9- Why the gain of the amplifier in the low frequency sidedecrease when the frequency decrease for BJT?10-Why the gain of the amplifier in the high frequency sidedecrease when the frequency increases for BJT?11-What are the conditions to get an oscillator?12-Comparison Between Positive and Negative Feedback13-What is the poles or corner frequency?14-What are the main disadvantage of negative feedback?15-What are the effects of negative feedback on Z; and Z, forthe following circuits and what is the type of configuration?

As per the guidelines of bartleyby I need to answer first three questions only so Kindle repost…

9- Why the gain of the amplifier in the low frequency side decrease when the frequency decrease for BJT? 10- Why the gain of the amplifier in the high frequency side decrease when the frequency increases for BJT? 11- What are the conditions to get an oscillator?

9- Why the gain of the amplifier in the low frequency side decrease when the frequency decrease for BJT? 10- Why the gain of the amplifier in the high frequency side decrease when the frequency increases for BJT? 11- What are the conditions to get an oscillator?

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

BJT (Bipolar Junction Transistor)

A BJT is a semiconductor device with 3 terminals that consist of a p-n junction diode that can amplify the signal or current. It is a current-controlled device. The three BJT terminals are base, collector, and emitter. The BJT works with the charge carrier, the two type of carriers in the BJT are holes and electrons, the charge carriers flow by the process of recombination. The signal to be amplifier is generally given as the input at the base terminal and an amplified form of it is available at the collector terminal.

Question

9- Why the gain of the amplifier in the low frequency side
decrease when the frequency decrease for BJT?
10-
Why the gain of the amplifier in the high frequency side
decrease when the frequency increases for BJT?
11-
What are the conditions to get an oscillator?
12-
Comparison Between Positive and Negative Feedback
13-
What is the poles or corner frequency?
14-
What are the main disadvantage of negative feedback?
15-
What are the effects of negative feedback on Z; and Z, for
the following circuits and what is the type of configuration?

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Given the differential amplifier circuit, (a) Determine hie1 and hie2.(b) Determine the common-mode rejection ratio CMRR for single-ended output.(c) Determine the single-ended output Vo2 if Vs1=10mV and Vs2= Vs1.(d) Determine the double-ended output Vout if Vs1=10mV and Vs2= -Vs1.
1. What is meant by the “frequency response” of an amplifier? 2. Why is it necessary to maintain a constant-level input signal? 3. How does negative feedback extend the frequency response of the BJT amplifier? How is it demonstrated in this experiment?
Given: Vin =5V Rin=1K Rf=100 ohms. Identify: a. What is the value of Vout? b. What is the voltage gain? c. If the input is connected to the non-inverting input along with the feedback, what is the value of the output voltage? d. If the input is connected to the non-inverting input along with the feedback, what is the voltage gain of the circuit? e. If greater voltage gain is a requirement, which set-up is a better choice? -inverting OP AMP -non-inverting OP AMP -both may will do fine -neither will do well
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1)-Draw the theoretical input and output characteristics of BJT. Input and output resistances of BJT are ........ and..........
Design an operational-amplifier circuit (using two inverting configurations) with compensating resistor (??) for each amplifier, to produce the output of: ??= −5?1+2?2−0.1?3+5?4. Choose a suitable feedback resistor ?? for each amplifier.
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