# Tutorial 7 - EE 2000 Logic Circuit Design Semester A...

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EE 2000 Logic Circuit Design, Semester A, 2008/09 Tutorial 7 Week 8 (20 th , 22 nd , 23 rd October, 2008) The questions are divided into three levels. Level 1 is the review questions. You should able to answer them after attending the lecture. Level 2 is the problems. You should take a revision of the book before answering them. Level 3 is challenge exercise. They are advanced problems. Please be prepared before the tutorial. Level 1: Review Questions Chapter 4, question 30: Draw the logic diagram of a half subtractor using NOR gates only. Chapter 4, question 35: For the addition of two 4-bit numbers i) How many full adders are required? ii) How many outputs are there? iii) How many inputs are there? Chapter 4, question 38: What is the advantage of look-ahead-carry generator? Level 2: Problems Question I: You have learnt how to construct a BCD-to-Excess-3-Code converter in the lecture. Now, instead of using two-level AND-OR circuit, construct (a) A BCD-to-Excess-3-Code converter using a 4-bit full adder only (b)

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## This note was uploaded on 02/06/2011 for the course EE 2000 taught by Professor Vancwting during the Spring '07 term at City University of Hong Kong.

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Tutorial 7 - EE 2000 Logic Circuit Design Semester A...

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