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Relationship Between Gain and Bandwidth in Amplifiers

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See the attached file.
1- Sketch the dc transfer characteristic of the circuit shown below. [VBE(on) = 0.7 V] and also explain the theory behind the working of this circuit.

(see diagram in attached file)

2- what is the relationship between gain and bandwidth in amplifiers with negative feedback? How about positive feedback?

- what is the advantage of a cascode gain stage?

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The solution assists with sketching the dc transfer characteristic of the circuit shown below. [VBE(on) = 0.7 V] and also explain the theory behind the working of this circuit. It also discusses what is the relationship between gain and bandwidth in amplifiers with negative feedback? How about positive feedback?

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