Consider the telescopic op amp designed in Example 9.5 and repeated in Fig. 9.43 with bias current mirrors. Suppose suffers from a 1% current mismatch with respect to , producing mA rather than 3 mA. Assuming perfect matching for other transistors, explain what happens in the circuit.
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For the circuit of Fig. 9.9, explain in which region each transistor operates as varies from below to above .