These 4 problems refer to the common-emitter amplifier shown below. Assume the DC circuit has been designed to give the small-signal parameters gm = 10 mS and r, (r_pi) = 10 k with (beta) = 100. You can neglect R, ro and R, in these problems.
VCC
RC
R2
vo
RE
R1
You don't need to solve for R, and R, in this exam, but if you did, how would you go about it?
) (i) Choose Rp to satisfy Rin, then choose R, and R to satisfy Rp = R||R
O (ii) Find VEQ = IgRp + VE + IE(RE + R4), then choose R, and R to satisfy VEQ= R1 Vcc R1+R2
(iii Choose Rp= R||R, to satisfy Rin, then set R, = R, to set the bias point in the middle of the power supply range
iv Simultaneously solve the conditions in (i) and (ii