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.