It is required to derive the expression for vE in Eq. (13.132). Toward that end, note
Chapter 13, Problem 13.87(choose chapter or problem)
It is required to derive the expression for vE in Eq. (13.132). Toward that end, note from the circuit in Fig. 13.43 that vE = vEB7 + vBEN and note that QN conducts a current iN and Q7 conducts a current iC7 given by Eq. (13.131).
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