The figure below shows a 3 stage amplifier Assume that the t

The figure below shows a 3 stage amplifier. Assume that the transistors have a beta = 100, |V_st| = 0.7V and a |V_A| = 75V Identify the type (or configuration) of each stage Find the resistance seen at the collector node of the transistors Q2 and Q4 Find the resistance seen at the collector node of the transistor QS Find the total voltage gain of the amplifier

Solution

a) the circuit is Dual input Balanced Differential amplifier with current mirror circuit.

The labeling of transistor is not visible to proced further