Consider a CS amplifier loaded in a current source with an output resistance equal to ro
Chapter 10, Problem 10.64(choose chapter or problem)
Consider a CS amplifier loaded in a current source with an output resistance equal to ro of the amplifying transistor. The amplifier is fed from a signal source with Rsig = ro/2. The transistor is biased to operate at gm = 2 mA/V and ro = 20 k; Cgs = Cgd = 0.1 pF. Use the Miller approximation to determine an estimate of fH . Repeat for the following two cases: (i) the bias current I in the entire system is reduced by a factor of 4, and (ii) the bias current I in the entire system is increased by a factor of 4. Remember that both Rsig and RL will change as ro changes.
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