Question
Download Solution PDFPhoto transistor is used for:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFPhototransistor
- A Phototransistor is an electronic switching and current amplification component which relies on exposure to light to operate.
- When light falls on the junction, reverse current flows which are proportional to the luminance.
- Phototransistors are used extensively to detect light pulses and convert them into digital electrical signals.
- These are operated by light rather than electric current.
- These devices act like an optoisolator.
- An optoisolator is an electronic component that transfers electrical signals between two isolated circuits by using light.
- Opto-isolators prevent high voltages from affecting the system receiving the signal.
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