10 Questions
What is the primary function of photodiodes?
To detect photons and sense light
What happens when photons excite carriers in a reverse-biased pn junction?
A very small current proportional to the light intensity flows
How does the sensitivity of photodiodes depend on light?
It depends on the wavelength of light
What is the relation between the current through a phototransistor and the incident light intensity?
The current is directly proportional to the intensity
What is the process by which photodetectors create an electron-hole pair?
Absorption of photons
What is the role of bias voltage in a photodiode?
It moves carriers through the material and induces a current in the external circuit
What is the equation that governs the operation of a photodiode?
The standard diode equation
What is the term for the current that flows through a photodiode when it is not sensing light?
Leakage current
What is the relationship between the photocurrent and the number of electron-hole pairs created?
One electron-hole pair creates one photocurrent
What is the characteristic of phototransistors that distinguish them from photodiodes?
Internal amplification
This quiz covers the basics of photodetectors, including responsivity, photon flux, and output photo current. It also explores the characteristics of silicone-based detectors.
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