Learning outcomes part 8A
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a transistor (npn) can be used as an amplifier.
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a small base current will control a larger collector current and that this is the basis of amplification.
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the base current is large enough, the transistor behaves as a switch such that the current in the collector can be turned on and off.
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a transistor can be used as an oscillator to generate audio and radio frequencies.
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Know the difference between a crystal oscillator and a variable frequency oscillator (VFO) based on a tuned circuit.