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Unformatted text preview: (b) Plot the input (G S ) and the output (G L ) constant-gain circles for 2, 1, 0, and -1 dB. Q3 Data for the HXTR-6101 silicon bipolar transistor at 4 GHz with a 50 ohms reference are: S 11 = 0.522 /-169 o S 12 = 0 S 21 = 0.839 /-67 o S 22 = 1.681 /26 o F min = 3.5 dB Γ opt = 0.475 /166 o R N = 3.5 Ω Draw the F = 3 dB noise figure circle and the G S = 0 dB circle. From these determine the source reflection coefficients, and hence the source impedance required to realize both values. What is the maximum available gain under these conditions?...
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- Spring '11