A modified D Flip-Flop that attempts to replicate the SR Flip Flop.
- Set
- Reset 
 Can be set as: Can be set as:
- synchronous mode (controled by Clock Signal)
- asynchronous mode (state is independent of clock)
Circuit Diagram

Truth Table
| Output | ||
|---|---|---|
| 0 | 0 | maintain output | 
| 0 | 1 | 0 | 
| 1 | 0 | 1 | 
| 1 | 1 | Toggle |