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Electronics and Communication Engineering - Electronic Devices and Circuits - Discussion

Discussion Forum : Electronic Devices and Circuits - Section 11 (Q.No. 37)
Electronic Devices and Circuits
37.
The O/P Power of a power amplifier is several times its input power. It is possible because
power amplifier introduces a -ve resistance
there is +ve feed back in the circuit
step up transformer is use in the circuit
power amplifier converts a part of I/P d.c. power into a.c. power
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