Feedback Signal Calculator

✖The Open Loop Gain of an Operational Amplifier is gain of an op-amp without feedback. It is denoted as A.ⓘ Open Loop Gain of an Operational Amplifier [A]			+10% -10%
✖The feedback factor of an op-amp application defines the circuit performance.ⓘ Feedback Factor [β]			+10% -10%
✖Source signal is a voltage-controlled current source, an amplitude/frequency stabilized sine wave oscillator.ⓘ Source Signal [S_so]			+10% -10%

✖The feedback signal is a fraction of the output that is added to the input.ⓘ Feedback Signal [S_f]

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Feedback Signal Solution

STEP 0: Pre-Calculation Summary

Formula Used

Feedback Signal = ((Open Loop Gain of an Operational Amplifier*Feedback Factor)/(1+(Open Loop Gain of an Operational Amplifier*Feedback Factor)))*Source Signal
S_f = ((A*β)/(1+(A*β)))*S_so
This formula uses 4 Variables

Variables Used

Feedback Signal - The feedback signal is a fraction of the output that is added to the input.
Open Loop Gain of an Operational Amplifier - The Open Loop Gain of an Operational Amplifier is gain of an op-amp without feedback. It is denoted as A.
Feedback Factor - The feedback factor of an op-amp application defines the circuit performance.
Source Signal - Source signal is a voltage-controlled current source, an amplitude/frequency stabilized sine wave oscillator.

STEP 1: Convert Input(s) to Base Unit

Open Loop Gain of an Operational Amplifier: 2.2 --> No Conversion Required
Feedback Factor: 0.454 --> No Conversion Required
Source Signal: 22 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

S_f = ((A*β)/(1+(A*β)))*S_so --> ((2.2*0.454)/(1+(2.2*0.454)))*22

Evaluating ... ...

S_f = 10.9933960376226

STEP 3: Convert Result to Output's Unit

10.9933960376226 --> No Conversion Required

FINAL ANSWER

10.9933960376226 ≈ 10.9934 <-- Feedback Signal

(Calculation completed in 00.004 seconds)

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Created by Payal Priya

Birsa Institute of Technology (BIT), Sindri

Payal Priya has created this Calculator and 600+ more calculators!

Verified by Anshika Arya

National Institute Of Technology (NIT), Hamirpur

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< Signal Analysis Calculators

Feedback Signal

LaTeX Go Feedback Signal = ((Open Loop Gain of an Operational Amplifier*Feedback Factor)/(1+(Open Loop Gain of an Operational Amplifier*Feedback Factor)))*Source Signal

Error Signal

LaTeX Go Error Signal = Source Signal/(1+(Open Loop Gain of an Operational Amplifier*Feedback Factor))

Output Signal in Feedback Amplifier

LaTeX Go Signal Output = Open Loop Gain of an Operational Amplifier*Input Signal Feedback

Feedback Factor of Feedback Amplifier

LaTeX Go Feedback Factor = Input Signal Feedback/Signal Output

< Negative Feedback Amplifiers Calculators

Gain at Mid and High Frequencies

LaTeX Go Gain Factor = Mid Band Gain/(1+(Complex Frequency Variable/Upper 3-dB Frequency))

Gain with Feedback of Feedback Amplifier

LaTeX Go Gain with Feedback = (Open Loop Gain of an Operational Amplifier)/Amount of Feedback

Closed-Loop Gain as Function of Ideal Value

LaTeX Go Closed-Loop Gain = (1/Feedback Factor)*(1/(1+(1/Loop Gain)))

Amount of Feedback Given Loop Gain

LaTeX Go Amount of Feedback = 1+Loop Gain

Feedback Signal Formula

LaTeX Go

Feedback Signal = ((Open Loop Gain of an Operational Amplifier*Feedback Factor)/(1+(Open Loop Gain of an Operational Amplifier*Feedback Factor)))*Source Signal
S_f = ((A*β)/(1+(A*β)))*S_so

What is feedback amplifier?

The process of injecting a fraction of the output energy of some device back to the input is known as Feedback. It has been found that feedback is very useful in reducing noise and making the amplifier operation stable.

Depending upon whether the feedback signal aids or opposes the input signal, there are two types of feedbacks used - Positive Feedback and Negative Feedback.
The feedback in which the feedback energy i.e., either voltage or current is in phase with the input signal and thus aids it is called Positive feedback.

The feedback in which the feedback energy i.e., either voltage or current is out of phase with the input and thus opposes it, is called negative feedback.

How to Calculate Feedback Signal?

Feedback Signal calculator uses Feedback Signal = ((Open Loop Gain of an Operational Amplifier*Feedback Factor)/(1+(Open Loop Gain of an Operational Amplifier*Feedback Factor)))*Source Signal to calculate the Feedback Signal, The Feedback Signal formula is defined as a fraction of the output that is added to the input. If this signal is in phase with the input the feedback is positive; if it is in the opposite phase (anti-phase) the feedback is negative. Feedback Signal is denoted by S_f symbol.

How to calculate Feedback Signal using this online calculator? To use this online calculator for Feedback Signal, enter Open Loop Gain of an Operational Amplifier (A), Feedback Factor (β) & Source Signal (S_so) and hit the calculate button. Here is how the Feedback Signal calculation can be explained with given input values -> 10.9934 = ((2.2*0.454)/(1+(2.2*0.454)))*22.

FAQ

What is Feedback Signal?

The Feedback Signal formula is defined as a fraction of the output that is added to the input. If this signal is in phase with the input the feedback is positive; if it is in the opposite phase (anti-phase) the feedback is negative and is represented as S_f = ((A*β)/(1+(A*β)))*S_so or Feedback Signal = ((Open Loop Gain of an Operational Amplifier*Feedback Factor)/(1+(Open Loop Gain of an Operational Amplifier*Feedback Factor)))*Source Signal. The Open Loop Gain of an Operational Amplifier is gain of an op-amp without feedback. It is denoted as A, The feedback factor of an op-amp application defines the circuit performance & Source signal is a voltage-controlled current source, an amplitude/frequency stabilized sine wave oscillator.

How to calculate Feedback Signal?

The Feedback Signal formula is defined as a fraction of the output that is added to the input. If this signal is in phase with the input the feedback is positive; if it is in the opposite phase (anti-phase) the feedback is negative is calculated using Feedback Signal = ((Open Loop Gain of an Operational Amplifier*Feedback Factor)/(1+(Open Loop Gain of an Operational Amplifier*Feedback Factor)))*Source Signal. To calculate Feedback Signal, you need Open Loop Gain of an Operational Amplifier (A), Feedback Factor (β) & Source Signal (S_so). With our tool, you need to enter the respective value for Open Loop Gain of an Operational Amplifier, Feedback Factor & Source Signal and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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