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  2. BC548 - Wikipedia

    en.wikipedia.org/wiki/BC548

    This group of NPN transistors share many specifications and characteristic curves, but differ in voltage ratings - the BC546 and BC547 are essentially the same as the BC548 but selected with higher breakdown voltages, while the BC549 is a low noise version, and the BC550 is both high-voltage and low-noise. [10]

  3. Varicap - Wikipedia

    en.wikipedia.org/wiki/Varicap

    Popular makeshift varicaps include LEDs, [5] 1N400X series rectifier diodes, [6] Schottky rectifiers and various transistors used with their collector-base junctions reverse biased, [7] particularly the 2N2222 and BC547.

  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. 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. 2N2222 - Wikipedia

    en.wikipedia.org/wiki/2N2222

    NPN silicon transistors with similar properties are also made in a variety of small through-hole and surface mount packages including TO-92, SOT-23, and SOT-223. Replacements for the 2N2222 are commonly available in the cheaper TO-92 packaging, where it is known as the PN2222 or P2N2222, which has similar specifications except for the lower ...

  7. List of semiconductor scale examples - Wikipedia

    en.wikipedia.org/wiki/List_of_semiconductor...

    Listed are many semiconductor scale examples for various metal–oxide–semiconductor field-effect transistor (MOSFET, or MOS transistor) semiconductor manufacturing process nodes. Timeline of MOSFET demonstrations

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