Due Friday 20190208 at the start of class. Submit either on paper or via Blackboard.
1. Amplifier parameters
Treat the circuit of Figure 1, “CB + EF Amplifier” as two amplifiers in cascade.
From the DC bias conditions, compute the 3 main parameters of each subamplifier R_{in}, R_{out}, and opencircuit voltage gain A_{v0}.
Use the Tour Book Tables 4, 5, and 5 to compute these numbers.
Notice that the collector current \(I_C\) in Table 4 is in UPPER_{UPPER} form — the DC value (from hw05
).
Find the following numerical parameters for Figure 3, “Smallsignal amplifier view” that correspond to Figure 1, “CB + EF Amplifier”.
Param  Value (unit) 

R_{in1} 

R_{out1} 

A_{V0_1} 

R_{in2} 

R_{out2} 

A_{V0_2} 

R_{in} (blue) 

R_{out} (blue) 

A_{V} = v_{out} / v_{in} 
2. Simulation
Build a CircuitLab or LTspice simulation of both of Figure 1, “CB + EF Amplifier” and Figure 3, “Smallsignal amplifier view” circuits. Set the component values for Figure 1, “CB + EF Amplifier” to those found in Section 1, “Amplifier parameters”.
Use a DC operating point simulation to verify that the DC node voltages match your hand calculations and measurements from hw05
(.op
in LTspice or DC
in CircuitLab).
Simulate the frequency response of each of the circuits and plot the magnitude of both out
node voltages.
They will be between 35 and 40 dBV and be nearly the same until around 1 MHz where the “real” circuit’s output amplitude begins to decrease.^{[1]}

Turn in a single figure showing the magnitude vs. frequency for both circuits.