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Early models displayed vacuum tube curves; later ones were of course aimed at measuring transistors, diodes, and other solid-state devices. Plug-ins for Tek 5000- & 7000-series scopes ... most easily ...
Figure 1 shows the addition of a diode in series with the Zener diode. The curve in Figure 1 plots the temperature coefficient for various Zener voltages. Above values of 4.7V, the temperature ...
Instead of these exotic current limiting diodes, he could have used a current source or current sink consisting of an PNP or NPN transistor respectively, a (zener) diodes, and 2 resistors.
Oh, and finally, note that some Zener/Avalanche diodes will exhibit negative resistance, at some narrow portion of their operating curve (One researcher has indicated that between 75 and 80 ...
Series troubleshooting: Bypass diodes fail regularly, ... Measurements of I-V curves or similar tests on each string or module are too costly at this stage.
The first curve tracer, the 570, was introduced to display characteristic curves for vacuum tubes, followed over the years by models for testing transistors, diodes and other solid-state devices.