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UPSC Exam  >  UPSC Tests  >  Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance - UPSC MCQ

Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance - UPSC MCQ


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10 Questions MCQ Test - Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance

Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance for UPSC 2024 is part of UPSC preparation. The Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance questions and answers have been prepared according to the UPSC exam syllabus.The Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance below.
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Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance - Question 1
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 An internally compensated op amp is specified to have an open-loop dc gain of 106 dB and a unity gain bandwidth of 3 MHz. Find fb and the open-loop gain at fb.

Detailed Solution for Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance - Question 1

Use the equations below.

Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance - Question 2
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A single-pole model has __________ db/decade roll-off of the gain.

Detailed Solution for Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance - Question 2

 It is a standard characteristic of a single-pole model.

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Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance - Question 3
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Single-pole model is also known as

Detailed Solution for Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance - Question 3

Single-pole model is also called dominant pole.

Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance - Question 4
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An op amp having a 106-dB gain at dc and a single-pole frequency response with ft = 2 MHz is used to design a non-inverting amplifier with nominal dc gain of 100. The 3-dB frequency of the closed-loop gain is
Detailed Solution for Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance - Question 4

Use the equation below to obtain a frequency response curve and proceed further.

Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance - Question 5
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An internally compensated op amp has a dc open-loop gain of 106 V/V and an AC open-loop gain of 40 dB at 10 kHz. Estimate its gain–bandwidth product and its expected gain at 1 kHz.
Detailed Solution for Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance - Question 5

 

 Use the following results.

Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance - Question 6
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An inverting amplifier with nominal gain of −20 V/V employs an op amp having a dc gain of 104 and a unity-gain frequency of 106 Hz. What is the 3-dB frequency f3dB of the closed-loop amplifier?
Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance - Question 7
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cascading two identical amplifier stages, each having a low-pass STC frequency response with a 3dB frequency f1, results in an overall amplifier with a 3dB frequency given by
Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance - Question 8
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Find the ft required for internally compensated op amps to be used in the implementation of the closed loop amplifiers with dc gain of +100 V/V and 3db bandwidth of 100kHz?
Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance - Question 9
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 A particular op amp, characterized by a gain–bandwidth product of 20 MHz, is operated with a closed-loop gain of +100 V/V. What 3-dB bandwidth results? At what frequency does the closed-loop amplifier exhibit a −6° phase shift?
Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance - Question 10
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Find the ft required for internally compensated op amps to be used in the implementation of the closed loop amplifiers with dc gain of -2 V/V and 3db bandwidth of 10 MHz?
Detailed Solution for Test: Effect of Finite Open-Loop Gain & Bandwidth on Circuit Performance - Question 10

 -R2 ⁄ R1 = -2V⁄V
f3db = 10 MHZ ft = 10 MHZ(2 + 1) = 30 MHZ.

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