high frequency

An npn BJT has g m = 38 mA/V, $${C_\mu }\, = {10^{ - 14}}$$ F, $${C_\pi }\, = 4\, \times {10^{ - 13}}\,F$$ and DC current gain $$\beta \, = \,90$$. For this transistor f T and $${f...

The current gain of a bipolar transistor drops at high frequencies because of

The intrinsic impedance of copper at high frequencies is

The transit time of a current carriers through the channel of an FET decides its ____________characteristics.