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Input Impedance of Low Noise Amplifier Formula

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Input Impedance is the opposition to current flow into an electrical circuit when a voltage is applied to its input terminals. Check FAQs

Z in = (\frac{1}{g m}) + α \cdot Z l

Z_in - Input Impedance?g_m - Transconductance?α - Feedback Factor?Z_l - Load Impedance?

Input Impedance of Low Noise Amplifier Example

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Here is how the Input Impedance of Low Noise Amplifier equation looks like with Values.

Here is how the Input Impedance of Low Noise Amplifier equation looks like with Units.

Here is how the Input Impedance of Low Noise Amplifier equation looks like.

1.0695 = (\frac{1}{2.18}) + 0.06 \cdot 10.18

1.0695Ω = (\frac{1}{2.18S}) + 0.06 \cdot 10.18Ω

1.0695 = (\frac{1}{2.18}) + 0.06 \cdot 10.18

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Input Impedance of Low Noise Amplifier Solution

Follow our step by step solution on how to calculate Input Impedance of Low Noise Amplifier?

FIRST Step Consider the formula

Z in = (\frac{1}{g m}) + α \cdot Z l

Next Step Substitute values of Variables

∴

Z in = (\frac{1}{2.18S}) + 0.06 \cdot 10.18Ω

Next Step Prepare to Evaluate

∴

Z in = (\frac{1}{2.18}) + 0.06 \cdot 10.18

Next Step Evaluate

∴

Z in = 1.06951559633028Ω

LAST Step Rounding Answer

∴

Z in = 1.0695Ω

Input Impedance of Low Noise Amplifier Formula Elements

Variables

Input Impedance

Input Impedance is the opposition to current flow into an electrical circuit when a voltage is applied to its input terminals.

Symbol: Z_in

Measurement: Electric ResistanceUnit: Ω

Note: Value should be greater than 0.

Formulas to find Input Impedance

Transconductance

Transconductance is a measure of how much current the amplifier can produce for a given input voltage.

Symbol: g_m

Measurement: TransconductanceUnit: S

Note: Value should be greater than 0.

Formulas to find Transconductance

Feedback Factor

Feedback Factor is a critical parameter that determines the stability and noise performance of amplifiers.

Symbol: α

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Feedback Factor

Load Impedance

Load Impedance is a measure of the resistance that the load presents to current flow at the FET's output.

Symbol: Z_l

Measurement: Electric ResistanceUnit: Ω

Note: Value should be greater than 0.

Formulas to find Load Impedance

Other formulas in RF Microelectronics category

Go Return Loss of Low-Noise Amplifier

Γ = mod \underset{̲}{u} s {(\frac{Z in - R s}{Z in + R s})}^{2}

Go Voltage Gain of Low Noise Amplifier

A v = g m \cdot R d

Go Voltage Gain of Low Noise Amplifier given DC Voltage Drop

A v = 2 \cdot \frac{V rd}{V gs - V th}

Go Output Impedance of Low Noise Amplifier

R out = (\frac{1}{2}) \cdot (R f + R s)

How to Evaluate Input Impedance of Low Noise Amplifier?

Input Impedance of Low Noise Amplifier evaluator uses Input Impedance = (1/Transconductance)+Feedback Factor*Load Impedance to evaluate the Input Impedance, The Input Impedance of Low Noise Amplifier formula is defined as a measure of how much the FET's channel width changes in response to changes in the gate-to-source voltage. Input Impedance is denoted by Z_in symbol.

How to evaluate Input Impedance of Low Noise Amplifier using this online evaluator? To use this online evaluator for Input Impedance of Low Noise Amplifier, enter Transconductance (g_m), Feedback Factor (α) & Load Impedance (Z_l) and hit the calculate button.

FAQs on Input Impedance of Low Noise Amplifier

What is the formula to find Input Impedance of Low Noise Amplifier?

The formula of Input Impedance of Low Noise Amplifier is expressed as Input Impedance = (1/Transconductance)+Feedback Factor*Load Impedance. Here is an example- 1.076716 = (1/2.18)+0.06*10.18.

How to calculate Input Impedance of Low Noise Amplifier?

With Transconductance (g_m), Feedback Factor (α) & Load Impedance (Z_l) we can find Input Impedance of Low Noise Amplifier using the formula - Input Impedance = (1/Transconductance)+Feedback Factor*Load Impedance.

Can the Input Impedance of Low Noise Amplifier be negative?

No, the Input Impedance of Low Noise Amplifier, measured in Electric Resistance cannot be negative.

Which unit is used to measure Input Impedance of Low Noise Amplifier?

Input Impedance of Low Noise Amplifier is usually measured using the Ohm[Ω] for Electric Resistance. Megohm[Ω], Microhm[Ω], Volt per Ampere[Ω] are the few other units in which Input Impedance of Low Noise Amplifier can be measured.

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Input Impedance of Low Noise Amplifier Formula

Input Impedance of Low Noise Amplifier Example

Input Impedance of Low Noise Amplifier Solution

Input Impedance of Low Noise Amplifier Formula Elements

Other formulas in RF Microelectronics category

How to Evaluate Input Impedance of Low Noise Amplifier?

FAQs on Input Impedance of Low Noise Amplifier

Variable Name