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Say I need to do analysis on the differential circuit here:
Each transistor will have Ibias/2 worth of current. Now in the solutions manual I am looking at, they initially treat the mosfets as ideal (not having channel length modulation). So the gm of each mosfet is determined by Ibias/2, then they use r0 to calculate output resistance. But in reality wouldn't a portion of Ibias/2 get consumed by r0, so the current that determines gm would actually be a little lower?
Each transistor will have Ibias/2 worth of current. Now in the solutions manual I am looking at, they initially treat the mosfets as ideal (not having channel length modulation). So the gm of each mosfet is determined by Ibias/2, then they use r0 to calculate output resistance. But in reality wouldn't a portion of Ibias/2 get consumed by r0, so the current that determines gm would actually be a little lower?
