Question: Recall the 1-bit comparator circuit from your Digital Logic course. The working of 1-bit comparator is as follows: It has two inputs of 1-bit each (a and b). There are three outputs of 1-bit each (L, Eq and G). When both inputs are equal, Eq produces a 1, otherwise it produces a 0. When a is less than b (ab), G produces a 1, otherwise it produces a 0. You have to perform the following tasks: Design the truth table for above and derive the consolidated logic circuit from it. Write the Verilog code for the above circuit using gate-level coding technique. Write the Verilog code for the above circuit using behavioural coding technique. Write the Verilog code for a 4-bit comparator using behavioural coding technique (using if-else or case with vector signals) and then write the Verilog code for an 8-bit comparator using cascaded 4-bit comparators (hierarchical modeling). Hint: You have to first draw the circuit block diagram with 2 4-bit comparators and use some additional logic gates to achieve the operation of 8-bit comparator

Electric Motor Control
10th Edition
ISBN:9781133702818
Author:Herman
Publisher:Herman
Chapter22: Sequence Control
Section: Chapter Questions
Problem 6SQ: Draw a symbol for a solid-state logic element AND.
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Question: Recall the 1-bit comparator circuit from your Digital Logic course. The working of 1-bit comparator is as follows:

  • It has two inputs of 1-bit each (a and b).
  • There are three outputs of 1-bit each (L, Eq and G).
  • When both inputs are equal, Eq produces a 1, otherwise it produces a 0.
  • When a is less than b (a<b), L produces a 1, otherwise it produces a 0.
  • When a is greater than b (a>b), G produces a 1, otherwise it produces a 0.

You have to perform the following tasks:

  1. Design the truth table for above and derive the consolidated logic circuit from it.
  2. Write the Verilog code for the above circuit using gate-level coding technique.
  3. Write the Verilog code for the above circuit using behavioural coding technique.
  4. Write the Verilog code for a 4-bit comparator using behavioural coding technique (using if-else or case with vector signals) and then write the Verilog code for an 8-bit comparator using cascaded 4-bit comparators (hierarchical modeling).

Hint: You have to first draw the circuit block diagram with 2 4-bit comparators and use some additional logic gates to achieve the operation of 8-bit comparator

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