Example image of eyePlorer eyePlorer map for 'Bipolar junction transistor': Doping (semiconductor) Electronic amplifier Semiconductor Electron Electron hole Molecular diffusion Drift velocity Field-effect transistor Charge carriers in semiconductors Anode Diode P–n junction Charge carrier Depletion region Carrier generation and recombination Gummel–Poon model Photodiode Photon Analogue electronics Bipolar junction transistor Transconductance Translinear circuit SPICE Baker clamp Common emitter Common base CMOS Current source Germanium Silicon Gallium(III) arsenide Electron mobility Electric current Mnemonic HBT Hertz Heterojunction bipolar transistor Radio frequency Early effect Silicon-germanium Drift-field transistor Epitaxy Metalorganic vapour phase epitaxy Molecular beam epitaxy Proportionality (mathematics) Biasing (electronics) Room temperature Electric charge Operational amplifier Bell Labs