For the BiCMOS amplifier in Fig.5, the BJT has VBE = 0.7V, = 200, the...

 

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For the BiCMOS amplifier in Fig.5, the BJT has VBE = 0.7V, ß = 200, the NMOS has Vm= 1V, kn = 2 mA/V². Assume MOSFET is in saturation (no need to prove) +5 V 100 ΕΩ www 0.1 μF Rin RG = 10 ΜΩ m 6.8 ΚΩ M | 3 ΚΩ a HF 1 μF Figure 5: Circuit of Problem 5 and 6 www -OV 1 kn (a) (10 points) Consider the de bias circuit. Neglect the base current of Q2 in determining the current in Q1. Find the de bias currents in Q1 and Q2. (b) (15 points) Calculate the voltage gain Av = Vo/Vi. Neglect RG for this analysis. For the BiCMOS amplifier in Fig.5, the BJT has VBE = 0.7V, ß = 200, the NMOS has Vm= 1V, kn = 2 mA/V². Assume MOSFET is in saturation (no need to prove) +5 V 100 ΕΩ www 0.1 μF Rin RG = 10 ΜΩ m 6.8 ΚΩ M | 3 ΚΩ a HF 1 μF Figure 5: Circuit of Problem 5 and 6 www -OV 1 kn (a) (10 points) Consider the de bias circuit. Neglect the base current of Q2 in determining the current in Q1. Find the de bias currents in Q1 and Q2. (b) (15 points) Calculate the voltage gain Av = Vo/Vi. Neglect RG for this analysis.