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Contents

Electronic Devices

PN Junction

PN Junction Basics Forward and Reverse Bias Diode Equation Junction Capacitance Breakdown Mechanisms Small Signal Model

BJT Fundamentals

BJT Operation BJT Configurations Current Components Ebers-Moll Model Transistor Switching

FET Fundamentals

JFET Basics MOS Capacitor MOSFET Structure MOSFET Operation MOSFET I-V CMOS Basic

Special Devices

Zener Diode Tunnel Diode Varactor Diode Schottky Diode UJT

Optoelectronics

Light Emitting Diodes Photodiodes Solar Cells Laser Diodes Fiber Optic Sources Phototransistors Optocouplers

Power Devices

Power Diodes Power MOSFETs IGBTs Thyristors GTO and TRIAC

Other Topics

IC Fabrication Basics Nanoelectronics Intro MEMS Single Electron Transistor

Other Subjects

Analog Electronics Digital Electronics Signals & Systems Control Systems Electromagnetic Theory Digital Communication Analog Communication Network Analysis Microprocessors VLSI Design Verilog HDL Power Electronics Embedded Systems DSP

Section Progress29%

2 of 7 articles

Photodiodes

Reverse bias detection, responsivity.

Updated: 19 March 2026

7 min read

Photodiode Detection

Examine reverse bias detection and responsivity.

Question 1 of 3

Q1.Why are photodiodes typically operated in the reverse-biased photoconductive mode for signal detection?

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Phototransistors

High gain optical detection.

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Optocouplers

Isolation applications.

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Fiber Optic Sources

Comparison of LED vs Laser for comms.

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Laser Diodes

Stimulated emission, optical cavity.

10 min read

Forward and Reverse Bias

Energy band diagrams.

7 min read

Light Emitting Diodes