The automatic gain control circuit in figure is used to limit the trans-conductance, io/vin. (a) Find an
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The automatic gain control circuit in figure is used to limit the trans-conductance, io/vin.
(a) Find an expression for vo in terms of vin, RG, and RL.
(b) Express the asymptotic trans-conductance, io/vin, in terms of RG and RL at vin = 0 and as vin approaches infinity. Given RL and RG values in the circuit diagram, what are the values of the asymptotic trans-conductance?
(c) What are the consequences of your results in (b)?
(d) If vin must be no more than VCC for proper operation, what is the minimum trans-conductance for the functionalcircuit?
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