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  2. Bipolar junction transistor - Wikipedia

    en.wikipedia.org/wiki/Bipolar_junction_transistor

    Structure and use of NPN transistor; arrow according to schematic. The diagram shows a schematic representation of an NPN transistor connected to two voltage sources. (The same description applies to a PNP transistor with reversed directions of current flow and applied voltage.)

  3. File:Bjt forward active bands.svg - Wikipedia

    en.wikipedia.org/wiki/File:Bjt_forward_active...

    Energy band diagram of a simple NPN w:bipolar junction transistor in forward-active mode showing electron energy versus position. The w:depletion regions of the emitter-base and base-collector junctions are marked.

  4. File:Bjt equilibrium bands v2.svg - Wikipedia

    en.wikipedia.org/wiki/File:Bjt_equilibrium_bands...

    Energy band diagram of a simple NPN w:bipolar junction transistor under equilibrium showing electron energy versus position. The w:depletion regions of the emitter-base and base-collector junctions are marked.

  5. Common collector - Wikipedia

    en.wikipedia.org/wiki/Common_collector

    Figure 1: Basic NPN common collector circuit (neglecting biasing details).. In electronics, a common collector amplifier (also known as an emitter follower) is one of three basic single-stage bipolar junction transistor (BJT) amplifier topologies, typically used as a voltage buffer.

  6. Transistor - Wikipedia

    en.wikipedia.org/wiki/Transistor

    PNP and NPN Transistor: Metal–oxide–semiconductor field-effect transistor ... A simple circuit diagram showing the labels of an n–p–n bipolar transistor.

  7. Darlington transistor - Wikipedia

    en.wikipedia.org/wiki/Darlington_transistor

    Darlington Transistor (NPN-type) In electronics, a Darlington configuration (commonly called as a Darlington pair) is a circuit consisting of two bipolar transistors with the emitter of one transistor connected to the base of the other, such that the current amplified by the first transistor is amplified further by the second one. [1]

  8. Early effect - Wikipedia

    en.wikipedia.org/wiki/Early_effect

    The expressions are derived for a PNP transistor. For an NPN transistor, n has to be replaced by p, and p has to be replaced by n in all expressions below. The following assumptions are involved when deriving ideal current-voltage characteristics of the BJT [7] Low level injection; Uniform doping in each region with abrupt junctions

  9. Transistor diode model - Wikipedia

    en.wikipedia.org/wiki/Transistor_diode_model

    In a diode model two diodes are connected back-to-back to make a PNP or NPN bipolar junction transistor (BJT) equivalent. This model is theoretical and qualitative. This model is theoretical and qualitative.

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