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Draw the truth table & excitation table for S-R Flip flop (4m)
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written 5.6 years ago by
teamques10
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SR Flipflop
The SET-RESET flip flop is designed with the help of two NOR gates and also two NAND gates. These flip flops are also called S-R Latch.
Truth Table
| S | R | Q(t+1) |
|---|---|---|
| 0 | 0 | Q(t) |
| 0 | 1 | 0 |
| 1 | 0 | 1 |
| 1 | 1 | Invalid inputs |
Characteristic Equation
Q(t+1) = R'(t)Q(t) + S(t) ; S(t)R(t) = 0
Excitation Table
| Q(t) | Q(t+1) | S | R |
|---|---|---|---|
| 0 | 0 | 0 | x |
| 0 | 1 | 1 | 0 |
| 1 | 0 | 0 | 1 |
| 1 | 1 | x | 0 |
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