| 327 / | HD | MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS |
| 100 | DF | SIGNAL CONVERTING, SHAPING, OR GENERATING {29} |
| 185 | DF | .~ Particular stable state circuit (e.g., tristable, etc.) {12} |
| 195 | ![]() | .~.~ Negative resistance diode having "N"-shape characteristic on I-V plot (e.g., tunnel diode, backward diode, etc.) |