Final answer:
A gated SR latch has Set and Reset inputs and can have an invalid state if both are high. A gated D latch has a singular data input, offering a simpler and more reliable operation by eliminating the possibility of invalid states.
Step-by-step explanation:
The difference between a gated SR latch and a gated D latch lies in their logic and behavior. A gated SR latch has two data inputs, known as Set (S) and Reset (R), as well as a gate input that controls when the latch can change state. When the gate input is active, if S is high and R is low, the latch sets; if S is low and R is high, the latch resets. Both inputs cannot be high at the same time, as this is considered an invalid state. On the other hand, a gated D latch has only one data input called Data (D) and a gate input often referred to as Enable (E). When the enable input is active, the output Q takes the value of the D input. This design eliminates the possibility of an invalid state, making it inherently more stable than an SR latch. In summary, the gated SR latch requires careful handling to avoid invalid states, whereas the gated D latch reliably holds a single bit of data (0 or 1) with a simpler operation mechanism.