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Q. |
Gain of power amplifiers with increase in operating frequency. |
A. | increases |
B. | decreases |
C. | increases exponentially |
D. | decreases exponentially |
Answer» B. decreases | |
Explanation: silicon bipolar junction transistor amplifiers in the cellular telephone band of 800-900 mhz band have power added efficiencies of about 80%. but this efficiency drops quickly with increase in the operating frequency. |
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