Your Name: __________________________ SID Number: _______________________
Quiz 2 Page 1 of 6 CS 150 - Sp. 97
BERKELEY
• DAVIS
• IRVINE
• LOS ANGELES
• RIVERSIDE
• SAN DIEGO
• SAN FRANCISCO
UNIVERSITY OF CALIFORNIA AT BERKELEY
SANTA BARBARA
• SANTA CRUZ
Department of Electrical Engineering
and Computer Sciences CS 150 - Spring 1997
Prof. A. R. Newton
Quiz 2
Room 10 Evans Hall, 2:10pm Tuesday April 8th
(Open Katz only, Calculators OK, 1hr 20mins)
Include all final answers in locations indicated on these pages and in pen. Use space provided for all working. If necessary, attach
additional sheets by staple at the end. BE SURE TO WRITE YOUR NAME ON EVERY SHEET.
1. (a) Convert the BCD coded number below to equivalent decimal form:
1000011101100010.01100101
(b) Convert (271.A)16 to (i) Base 2 and (ii) Base 8 equivalents.
(c) Design a circuit for converting a 4-bit Gray code into its binary equivalent. You may use
AND, OR, XOR, or
inverter gates only. Use as few gates as possible.
(d) Implement a 1-bit full adder using a minimum number of 4-input, two control-line
multiplexers and inverters
only. An inverter counts as 1/5th (20%) of a MUX. Assume complements are not available.
1 (a) (10pts)
1000011101100010.01100101BCD = ___________________10
(b) (10pts)
(271.A)16 = ______________2
______________8
(c) (10pts) Schematic diagram of code converter:
(d) (10pts) Schematic diagram of 1-bit full adder:
(1) /40
(2) /40
(3) /60
TOTAL /140
