Tunnel diode
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A tunnel diode or Esaki diode is a type of semiconductor diode that has effectively "negative resistance" due to the quantum mechanical effect called tunneling. It was invented in August 1957 by Leo E
1N3716 tunnel diode (with 0.1" jumper for scale)
10 mA germanium tunnel diode mounted in test fixture of Tektronix 571 curve tracer
8–12 GHz tunnel diode amplifier, circa 1970
I vs. V curve of 10 mA germanium tunnel diode, taken on a Tektronix model 571 curve tracer.
Oleg Losev
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Oleg Vladimirovich Losev was a Russian and Soviet scientist and inventor who made significant discoveries in the field of semiconductor junctions and the light emitting diode.
Employees of the Central Radio Laboratory, Leningrad, 1930. Losev is in fourth row, third from left.