Advanced Qualification · A-002 Advanced components and circuits · A-002-004-003
Why do many MOSFET devices have built-in gate protective Zener diodes?
- AThe gate-protective Zener diode prevents the gate insulation from being punctured by small static charges or excessive
- BThe gate-protective Zener diode keeps the gate voltage within specifications prevent the device from overheating
- CThe gate-protective Zener diode protects the substrate from excessive voltages
- DThe gate-protective Zener diode provides a voltage reference to provide the correct amount of reverse-bias gate voltage
Correct answer: A — The gate-protective Zener diode prevents the gate insulation from being punctured by small static charges or excessive. From the official ISED question bank, verified word for word.
Why
The built-in Zener diode acts as a safety valve that clamps voltage spikes, stopping tiny static shocks or excessive voltage from tearing through the incredibly thin insulating layer on the gate. The full explanation — and one for every question — is in Pro.
Practise this section
Advanced components and circuits is section A-002 of the Advanced exam: Advanced components and circuits: semiconductors, amplifier classes, oscillators, mixers, filters and digital logic.
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