Figure below shows a negative feedback system. The open loop gains of amplifiers are given as follow: 25 18 20 A, (f) = A2 (f) = A, (f) = 1+j 5000 1+ j 5000 1+ j 5000 A2 As So Determine the gain-bandwidth product, GBW of the system.

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Differential amplifier

There are two amplifying stages with common degeneration in a differential amplifier.