tunnel diode


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Related to tunnel diode: Varactor diode, Gunn diode

tunnel diode

n
(Electronics) an extremely stable semiconductor diode, having a very narrow highly doped p-n junction, in which electrons travel across the junction by means of the tunnel effect. Also called: Esaki diode
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Since a tunnel diode is a very low noise device, especially at around 10 mK ambient temperature, the total amplifier noise is not more than any other HEMT based LNA scheme.
Woodall, Gallium arsenide deep-level pin tunnel diode with very negative conductance", Electronics letters, sept., 39(19): (2003)
Brandli, "High-frequency high-power operation of tunnel diodes," IRE Transactions on Circuit Theory, vol.
TABLE I TYPE OF PULSE SOURCES AND THEIR CHARACTERISTICS (5) Best Available Risetime at Type Step/Pulse Amplitude Notes Mercury switch step 70 ps 300 V max PRF = 200 Hz Avalanche transistor pulse 150 ps 12 V device selection necessary Tunnel diode step 25 ps 0.25 V fastest transition time 100 ps 1.0 V 60 ps 20 V commercially available Step recovery step 100 ps 50 V specially ordered 200 ps 200 V four-stack Avalanche diode impulse 400 ps 125 V MHz rep.
As the researchers changed the voltage across the tunnel diode, they observed large fluctuations in current due to the appearance and disappearance of wave function scars.
The model DT1826 is a tunnel diode detector that is offered with either negative or positive output polarity.
The sine qua non of a tunnel diode is an unusual behavior called negative differential conductivity, which means that for a particular range of increasing voltages (when applied across a diode's two terminals) there is a reduction in the current of electrons that tunnel through the energy barrier between the terminals.