Sedra & Smith - "Microelectronic Circuits 5th Edition",
one of the most popular undergraduate textbooks and highly-recommended for use in many universities. Considered a bible, a classic, a 5-star publication.
If you can't understand this book, I would be very surprised because it is very lucid, informative and self-explanatory.
Try it! You will not be disappointed, at least very unlikely to be disappointed.
You can understand the DC model of a BJT, for example, Ebers-Moll Model. And, you may attach several parasitic capacitances to the model. Then, if you differentiate the model in the input and output port, you will get the AC model. For example, if you kow Vbe/Ib in the common emitter amplifier, you can get dVbe/dIb, which is the dynamic resistance seen from the input.
You can use orcad to simulate. Actually it is not really hard to simulate CEM. You can easily see DC bias values and AC analysis. Pick up one Transistor and set up biasing resistors and you can start simulate.
This website is quite handy for the analysis fo the CE amp.
**broken link removed**
There is also quite a good book think it was already mentioned before but i highly recommend it. Microelectronic circuits by Sedra and Smith. 5th edition.
After drawing the small-signal model, using Miller's theorem, you would break C_mu (the base-collector capacitance) into a base-emitter and collector emitter components.
Then the 3dB frequency would be :
w_o=1/(RC)
where R is the source resistance of the input signal, and C is the total collector capacitances:
C= C_pi + C_X
where C_X is the Miller component of C_mu in the collector-emitter, which is given by:
C_X= (1+gm R_L)C_mu
where gm is the transconductance, R_L is the load resistance.
plz refer to the books microelectronics circuits by sedra simith and electronics devices by floyd
first study floyd then study sedra simth u then will get a good knowledge