6-
11
Figure 6-17. Single Zener Diode 1N5239B and corresponding signature
Figure 6-18. Two Zener Diodes in series and corresponding signature.
Since each horizontal division on the LCD graticule (in 15V,1kΩ
ΩΩ
Ω range) is approximately 3.75
Volts, you can estimate that this is about a 9 volt zener diode. By connecting two Zener diodes in
series, the rated voltage thresholds are doubled.
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