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Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain Formula

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The input resistance with feedback of a feedback amplifier is equal to the source impedance for which loop gain would drop to unity. Check FAQs

R inf = R in \cdot (1 + Aβ)

R_inf - Input Resistance with Feedback?R_in - Input Resistance?Aβ - Loop Gain?

Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain Example

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Here is how the Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain equation looks like with Values.

Here is how the Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain equation looks like with Units.

Here is how the Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain equation looks like.

90 = 25 \cdot (1 + 2.6)

90kΩ = 25kΩ \cdot (1 + 2.6)

90 = 25 \cdot (1 + 2.6)

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Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain Solution

Follow our step by step solution on how to calculate Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain?

FIRST Step Consider the formula

R inf = R in \cdot (1 + Aβ)

Next Step Substitute values of Variables

∴

R inf = 25kΩ \cdot (1 + 2.6)

Next Step Convert Units

∴

R inf = 25000Ω \cdot (1 + 2.6)

Next Step Prepare to Evaluate

∴

R inf = 25000 \cdot (1 + 2.6)

Next Step Evaluate

∴

R inf = 90000Ω

LAST Step Convert to Output's Unit

∴

R inf = 90kΩ

Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain Formula Elements

Variables

Input Resistance with Feedback

The input resistance with feedback of a feedback amplifier is equal to the source impedance for which loop gain would drop to unity.

Symbol: R_inf

Measurement: Electric ResistanceUnit: kΩ

Note: Value should be greater than 0.

Formulas to find Input Resistance with Feedback

Input Resistance

The Input Resistance is the resistance seen by the current source or voltage source which drives the circuit.

Symbol: R_in

Measurement: Electric ResistanceUnit: kΩ

Note: Value should be greater than 0.

Formulas to find Input Resistance

Loop Gain

The loop gain is calculated by imagining the feedback loop is broken at some point and calculating the net gain if a signal is applied.

Symbol: Aβ

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Loop Gain

Other formulas in Voltage Feedback Amplifiers category

Go Output Voltage of Feedback Voltage Amplifier

V o = (\frac{V in}{β})

Go Output Current of Feedback Voltage Amplifier Given Loop Gain

i o = (1 + Aβ) \cdot \frac{V o}{R o}

Go Open Loop Gain of Feedback Voltage Amplifier

A = \frac{V o}{V in}

Go Output Resistance with Feedback Voltage Amplifier

R vof = \frac{R o}{1 + Aβ}

How to Evaluate Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain?

Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain evaluator uses Input Resistance with Feedback = Input Resistance*(1+Loop Gain) to evaluate the Input Resistance with Feedback, Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain formula is defined as the input impedance of a feedback amplifier is equal to the source impedance for which loop gain would drop to unity. Input Resistance with Feedback is denoted by R_inf symbol.

How to evaluate Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain using this online evaluator? To use this online evaluator for Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain, enter Input Resistance (R_in) & Loop Gain (Aβ) and hit the calculate button.

FAQs on Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain

What is the formula to find Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain?

The formula of Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain is expressed as Input Resistance with Feedback = Input Resistance*(1+Loop Gain). Here is an example- 0.09 = 25000*(1+2.6).

How to calculate Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain?

With Input Resistance (R_in) & Loop Gain (Aβ) we can find Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain using the formula - Input Resistance with Feedback = Input Resistance*(1+Loop Gain).

Can the Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain be negative?

No, the Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain, measured in Electric Resistance cannot be negative.

Which unit is used to measure Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain?

Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain is usually measured using the Kilohm[kΩ] for Electric Resistance. Ohm[kΩ], Megohm[kΩ], Microhm[kΩ] are the few other units in which Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain can be measured.

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Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain Formula

Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain Example

Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain Solution

Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain Formula Elements

Other formulas in Voltage Feedback Amplifiers category

How to Evaluate Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain?

FAQs on Input Resistance with Feedback of Feedback Voltage Amplifier Given Loop Gain

Variable Name