# Final Report

Topics: Logic gate, Input, Binary-coded decimal Pages: 4 (1136 words) Published: December 16, 2012
Home Assignment No-4
Subject: Course: Teacher: Digital Logic Design BEE-2CD Arshad Nazir Marks: Issue: Due on: 100 10 Apr 2012 19 Apr 2012

Note: (10:00 AM)  Attempt the given problem set in a sequential order. Show all the design steps.  Make an index on the front page showing summary of the problems solved along-with page numbers and also specify the missing ones.  No late submissions will be accepted unless a prior approval from the teacher has been obtained under extremely genuine reasons. The assignments submitted after due date/time will be graded zero.  University has zero tolerance for plagiarism and serious penalties apply. All assignments found mutually copied will be marked zero and such recurrence will result award of zero out of total assignment weight age.  All the students will submit a certificate with the assignment work stating the originality of their efforts and no copying from others.  Note that Ten Marks are reserved for neat work, table of contents, and certificate to be attached with the assignment work. Problem No-1 Design a code converter that should convert a Hexadecimal digit to 7-bit ASCII code. Show the following design steps:a. b. c. Construct the truth table and write the minterm list equations for each output variable. Simplify each output function using map method. Draw the logic diagram using minimum number of AND, OR, and NOT gates. Assume that only normal inputs are available from the source. Let the AND or OR gates have a propagation delay of 10 ns, and propagation delay of NOT gates be 5ns. What is the total propagation delay time in the converter?

d.

Problem No-2

A BCD to seven-segment decoder is a combinational circuit that converts a decimal digit in BCD to an appropriate code for the selection of segments in a display indicator used for displaying the decimal digit in a familiar form. The seven outputs of the decoder (a, b, c, d, e, f, g) select the corresponding segments in the display, as shown in...