| 327 / | HD | MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS |
| 100 | DF | SIGNAL CONVERTING, SHAPING, OR GENERATING {29} |
| 141 | DF | .~ Synchronizing {7} |
| 144 | DF | .~.~ Using multiple clocks {5} |
| 152 | ![]() | .~.~.~ With choice between multiple delayed clocks |