Transistor current gain ß typically falls within what approximate range____________?
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Answer: C. between 20 and 500
Explanation
Transistor current gain beta represents the ratio of collector current to base current in bipolar transistors. Semiconductor manufacturing processes and physical silicon properties limit this practical amplification ratio to a specific span. Standard bipolar junction transistors are specifically designed and rated to have beta values between 20 and 500. Current gain is a fundamental parameter that determines how effectively a transistor can amplify weak signals. Variations in silicon purity and manufacturing tolerances cause beta values to vary widely between individual transistors. Circuit designers must select components carefully because wide beta variations can alter amplifier operating points.
A current gain of 1 describes a common base configuration where current gain is actually slightly less than unity. A gain of less than 1 is characteristic of common collector buffer circuits rather than standard bipolar current gain. Values above 500 exceed standard single transistor ratings and typically require specialized Darlington pair configurations.
- Subject
- Engineering
- Category
- Electrical Engineering
- Topic
- —
- Difficulty
- medium
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