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  2. 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.

  3. Gummel–Poon model - Wikipedia

    en.wikipedia.org/wiki/Gummel–Poon_model

    Bell System Technical Journal, v49: i5 May-June 1970 on archive.org; Designers-Guide.org comparison paper Xiaochong Cao, J. McMacken, K. Stiles, P. Layman, Juin J. Liou, Adelmo Ortiz-Conde, and S. Moinian, "Comparison of the New VBIC and Conventional Gummel–Poon Bipolar Transistor Models," IEEE Trans-ED 47 #2, Feb. 2000.

  4. Smith chart - Wikipedia

    en.wikipedia.org/wiki/Smith_chart

    Using the Smith chart, the normalised impedance may be obtained with appreciable accuracy by plotting the point representing the reflection coefficient treating the Smith chart as a polar diagram and then reading its value directly using the characteristic Smith chart scaling. This technique is a graphical alternative to substituting the values ...

  5. Current–voltage characteristic - Wikipedia

    en.wikipedia.org/wiki/Current–voltage...

    A current–voltage characteristic or I–V curve (current–voltage curve) is a relationship, typically represented as a chart or graph, between the electric current through a circuit, device, or material, and the corresponding voltage, or potential difference, across it.

  6. High-voltage direct current - Wikipedia

    en.wikipedia.org/wiki/High-voltage_direct_current

    A block diagram of a bipolar HVDC transmission system, between two stations designated A and B. AC – represents an alternating current network CON – represents a converter valve, either rectifier or inverter, TR represents a power transformer, DCTL is the direct-current transmission line conductor, DCL is a direct-current filter inductor ...

  7. Widlar current source - Wikipedia

    en.wikipedia.org/wiki/Widlar_current_source

    A Widlar current source is a modification of the basic two-transistor current mirror that incorporates an emitter degeneration resistor for only the output transistor, enabling the current source to generate low currents using only moderate resistor values.

  8. Bipolar Disorder: 4 Types & What You Need to Know About Them

    www.aol.com/bipolar-disorder-4-types-know...

    Bipolar disorder can also involve depressive episodes, which have the same symptoms that people with major depressive disorder experience. Symptoms of a depressive episode can include:

  9. Bipolar electrochemistry - Wikipedia

    en.wikipedia.org/wiki/Bipolar_electrochemistry

    Bipolar electrochemistry is a phenomenon in electrochemistry based on the polarization of conducting objects in electric fields. Indeed, this polarization generates a potential difference between the two extremities of the substrate that is equal to the electric field value multiplied by the size of the object.