Consider an amplifier circuit using a transistor.The output power is several times greater than the input power.Where does the extra power come from?
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The extra power come from the external source of power we attach to the amplifier.
- The property of amplifier states that the it is related to the voltage amplifier or current amplifier and also the product of both
- The both quantity are directly proportional to amplifier.
- So the power is the related to the product of above both quantities
- As the current and voltage increases the power also increases.
- Which means if we provide and external source of supply the output of the system get amplified
- But the phase and frequency remain same.
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