2. What is the equivalent noise resistance of a cascading system of two amplifiers with resistances 120k-ohm and 130k-ohm respectively. The power gain for the first am plifier is 23 while the gain of the second amplifier is equal to 40.

2. What is the equivalent noise resistance of a cascading system of two amplifiers with resistances 120k-ohm and 130k-ohm respectively. The power gain for the first am plifier is 23 while the gain of the second amplifier is equal to 40.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter12: Power System Controls

Section: Chapter Questions

Problem 12.3P

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Concept explainers

Multistage Amplifier

The multistage amplifier is generally a voltage or power amplifier. The multistage amplifier has a number of single stage amplifier that are cascaded together. Since a single stage amplifier output is not useful, they are being replaced with multistage amplifiers or multistage transistor amplifiers. The multistage amplifier are used where the gain required is high or the input signal is very small such that only a single stage amplifier cannot amplify it.

Question

2. What is the equivalent noise resistance of a cascading system of two amplifiers with
resistances 120k-ohm and 130k-ohm respectively. The power gain for the first
amplifier is 23 while the gain of the second amplifier is equal to 40.

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