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Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt) 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 = \frac{R in}{1 + A \cdot β}

R_inf - Input Resistance with Feedback?R_in - Input Resistance?A - Open Loop Gain of an Operational Amplifier?β - Feedback Factor?

Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt) Example

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Here is how the Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt) equation looks like with Values.

Here is how the Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt) equation looks like with Units.

Here is how the Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt) equation looks like.

12.5075 = \frac{25}{1 + 2.2 \cdot 0.454}

12.5075kΩ = \frac{25kΩ}{1 + 2.2 \cdot 0.454}

12.5075 = \frac{25}{1 + 2.2 \cdot 0.454}

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Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt) Solution

Follow our step by step solution on how to calculate Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt)?

FIRST Step Consider the formula

R inf = \frac{R in}{1 + A \cdot β}

Next Step Substitute values of Variables

∴

R inf = \frac{25kΩ}{1 + 2.2 \cdot 0.454}

Next Step Convert Units

∴

R inf = \frac{25000Ω}{1 + 2.2 \cdot 0.454}

Next Step Prepare to Evaluate

∴

R inf = \frac{25000}{1 + 2.2 \cdot 0.454}

Next Step Evaluate

∴

R inf = 12507.5045027016Ω

Next Step Convert to Output's Unit

∴

R inf = 12.5075045027016kΩ

LAST Step Rounding Answer

∴

R inf = 12.5075kΩ

Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt) 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

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

Other formulas in Shunt Feedback Amplifiers category

Go Open Loop Gain of Feedback Transresistance Amplifier (Shunt-Shunt)

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

Go Output Resistance of Feedback Transresistance Amplifier(Shunt-Shunt)

R o = \frac{R cof}{1 + A \cdot β}

How to Evaluate Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt)?

Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt) evaluator uses Input Resistance with Feedback = Input Resistance/(1+Open Loop Gain of an Operational Amplifier*Feedback Factor) to evaluate the Input Resistance with Feedback, The Input resistance with feedback of Feedback Transresistance Amplifier (Shunt-Shunt) Given Loop Gain formula is defined as the resistance seen by the current source or voltage source which drives the circuit. Input Resistance with Feedback is denoted by R_inf symbol.

How to evaluate Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt) using this online evaluator? To use this online evaluator for Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt), enter Input Resistance (R_in), Open Loop Gain of an Operational Amplifier (A) & Feedback Factor (β) and hit the calculate button.

FAQs on Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt)

What is the formula to find Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt)?

The formula of Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt) is expressed as Input Resistance with Feedback = Input Resistance/(1+Open Loop Gain of an Operational Amplifier*Feedback Factor). Here is an example- 0.012508 = 25000/(1+2.2*0.454).

How to calculate Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt)?

With Input Resistance (R_in), Open Loop Gain of an Operational Amplifier (A) & Feedback Factor (β) we can find Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt) using the formula - Input Resistance with Feedback = Input Resistance/(1+Open Loop Gain of an Operational Amplifier*Feedback Factor).

Can the Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt) be negative?

No, the Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt), measured in Electric Resistance cannot be negative.

Which unit is used to measure Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt)?

Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt) 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 Transresistance Amplifier (Shunt-Shunt) can be measured.

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Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt) Formula

Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt) Example

Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt) Solution

Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt) Formula Elements

Other formulas in Shunt Feedback Amplifiers category

How to Evaluate Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt)?

FAQs on Input Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt)

Variable Name