In this episode, we explore the Zener diode and the differences between Zener and avalanche action. Both types of Zener diodes are analyzed on a makeshift curve tracer, while we discuss briefly the differences between quantum tunneling and the avalanche effect. Then we go through a basic example of using the Zener as a voltage reference.
Absolutely. You can use zeners back to back, selecting the appropriate voltage to clip the signal at whatever voltage needed. Good for squaring off an AC signal for zero-crossing detector, or for frequency detection.