Response to the following question:
An npn differential amplifier with I = 0.4 mA, VCC = VEE = 2.5 V, and RC = 5 kΩ utilizes BJTs with β = 100 and vBE = 0.7 V at iC = 1 mA. Assuming that the bias current is obtained by a simple current source and that all transistors require a minimum vCE of 0.3 V for operation in the active mode, find the input common-mode range.
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