Advanced Digital Systems Design

Course Assignment $20\%$

Solve the following questions, and upload your pdf solution on to Moodle. Don't forget to

add your name & ID$,$ and to number your pages.

For each question, show the design, test, and a screenshot of the results.

Q$1$: A carry look ahead generator circuit helps speed the process of adding binary numbers by

calculating the carry bits before the addition process begins. Assuming a $6-$bit adder, and by

using Verilog design and testing:

Show how fast is the carry look ahead compared to the serial adder. Assume that the

propagation delay of any logic gate used $($ AND, NAND, OR$,$ NOR, NOT, XOR, XNOR$)$ is

$10$ns$.$

Test the circuit by performing $3$ tests on adding different numbers of your choice.

Q$2$: A logic circuit is required to detect the presence of five consecutive ones for a serial data

input line. Design this circuit using any type of flipflops of your choice.

Test your circuit using the following input sequence.

$010111110111100$

Random sequence of your choice.

Q$3$: Using counters and other logic devices, design a traffic light that operates as follows: Red

light for $9$ seconds, Orange light for $3$ seconds and green light for $12$ seconds. Assume a clock

frequency of $1Hz.$ Show your work and results by testing the circuit for $60$ seconds

Q$4$: Design a one$-$input, one$-$output serial $2\text{'}$s complementor. The circuit accepts a string of

bits from the input and generates the $2\text{'}$s complement at the output. The circuit can be

reset asynchronously to start and end the operation.

Test your circuit using the following input sequence.

$010111110111100$

Random sequence of your choice. ineed you to slove all question using verlog pleas