three-story ouilding. The circuit in Figure has 4 inputs. M s a logic signal that indicates when he elevator is moving(M=1) or stopped(M=0).F1, F2 and F3 are floor indicator ignals that are normally LOW, and they go HIGH only when the elevator is positioned at the level of that particular floor. For example, when the elevator is ined up level with the second floor F2=1 and F1=F3=0. The circuit output is the OPEN signal, which is normally LOW and will go HIGH when the elevator door is o be open.(if more than one floor indicator goes HIGH then OPEN signal is considered LOW)
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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![1. Elevator: Design a logic circuit that controls an elevator door in a three-story
building. The circuit in Figure has 4 inputs. M s a logic signal that indicates when
the elevator is moving(M=1) or stopped(M=0).F1, F2 and F3 are floor indicator
signals that are normally LOW, and they go HIGH only when the elevator is
positioned at the level of that particular floor. For example, when the elevator is
lined up level with the second floor F2=1 and F1=F3=0. The circuit output is the
OPEN signal, which is normally LOW and will go HIGH when the elevator door is
to be open.(if more than one floor indicator goes HIGH then OPEN signal is
considered LOW)
M F1 F2 F3
Elevator
circuit
OPEN](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2dd11be0-8cf5-48db-ab9d-d5146077427f%2F3a09a459-05c8-4a15-8536-b4369fd31967%2Fvjps4kr_processed.png&w=3840&q=75)
Transcribed Image Text:1. Elevator: Design a logic circuit that controls an elevator door in a three-story
building. The circuit in Figure has 4 inputs. M s a logic signal that indicates when
the elevator is moving(M=1) or stopped(M=0).F1, F2 and F3 are floor indicator
signals that are normally LOW, and they go HIGH only when the elevator is
positioned at the level of that particular floor. For example, when the elevator is
lined up level with the second floor F2=1 and F1=F3=0. The circuit output is the
OPEN signal, which is normally LOW and will go HIGH when the elevator door is
to be open.(if more than one floor indicator goes HIGH then OPEN signal is
considered LOW)
M F1 F2 F3
Elevator
circuit
OPEN
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