Figure P13.75 shows a circuit suitable for op-amp applications. For all transistors =

Chapter 13, Problem 13.75

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Figure P13.75 shows a circuit suitable for op-amp applications. For all transistors = 100, VBE = 0.7 V, and ro = . (a) For inputs grounded and output held at 0 V (by negative feedback) find the collector currents of all transistors. Neglect base currents. (b) Calculate the input resistance. (c) Calculate the gain of the amplifier with a load of 5 k. (d) With load as in (c) calculate the value of the capacitor C required for a 3-dB frequency of 100 Hz. Section 13.4: Modern Techniques for the Design of BJT Op Amps Unless otherwise specified, for the problems in this section assume N = 40, P = 10, VAn = 30 V, VAp = 20 V, VBE = 0.7 V, VCEsat = 0.1 V. D 13.76 Des

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