257 / | HD | ACTIVE SOLID-STATE DEVICES (E.G., TRANSISTORS, SOLID-STATE DIODES) |
213 | DF | FIELD EFFECT DEVICE {6} |
256 | DF | .~ Junction field effect transistor (unipolar transistor) {15} |
271 | .~.~ Load element or constant current source (e.g., with source to gate connection) |