The transistor parameters for the circuit in Figure P11.92 are: \(\beta=200\), \(V_{B E}(\mathrm{on})=0.7 \mathrm{~V}\), and \(V_{A}=80 \mathrm{~V}\).

(a) Determine the differential-mode voltage gain \(A_{d}=v_{o 3} / v_{d}\) and the common-mode voltage gain \(A_{c m}=\) \(v_{o 3} / v_{c m}\).

(b) Determine the output voltage \(v_{o 3}\) if \(v_{1}=2.015 \sin \omega t \mathrm{~V}\) and \(v_{2}=1.985 \sin \omega t \mathrm{~V}\). Compare this output to the ideal output that would be obtained if \(A_{c m}=0\).

(c) Find the differential-mode and common-mode input resistances.

Transcribed Image Text:

R = 12 v+= 12 V RC= 18 Rc = 8 k2 102' Q1 Q2 RF = 3.3 k$2 Q4 Qs V-= -12 V Figure P11.92 RC2 = 4 ks2 -0103