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Feedback Signal Formula

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The feedback signal is a fraction of the output that is added to the input. Check FAQs

S f = (\frac{A \cdot β}{1 + (A \cdot β)}) \cdot S so

S_f - Feedback Signal?A - Open Loop Gain of an Operational Amplifier?β - Feedback Factor?S_so - Source Signal?

Feedback Signal Example

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With units

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Here is how the Feedback Signal equation looks like with Values.

Here is how the Feedback Signal equation looks like with Units.

Here is how the Feedback Signal equation looks like.

10.9934 = (\frac{2.2 \cdot 0.454}{1 + (2.2 \cdot 0.454)}) \cdot 22

10.9934 = (\frac{2.2 \cdot 0.454}{1 + (2.2 \cdot 0.454)}) \cdot 22

10.9934 = (\frac{2.2 \cdot 0.454}{1 + (2.2 \cdot 0.454)}) \cdot 22

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Feedback Signal Solution

Follow our step by step solution on how to calculate Feedback Signal?

FIRST Step Consider the formula

S f = (\frac{A \cdot β}{1 + (A \cdot β)}) \cdot S so

Next Step Substitute values of Variables

∴

S f = (\frac{2.2 \cdot 0.454}{1 + (2.2 \cdot 0.454)}) \cdot 22

Next Step Prepare to Evaluate

∴

S f = (\frac{2.2 \cdot 0.454}{1 + (2.2 \cdot 0.454)}) \cdot 22

Next Step Evaluate

∴

S f = 10.9933960376226

LAST Step Rounding Answer

∴

S f = 10.9934

Feedback Signal Formula Elements

Variables

Feedback Signal

The feedback signal is a fraction of the output that is added to the input.

Symbol: S_f

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Feedback Signal

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.

Symbol: A

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Open Loop Gain of an Operational Amplifier

Feedback Factor

The feedback factor of an op-amp application defines the circuit performance.

Symbol: β

Measurement: NAUnit: Unitless

Note: Value should be less than 1.

Formulas to find Feedback Factor

Source Signal

Source signal is a voltage-controlled current source, an amplitude/frequency stabilized sine wave oscillator.

Symbol: S_so

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Source Signal

Other formulas in Signal Analysis category

Go Amount of Feedback Given Loop Gain

F am = 1 + Aβ

Go Closed-Loop Gain as Function of Ideal Value

A cl = (\frac{1}{β}) \cdot (\frac{1}{1 + (\frac{1}{Aβ})})

Go Gain with Feedback of Feedback Amplifier

A f = \frac{A}{F am}

Go Gain at Mid and High Frequencies

µ = \frac{A m}{1 + (\frac{s}{ω hf})}

How to Evaluate Feedback Signal?

Feedback Signal evaluator 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 evaluate 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 evaluate Feedback Signal using this online evaluator? To use this online evaluator for Feedback Signal, enter Open Loop Gain of an Operational Amplifier (A), Feedback Factor (β) & Source Signal (S_so) and hit the calculate button.

FAQs on Feedback Signal

What is the formula to find Feedback Signal?

The formula of Feedback Signal is expressed as Feedback Signal = ((Open Loop Gain of an Operational Amplifier*Feedback Factor)/(1+(Open Loop Gain of an Operational Amplifier*Feedback Factor)))*Source Signal. Here is an example- 10.9934 = ((2.2*0.454)/(1+(2.2*0.454)))*22.

How to calculate Feedback Signal?

With Open Loop Gain of an Operational Amplifier (A), Feedback Factor (β) & Source Signal (S_so) we can find Feedback Signal using the formula - Feedback Signal = ((Open Loop Gain of an Operational Amplifier*Feedback Factor)/(1+(Open Loop Gain of an Operational Amplifier*Feedback Factor)))*Source Signal.

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Feedback Signal Formula

Feedback Signal Example

Feedback Signal Solution

Feedback Signal Formula Elements

Other formulas in Signal Analysis category

How to Evaluate Feedback Signal?

FAQs on Feedback Signal

Variable Name