Tunnel diode
Videos
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.
Curve tracer
Videos
A curve tracer is a specialised piece of electronic test equipment used to analyze the characteristics of discrete electronic components, such as diodes, transistors, thyristors, and vacuum tubes. The
The Type 575 Transistor-Curve Tracer displays the dynamic characteristic curves of both NPN and PNP transistors on the screen of a 5-inch cathode-ray tube. Several different transistor characteristic curves may be displayed, including the collector family in the common-base and common emitter configuration. In addition to the transistor characteristic curves, the Type 575 is used to display dynamic characteristics of a wide range of semiconductor devices." (Tektronix, Catalog, 1967)
Transistor-curve tracer (detail 1)
Transistor-curve tracer (detail 2)
Transistor-curve tracer (parts)