The differential amplifier of Fig. 9.32(a) is measured and found to have a short-circuit

Chapter 9, Problem 9.85

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The differential amplifier of Fig. 9.32(a) is measured and found to have a short-circuit transconductance of 2 mA/V. A differential input signal is applied and the output voltage is measured with a load resistance RL connected. It is found that when RL is reduced from to 20 k, the magnitude of the output signal is reduced by half. What do you estimate Ro and Ad (with RL disconnected) to be?

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