The differential amplifier in Figure P11.4 is biased with a three-transistor cur?rent source. The transistor parameters are: ? = 100, VBE(on) = 0.7 V, and VA = ?. (a) Determine I1, IC2, IC4, VCE2, and VCE4 (b) Determine a new value of R1 such that VCE4 = 2.5 V. What are the values of IC4, IC2, I1, and R1?

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R₁ = 8.5 ΚΩ 443815 lz Figure P11.4 +5 V 1C₁RC= • 2 kΩ -5 V + Q4 VCEA Rc= ΣΚΩ ¹C₂ www 25 Q2 VCE2 R₁ = 8.5 ΚΩ 443815 lz Figure P11.4 +5 V 1C₁RC= • 2 kΩ -5 V + Q4 VCEA Rc= ΣΚΩ ¹C₂ www 25 Q2 VCE2