*10.106 Figure P10.106 shows an amplifier formed bycascading two CS stages. Note that the input bias voltageis not shown. Each of Q1 and Q2 is operated at an overdrivevoltage of 0.2 V, andVA= 10 V. The transistor capacitancesare as follows: Cgs = 20 fF, Cgd = 5 fF, and Cd b = 5 fF. Thesignal-source resistance Rsig = 10 k.(a) Find the dc voltage gain.(b) Use the method of open-circuit time constants todetermine an estimate for the 3-dB frequency fH

*10.44 The amplifier shown in Fig. P10.44 hasRsig = RL = 1 k, RC = 1 k, RB = 47 k, β = 100,Cμ = 0.8 pF, and fT = 600 MHz. Assume the couplingcapacitors to be very large.(a) Find the dc collector current of the transistor.(b) Find gm and rπ .(c) Neglecting ro, find the midband voltage gain from baseto collector (neglect the effect of RB).(d) Use the gain obtained in (c) to find the component of Rinthat arises as a result of RB. Hence find Rin.(e) Find the overall gain at midband.(f) Find Cin.(g) Find fH