In the circuit shown you have replaced two NAND gates by NAND gates with three inputs.
![]() Circuit diagram asynchronous inputs SET and RESET of a gated D Latch. |
With these new inputs SET and RESET you can control the state of the gated D latch regardless of the state of the input E ...
![]() Circuit diagram asynchronous inputs SET and RESET of a gated D latch. (Enlarge) |
These inputs are called asynchronous inputs, because you can use them anytime...
To clarify this even more take a look at the next experiment...