Chapter 3, Problem 25E

Explanation of Solution

Basic difference:

• The given circuit “2” is a Set/Reset (SR) latch.
• This is the basic difference between the behavioral characteristics of the given circuits.
• The logic diagram for the SR latch is as follows,

• An asynchronous device that works independently of control signals is called SR latch.
• It depends on the state of inputs “S” and “R”.
• In the above diagram, the SR latch can be made with “2” NAND gates that contains cross-feedback loop...

Explanation of Solution

When the voltage at “A” goes from “0” to “1”:

• For the circuit “1”, the output “$\text{D=AB+}\overline{\text{A}}\text{C}$”.
• Hence, when the input voltage  “A’ goes from “0” to “1”, “D” goes from “C” to “B”