(a) In the text Q1 and Q2 are assumed to be matched with F2 5 200. Consider a particular op amp sample having F1 5 175 and F2 5 225. What are IP, IN, IB, and IOS? (b) What is the range of allowed values for F1 and F2 if we wish to ensure IB # 50 nA and IOS # 5 nA? (c) Nominally, Q3 and Q4 have F3 5 F4 5 50. Suppose that because of a fabrication glitch a certain 741 sample has F3 5 F4y2 5 25. Use the defi nition of VOS1 of (a) to show that this mismatch produces an input offset voltage, and calculate it.
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