problem7 - Digital Electronics Tutorial Sheet 7 1 What...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Digital Electronics Tutorial Sheet 7 1.* What values do the following numbers have if they are (a) unsigned and (b) signed? 0101 1101 1111 00100000 11011111 01111110 10000000 2.** Explain why the method presented in the lectures for negating a signed number fails for the maximum negative number in a 2's complement system. 3.* Design a half adder using only NAND gates 4.* Design a full adder using 2 half adders and an OR gate. 5.** Construct the truth table for a 7 segment display decoder to display the hex character set 0, 1, 2, . .., F. 6.** What is the range of possible results from (a) adding and (b) multiplying two N-bit signed numbers? How many bits are required to represent the answer in each case ? 7.** There exists an alarm clock made in the shape of a cube whose alarm is turned off by turning the whole clock upside-down. When you do this, the time display also inverts itself so that you can still read the time. Using the standard circuits you have met in lectures, design the circuitry
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/25/2008 for the course EEE E1.x taught by Professor Cheung during the Fall '07 term at Imperial College.

Page1 / 2

problem7 - Digital Electronics Tutorial Sheet 7 1 What...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online