Please answer all questions and show all work. Thank you. Refer to Figure L4.5.
ID: 1808646 • Letter: P
Question
Please answer all questions and show all work. Thank you.
Refer to Figure L4.5. Assume that R = 220 k ohm in the circuit. Assuming that VBE = 0.6V. Estimate IB. Further assuming that the DMM measures a collector current of Ic = 2.94mA. estimate beta . Refer to Figure L4.6. Assume that VBE 0.6V. Assuming that the "load does not have too high a resistance, analytically calculate the expected collector current IC. Calculate the analytic estimate for the voltage gain of the common-emitter amp in Figure L4.7. Referring to Figure L4.7, estimate Rin analytically and use it to estimate the low-frequency 3dB point. Note that Rin includes the effects of both the bias resistors and the base impedance. Assume that hfe = 100.Explanation / Answer
section 4.5
5 -220iB-vbe =0
iB = (5-.6)/2200 = 0.02 mA
ic =2.94 mA
=ic/iB = 147