Part I: Bipolar Junction Transistors

Problem $1-($Paper Design$)$ DC Bias of BJT in Active Region: $(0-15$ points$)$

For the following circuit in Figure $1,$ bias your transistor such that circuit gain $A_V=(g_m)(R_C)=10($gain of $-10$V$/$V$)$; $R_C$ is the resistance connected at the transistor collector. Fix the collector$-$emitter voltage $V_{CE}$ such that the transistor operates in the active region. Find $I_C,R_C,R_B,V_C,$ and $V_{CE}.$ Assume $=140,V_T=25mV,$ and $V_A=.$

a$)$ Simulate in PSPICE DC bias and show the bias currents and voltages. Compare these to your design predictions.

b$)$ Simulate in Transient; $1kHz,10mV$ peak, DCOFF $=0V,$ run time $=4ms,$ step size $=10us.$

c$)$ Simulate the circuit for AC frequency response analysis. Plot the frequency response of the circuit from $10$ Hz up to $10$ MHz $.$ Use $dB(Vo)$ for the y $-$axis. Find the upper and lower $-3$ dB points on your AC plot.

Example Paper Design:

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