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Gain bandwidth frequency is GBP= 3000 Mhz. The cut-off frequency is f=10Mhz. What is the CE short circuit current gain at the β cutoff frequency?(a) 212(b) 220(c) 300(d) 200This question was posed to me in an international level competition.The question is from High Frequency Response in chapter Transistor Frequency Response of Analog Circuits |
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Answer» RIGHT CHOICE is (a) 212 To EXPLAIN: FT = 3000Mhz βfβ = 3000Mhz β = 3000/10 = 300 A = \(\frac{β}{\sqrt{2}}\) = 212.13. |
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