On OP AMPS with negative feedback, what happens with the closed loop gainwhen we increase its open loop gain?Your answerWhat is the value of our phase angle if the frequency is equal to 10 times belowthe Fc?Your answerWhat happens to the input impedance on inverting amplifiers when the openloop gain increases?Your answer

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On OP AMPS with negative feedback, what happens with the closed loop gain when we increase its open loop gain?

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Concept explainers

Operational Amplifier

An operational amplifier also called op amp is an integrated circuit or analog circuit that takes input as a differential voltage and produces output as a single-ended voltage. It is an IC that can amplify weak electric signals.An op amp has one output pin and two input pins. The basic role of an opamp is to amplify the voltage difference between the two input voltages. It is also used in filtering or to perform mathematical operations or in signal conditioning.

Question

On OP AMPS with negative feedback, what happens with the closed loop gain
when we increase its open loop gain?
Your answer
What is the value of our phase angle if the frequency is equal to 10 times below
the Fc?
Your answer
What happens to the input impedance on inverting amplifiers when the open
loop gain increases?
Your answer

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QI. A siniscidal voltage waveform with 5 V pk-pk and period of 10 as is applied to the input of the op-amp shown in the figure. The open loop gain is 200000 and the supply voltage is +12 . Draw the input and output waveforms showing the time relationship. Vee
Help me with the following multiple choices questions : 1.Current cannot flow to ground through ______ A.an ordinary ground B.a virtual ground C.a mechanical ground D.an a.c ground 2.For an OP-amp with negative feedback, the output is .... A. fed back to the noninverting input B. fed back to the inverting input C.equal to the input D.increased 3. A certain inverting amplifier has a closed loop voltage gain of 25. The OP-amp has an open-loop voltage gain of 100,000. If an OP-amp with an open-loop voltage gain of 200,000 is substituted in the arrangement, the closed-loop gain________ A. remains at 25 B. doubles C. increases slightly D. drops to 12.5
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3A
In class C operation, the operating point is generally located above cut off point + of the DC load line. above cut off point At saturation point below cut off point at cut off point at the middle Negative feedback added to an op-amp increases the bandwidth and increases the gain.
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3A Problem 1. (P1) Three op-amps are connected in cascade configuration. An 80 microVolts signal is connected to the non-inverting input of the first op-amp. Both the 2nd and 3rd op-amps operates as inverting amplifiers. All feedback resistors are 420 KOhms while the input resistances are 71.4kOhms, 19.1kOhms, and 14KOhms respectively. 3H Determine the total gain of the circuit in Problem No. 1 (P1) a.792.105 b.9000 c.792 V d.792
Given the four statements, which of the following statements are not true about the operation of an op-amp? i. Op-amp's close loop operation employs negative feedback that takes portion of the output and applies it back out of phase with the input. 1i. In an op-amp, amplification of the common input signals is much less than that of the opposite input signals. iii. In open-loop operation, the output of the op-amp is driven to saturation with Vo- +Vsat. iv. Op-amp's close loop operation employs positive feedback that takes portion of the output and applies it back out of phase with the input. O i, iii, iv O i, iv O i i, ii O i, iv
1. The negative feedback circuits are of types (d) Four (a)One (b) Two (c) Three 2. A device with direct current coupled, high gain electronic voltage type amplifier with one output and differential input is called (a)Rectifier (b) Amplifier (c) Transformer (d) Op-amp 3. Op-Amp with positive input type configuration +V or V is called (a)Non-inverting type input (b)Inverting type input (c)Non-inverting type output (d) Inverting type output 4. Op-Amp has (a) Single (b) Similar (c)Multiple (d)Differential 5. Write the formula for closed-loop voltage gain of inverting amplifier with feedback using open-loop voltage gain and gain of the feedback circuit. (c)AF=-B/(1+AB) (d)None of the mentioned (a)AF= A/(1+AB) (b)AF= -A/(1+AB) 6. Voltage shunt feedback amplifiers are also called as (a)Non-inverting amplifier with feedback (b)Non-inverting amplifier without feedback (d) Inverting amplifier without feedback (c)Inverting amplifier with feedback 7. The type of active filter is: (a) active low…