9.98 Figure P9.98 shows a differential cascode amplifier with an active load formed by a Wilson current mirror. Utilizing the expressions derived in Chapter 8 for the output resistance of a bipolar cascode and the output resistance of the Wilson mirror, and assuming all transistors to be identical, show that the differential voltage gain Ad is given approximately by A d = 1 3 βgmro Evaluate A d for the case of β = 100 and VA =20 V

9.98 - 9.98 Figure P9.98 shows a differential cascode amplifier with an active load formed by a Wilson current mirror. Utilizing the expressions derived in Chapter 8 for the output resistance of a bipolar cascode and the output resistance of the Wilson mirror, and assuming all transistors to be identical, show that the differential voltage gain Ad is given approximately by A d = 1 3 βgmro Evaluate A d for the case of β = 100 and VA =20 V9.98a - 9.98 Figure P9.98 shows a differential cascode amplifier with an active load formed by a Wilson current mirror. Utilizing the expressions derived in Chapter 8 for the output resistance of a bipolar cascode and the output resistance of the Wilson mirror, and assuming all transistors to be identical, show that the differential voltage gain Ad is given approximately by A d = 1 3 βgmro Evaluate A d for the case of β = 100 and VA =20 V

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images - 9.98 Figure P9.98 shows a differential cascode amplifier with an active load formed by a Wilson current mirror. Utilizing the expressions derived in Chapter 8 for the output resistance of a bipolar cascode and the output resistance of the Wilson mirror, and assuming all transistors to be identical, show that the differential voltage gain Ad is given approximately by A d = 1 3 βgmro Evaluate A d for the case of β = 100 and VA =20 V

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