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  2. 2N3904 - Wikipedia

    en.wikipedia.org/wiki/2N3904

    The 2N3904 is a common NPN bipolar junction transistor used for general-purpose low-power amplifying or switching applications. [1] [2] [3] It is designed for low current and power, medium voltage, and can operate at moderately high speeds. It is complementary to the 2N3906 PNP transistor. Both types were registered by Motorola Semiconductor in ...

  3. 2N3906 - Wikipedia

    en.wikipedia.org/wiki/2N3906

    The 2N3906 is a commonly used PNP bipolar junction transistor intended for general purpose low-power amplifying or switching applications. [1] [2] It is designed for low electric current and power and medium voltage, and can operate at moderately high speeds. It is complementary to the 2N3904 NPN transistor. [3]

  4. Extrinsic semiconductor - Wikipedia

    en.wikipedia.org/wiki/Extrinsic_semiconductor

    The most common BJTs are NPN and PNP type. NPN transistors have two layers of n-type semiconductors sandwiching a p-type semiconductor. PNP transistors have two layers of p-type semiconductors sandwiching an n-type semiconductor. Field-effect transistors (FET) are another type of transistor which amplify current implementing extrinsic ...

  5. BC108 family - Wikipedia

    en.wikipedia.org/wiki/BC108_family

    BC108 family transistors from various manufacturers (ITT, CEMI, SGS-ATES, Siemens) The BC107 , BC108 and BC109 are general-purpose low power silicon NPN bipolar junction transistors found very often in equipment and electronics books/articles from Europe, Australia [ 1 ] and many other countries from the 1960s.

  6. 2N3055 - Wikipedia

    en.wikipedia.org/wiki/2N3055

    The 2N3055 is a silicon NPN power transistor intended for general purpose applications. It was introduced in the early 1960s by RCA using a hometaxial power transistor process, transitioned to an epitaxial base in the mid-1970s. [1]

  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. Open collector - Wikipedia

    en.wikipedia.org/wiki/Open_collector

    The NPN BJT (n-type bipolar junction transistor) and nMOS (n-type metal oxide semiconductor field effect transistor) have greater conductance than their PNP and pMOS relatives, so may be more commonly used for these outputs. Open outputs using PNP and pMOS transistors will use the opposite internal voltage rail used by NPN and nMOS transistors.

  9. 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 ...

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