crhu
Junior Member
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I come, I see, and I go
Posts: 11
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Hi, there, I think that we need to clarify which ft you are interested: device(ft) or block(Ft)
All the parameters(Y, H, S, Z, G) depend on the termination, as well as the device. If there is large difference between the device's input impendance and the termination impendance, the Y/H/S/Z/G are dominated by the reflection in the interface, and the Ft calculated from unity current gain, i.e.H21(db)=0 or H21(mag)=1, is far less than ft calculated from gm/(2*pi*Cg,tot).
-ch
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