Due Wednesday 20180221 at the start of class.
1. Reading
Read [AoE] section 2.3.8 Differential amplifiers starting on page 103.
We will analyze and build several ciruits using differential pairs, ending with a complete operational amplifier (!). That circuit will provide a nice bridge to our next course unit about designing with realworld opamps. We will also begin to make heavy use of the Analog Discovery 2’s advanced features for plotting realtime frequency responses (a.k.a. Bode plots).
2. Handout analysis
Analyze the common emitter circuit from Monday’s handout. 20180919 handout

This document (amplifierterms_CE.pdf) is a much better version of what I wrote on the handout in class. The only difference is that I include the full Z_{E} instead of it being bypassed in the handout with the BFC C_{E}. It is also posted in the Class notes GDrive folder.
Do this analysis using the full circuit analysis and algebra twice, first using the hybrid pi model and then using the T model. Reference Guidebook: § Smallsignal models.
For each circuit, find the following smallsignal quantities:

Amplifier input resistance \(R_{in}\).

Amplifier output resistance \(R_{out}\).

Amplifier opencircuit voltage gain \(\left(A_{v0}=\dfrac{v_{out}}{v_{in}}\bigg\rvert_{R_L \rightarrow \infty}\right)\). This is without R_{load} connected.

Amplifier loaded voltage gain \(\left(A_v=\dfrac{v_{out}}{v_{in}}\right)\). This is with R_{load} connected. This should be easy if you think of Thévenin equivalents.
If you do not get the exact same symbolic results: you are not finished, keep going! For a fun(?) third round, try using the Table 6: BJT amplifier types table and get the same answers.
Rewrite your solutions into the following format:^{[1]}

One side of writing per page.

One column of intermixed schematic, math, and text.

Nearzero crossouts or erase marks.