ECET-230 – Digital Circuits and Systems
jabrra
ecet230_w2_homework.docxECET-230 – Digital Circuits and Systems Homework Assignment #2
Name ____________________________
1. When a HIGH is on the output of the decoding circuit below, what is the binary code appearing on the inputs?
2. Write the Boolean equations for each of the following codes if an active-LOW decoder output is required: a. 1101 b. 11011 c. 101010 d. 1110110
3. Write the VHDL text file for a 3-to-8 decoder.
4. ( B ) ( F ) ( D ) ( E ) ( G ) ( C ) ( A ) ( A0 A1 A2 A3 Number Displayed )A 7-segment decoder/driver drives the display below. Using the waveforms shown, determine the sequence of digits that appear on the display.
5. Construct a truth table for an active-LOW output BCD (1-of-10) decoder.
6. Derive the truth table for the Y output in the diagram below.
7. Derive the Boolean equation for the Y output in Problem 7.
8. ( Y ) ( MUX ) ( S0 S1 D0 D1 D2 D3 )For the multiplexer shown below, determine the output for the following input state: D0 = 0, D1 = 1, D2 = 1, D3 = 0, S0 = 1, S1 = 0.
9. Determine the function of the circuit shown below.
10. Write the VHDL text file for the circuit shown in Problem 9.
ECET-230 Homework Assignment #2 Page 1 of 4
