The circuit and transistor parameters for the circuit shown in Figure P11.11 are V+ - 5 V, V− = −5 V, IQ = 0.2 mA, β = 80, VEB(on) = 0.6 V, and VA = ∞. (a) Design the circuit such that the minimum common-mode voltage is vcm = −2.5 V. (b) Using the results of part (a), what is the magnitude of the differential-mode gain, Ad = |(vC1 − vC2) / (v1 − v2)|? (c) Determine vC1 and vC2 for v1 = 0.507 V and v2 = 0.493 V. (d) What is the minimum output resistance of the current source such that CMRRdB = 60 dB for a one-sided output.
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