Zener diode (AQA A-Level Physics): Flashcards

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Zener diode
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Zener diode

Specialized semiconductor diode with specific breakdown voltage

Zener forward bias behavior

Like standard diode, conducts above threshold voltage

Breakdown voltage (VZV_Z)

Reverse voltage where Zener conducts significantly

Zener voltage in reverse bias at breakdown

Remains constant despite current changes

Minimum Zener operating current

55 mA

Zener as constant voltage source

Stable voltage despite input fluctuations

Zener as voltage reference

Reliable reference for comparison in circuits

Input voltage vs VZV_Z requirement

Vinput>VZV_{\text{input}} > V_Z

Series resistor with Zener purpose

Limits current to safe range

Condition for Zener voltage stability

Operation within specified current range

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