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Multistage Amplifer

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Attached figure shows the circuit of a multistage amplifier. Identify the stages and describe the operation and principle features of the amplifier. You should also make an estimate of the maximum output current of the
amplifier.

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Solution:
The leftmost side of the circuit is a current mirror circuit.

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This circuit sets the value of the constant current source to the amplifier circuits on the right side. The value of the constant current is set by the emitter resistor connected at T17. It is called a current mirror circuit because the set current at this side is being mirrored or copied by ...

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