Answered: Modulo-4 Clock Counter Q2 (MSB) D (LSB)…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Four LED are arranged at the corners of a diamond, as illustrated in Figure P7.88. When logic 1 is applied to an LED, it lights. Only one diode is to be on at a time. The on state should move from diode to diode either clockwise or counterclockwise, depending on whether S is high or low, respectively. One complete revolution should be completed in each two-second interval. a. What is the frequency of the clock? b. Draw a suitable logic circuit for the counter. c. Construct the truth table and use Karnaugh maps to determine the minimum SOP expressions for D 1 through D 4 in terms of S, Q 1 and Q 2.

Modulo-4
Clock
Counter
Q2 (MSB)
D
(LSB) Q
(Logic 1)
+V•
Logic
Da
S=0: Counterclockwise (1, 2, 3, 4, 1,...)
S = 1: Clockwise (1, 4, 3, 2, 1,...)
Figure P7.88
3.

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