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  2. Electronic symbol - Wikipedia

    en.wikipedia.org/wiki/Electronic_symbol

    An electronic symbol is a pictogram used to represent various electrical and electronic devices or functions, such as wires, batteries, resistors, and transistors, in a schematic diagram of an electrical or electronic circuit. These symbols are largely standardized internationally today, but may vary from country to country, or engineering ...

  3. Diode - Wikipedia

    en.wikipedia.org/wiki/Diode

    The symbol used to represent a particular type of diode in a circuit diagram conveys the general electrical function to the reader. There are alternative symbols for some types of diodes, though the differences are minor. The triangle in the symbols points to the forward direction, i.e. in the direction of conventional current flow.

  4. Diode logic - Wikipedia

    en.wikipedia.org/wiki/Diode_logic

    The diode symbol's arrow shows the forward-biased direction ... Diode-transistor clock. ... During the 1960s the use of tunnel diodes in logic circuits was an active ...

  5. Reference designator - Wikipedia

    en.wikipedia.org/wiki/Reference_designator

    A reference designator unambiguously identifies the location of a component within an electrical schematic or on a printed circuit board.The reference designator usually consists of one or two letters followed by a number, e.g. C3, D1, R4, U15.

  6. Diode–transistor logic - Wikipedia

    en.wikipedia.org/wiki/Diodetransistor_logic

    Schematic of basic two-input DTL NAND gate. R3, R4 and V− shift the positive output voltage of the input DL stage below the ground (to cut off the transistor at low input voltage). Diodetransistor logic (DTL) is a class of digital circuits that is the direct ancestor of transistortransistor logic.

  7. Transistor - Wikipedia

    en.wikipedia.org/wiki/Transistor

    For the BJT, on an n–p–n transistor symbol, the arrow will "Not Point iN". On a p–n–p transistor symbol, the arrow "Points iN Proudly". However, this does not apply to MOSFET-based transistor symbols as the arrow is typically reversed (i.e. the arrow for the n–p–n points inside).

  8. p–n junction - Wikipedia

    en.wikipedia.org/wiki/P–n_junction

    The circuit symbol is also shown. A p–n junction is a combination of two types of semiconductor materials , p-type and n-type , in a single crystal . The "n" (negative) side contains freely-moving electrons , while the "p" (positive) side contains freely-moving electron holes .

  9. Bipolar junction transistor - Wikipedia

    en.wikipedia.org/wiki/Bipolar_junction_transistor

    3D model of a TO-92 package, commonly used for small bipolar transistors. A bipolar junction transistor (BJT) is a type of transistor that uses both electrons and electron holes as charge carriers. In contrast, a unipolar transistor, such as a field-effect transistor (FET), uses only one kind of charge carrier.

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