D Flip Flop Excitation Table
Her, Qn represents the current state of the flip flop, and Dn represents the current input of the flip flop. Where as Qn+1 represents the next state of the flipflop.
- When the Qn is 0 and the Dn is also 0, then the Qn+1 becomes 0. This situation explains the condition of “hold” state.
- When the Qn is 0 but Dn is 1, then the Qn+1 becomes 1. This situation explains the condition of “reset” state.
- When the Qn is 1 but Dn is 0, then the Qn+1 becomes 0. This situation explains the condition of “hold” state.
- When the Qn is 1 and the Dn is also 1, then the Qn+1 becomes 1. This situation explains the condition of “reset” state.
D Flip Flop
Prerequisite : Introduction to Sequential Circuit
Flip Flop is an electronic device or to be precise a kind of memory component that can hold one bit of data. A flip flop has two states, that is “SET” and “RESET”. Those states are represented with the binary values 0 and 1. The flip flop remains in its current state until its receives a signal that switches it to opposite state. A clock or pulse signal may “trigger” the flip flop to change state.