M

#### Marco Ferra

- Jan 1, 1970

- 0

After testing the frequency response of the NPN BC337 in the lab I came

across the Miller effect. The gain at high frequencies dropped -3dB at

40.6 KHz. One of the questions of the report was to calculate the

internal parasitic capacitances C-pi and C-miu but it seems that I'm

only able, using Miller's theorem, to calculate the total CT parasitic

capacitance.

Is there a way, knowing the upper corner frequency, to obtain

mathematically and individullay C-pi and C-miu knowing the gain

K = (Vc / Vb) ? (btw this gain is negative because Vc(ac) < 0)

And is there a way, not to estimate the value of Rin, that I am making

Rin = Vb / Ib, but to know accuratly also the values of Rx and R-pi?

If I'm seeing this (what I think I know) in the wrong way please do tell

me.

Sincere regards, Marco