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English: Band diagram of a backward diode. Energy of an electron is on the vertical axis, position in the device is on the horizontal axis. The backward diode has the unusual property that the so-called reverse bias direction actually has more current flow than the so-called forward bias.
The backward diode has the unusual property that the so-called reverse bias direction actually has more current flow than the so-called forward bias. The forward I–V characteristic is the same as that of an ordinary P–N diode. The breakdown starts when reverse voltage is applied. In the case of Zener breakdown, it starts at a particular ...
English: Diode I-V diagram. Includes three main areas of operation: breakdown, reverse-biased, and forward-biased. Vbr denotes the breakdown voltage, and Vd denotes the voltage that is typically considered "on" (conducting current).
English: Thermionic effect diode under reverse bias (retarding potential or retarding diode), useable for measuring the work function of the cold collector. Date 17 June 2013, 21:31:00
Diagram of a simple circuit with an inductance L and a flyback diode D.The resistor R represents the resistance of the inductor's windings. A flyback diode is any diode connected across an inductor used to eliminate flyback, which is the sudden voltage spike seen across an inductive load when its supply current is suddenly reduced or interrupted.
Under a high reverse-bias voltage, the p-n junction's depletion region widens which leads to a high-strength electric field across the junction. [2] Sufficiently strong electric fields enable tunneling of electrons across the depletion region of a semiconductor , leading to numerous free charge carriers .
A normally-bound electron (e.g., in a bond) in a reverse-biased diode may break loose due to a thermal fluctuation or excitation, creating a mobile electron-hole pair . If there is a voltage gradient (electric field) in the semiconductor, then the electron will move towards the positive voltage while the hole will move towards the negative voltage.
Under zero- or reverse-bias (the "off" state), a PIN diode has a low capacitance. The low capacitance will not pass much of an RF signal. Under a forward bias of 1 mA (the "on" state), a typical PIN diode will have an RF resistance of about 1 ohm, making it a good conductor of RF. Consequently, the PIN diode makes a good RF switch.