Engineering 103 –UMass Boston

CW 12

(In-Class-Work 12)

Digital and Analog representations and conversions

Find the answers to the following questions (15 min max.)

1.- State the relation between Assembly Code; Programming Language; and Compiler

2.- What is a digital signal? Do an A/D conversion for 2009 with the minimum number of bits, and a D/A conversion for 0101 1010 1101 0010

3.- Do a A/D conversion for 0.5 with 8 bits of information, being 1 the highest number, using no “binary dot” in the binary representation of eight bits; and a second version using a ‘binary dot’ between two groups of four bits, with the second groups using negative decreasing powers of 2 from left two right.

In each team, students working together at a computer numbered between 1 and 10 will submit Word file cw12_XX_a.doc, the next two students will submit Word file cw12_XX_b.doc, to the files folder in the server. These files need to be uploaded to the server today to receive credit. Include your names and dates within the files.

*Remember that this is an individual work (turn it in, as instructed, with your name and date). Home-works and class-works count 20% toward the course grade. Class-works are done in class.