327 / | HD | MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS |
100 | DF | SIGNAL CONVERTING, SHAPING, OR GENERATING {29} |
113 | DF | .~ Frequency or repetition rate conversion or control {3} |
119 | DF | .~.~ Frequency multiplication (e.g., harmonic generation, etc.) {3} |
120 | .~.~.~ With plural outputs {1} | |
121 | DF | .~.~.~.~> Selective |