Which diode type is designed with a specific voltage reference (Zener voltage) for regulation?

Which diode type is designed with a specific voltage reference (Zener voltage) for regulation?

• A. LEDs
• B. Rectifier Diodes
• C. Photodiodes
• D. Zener Diodes

Answer: (D)

A Zener diode is designed to have a defined voltage reference when reverse-biased. In the reverse region, it breaks down at a specific Zener voltage, and the voltage across it remains nearly constant even as the current through it changes (within its power limits). This makes it ideal for voltage regulation and as a stable reference in regulators. The other diode types serve different roles: LEDs emit light when forward-biased, rectifier diodes handle power rectification for AC-to-DC conversion, and photodiodes generate current in response to light for sensing. So the diode designed with a specific voltage reference for regulation is the Zener diode.

A Zener diode is designed to have a defined voltage reference when reverse-biased. In the reverse region, it breaks down at a specific Zener voltage, and the voltage across it remains nearly constant even as the current through it changes (within its power limits). This makes it ideal for voltage regulation and as a stable reference in regulators. The other diode types serve different roles: LEDs emit light when forward-biased, rectifier diodes handle power rectification for AC-to-DC conversion, and photodiodes generate current in response to light for sensing. So the diode designed with a specific voltage reference for regulation is the Zener diode.