Use K mapping to obtain the expression of Example 4-8. This should emphasize the advantage of K

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Use K mapping to obtain the expression of Example 4-8. This should emphasize the advantage of K mapping for expressions containing many terms.


Data from Example 4-8

Refer to Figure 4-8(a), where an analog-to-digital converter is monitoring the dc voltage (VB) of a 12-V storage battery on an orbiting spaceship. The converter’s output is a four-bit binary number, ABCD, corresponding to the battery voltage in steps of 1 V, with A as the MSB. The converter’s binary outputs are fed to a logic circuit that is to produce a HIGH output as long as the binary value is greater than 01102 = 610; that is, the battery voltage is greater than 6 V. Design this logic circuit.


Figure 4-8

A BUD Analog- A to- digital converter ABCD E (c) MSB LSB A B C Logic circuit (a) z = A + BCD C) T 2) 3) (T)

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Digital Systems Principles And Application

ISBN: 9780134220130

12th Edition

Authors: Ronald Tocci, Neal Widmer, Gregory Moss

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