1. The problem statement, all variables and given/known data I need to calculate Vo in the image of the circuit (bitmap image link follows): http://www.filedropper.com/circuit All the information provided is in that diagram - since we are studying differential amplifiers, I assume all the beta values are equal. 2. Relevant equations IC = BIB IE = (B+1)IC V=IR 3. The attempt at a solution I understand that this is a single-sided diff. amp., single-sided, which means I should start with a DC analysis and then replace with an equivalent circuit. However, most examples I have seen (actually, all) have an RE in place of the whole lower transistor circuit...so I don't know how to go about solving for the current, which I would normally get by 12 - 0.7 = IRE. I saw a suggestion that I use ro, but I don't have that value, and don't think I can calculate it. I also saw this described as having a constant current source, but then it hopped over all the steps and I didn't know how to use that knowledge. Any help with a starting point for this question would be greatly appreciated.