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  2. Bipolar junction transistor - Wikipedia

    en.wikipedia.org/wiki/Bipolar_junction_transistor

    Simplified cross section of a planar NPN bipolar junction transistor. BJTs consists of three differently doped semiconductor regions: the emitter region, the base region and the collector region. These regions are, respectively, p type, n type and p type in a PNP transistor, and n type, p type and n type in an NPN transistor.

  3. Curve tracer - Wikipedia

    en.wikipedia.org/wiki/Curve_tracer

    The Type 575 Transistor-Curve Tracer displays the dynamic characteristic curves of both NPN and PNP transistors on the screen of a 5-inch cathode-ray tube. Several different transistor characteristic curves may be displayed, including the collector family in the common-base and common emitter configuration. In addition to the transistor ...

  4. Transistor - Wikipedia

    en.wikipedia.org/wiki/Transistor

    The bipolar junction transistor, the first type of transistor to be mass-produced, is a combination of two junction diodes and is formed of either a thin layer of p-type semiconductor sandwiched between two n-type semiconductors (an n–p–n transistor), or a thin layer of n-type semiconductor sandwiched between two p-type semiconductors (a p ...

  5. 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

  6. Insulated-gate bipolar transistor - Wikipedia

    en.wikipedia.org/wiki/Insulated-gate_bipolar...

    An IGBT cell is constructed similarly to an n-channel vertical-construction power MOSFET, except the n+ drain is replaced with a p+ collector layer, thus forming a vertical PNP bipolar junction transistor. This additional p+ region creates a cascade connection of a PNP bipolar junction transistor with the surface n-channel MOSFET. The whole ...

  7. 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.

  8. 2N2907 - Wikipedia

    en.wikipedia.org/wiki/2N2907

    The 2N2907 (PNP) and 2N2222 (NPN) are complementary transistor pairs. [4] Other types of transistors with different properties and connections have different part numbers. The prefix of each part number varies for each physical package type. Pin connections vary with different part numbers.

  9. Texas Instruments Power - Wikipedia

    en.wikipedia.org/wiki/Texas_Instruments_Power

    A TIP31 an NPN bipolar transistor and TIP32 is the complementary PNP transistor. TIP31 transistors are designated as TIP31A, TIP31B, TIP31 to indicate increasing collector-base and collector-emitter breakdown voltage ratings. The TIP31 is packaged in a TO-220 case.

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