| 327 / | HD | MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS |
| 100 | DF | SIGNAL CONVERTING, SHAPING, OR GENERATING {29} |
| 178 | DF | .~ Rectangular (e.g., clock, etc.) or pulse waveform amplitude control {2} |
| 180 | ![]() | .~.~ Limiting, clipping, or clamping |