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Load Impedance of Low Noise Amplifier Calculator

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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.ⓘ Input Impedance [Z_in]			+10% -10%
✖Transconductance is a measure of how much current the amplifier can produce for a given input voltage.ⓘ Transconductance [g_m]			+10% -10%
✖Feedback Factor is a critical parameter that determines the stability and noise performance of amplifiers.ⓘ Feedback Factor [α]			+10% -10%

✖Load Impedance is a measure of the resistance that the load presents to current flow at the FET's output.ⓘ Load Impedance of Low Noise Amplifier [Z_l]

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Load Impedance of Low Noise Amplifier Solution

STEP 0: Pre-Calculation Summary

Formula Used

Load Impedance = (Input Impedance-(1/Transconductance))/Feedback Factor
Z_l = (Z_in-(1/g_m))/α
This formula uses 4 Variables

Variables Used

Load Impedance - (Measured in Ohm) - Load Impedance is a measure of the resistance that the load presents to current flow at the FET's output.
Input Impedance - (Measured in Ohm) - Input Impedance is the opposition to current flow into an electrical circuit when a voltage is applied to its input terminals.
Transconductance - (Measured in Siemens) - Transconductance is a measure of how much current the amplifier can produce for a given input voltage.
Feedback Factor - Feedback Factor is a critical parameter that determines the stability and noise performance of amplifiers.

STEP 1: Convert Input(s) to Base Unit

Input Impedance: 1.07 Ohm --> 1.07 Ohm No Conversion Required
Transconductance: 2.18 Siemens --> 2.18 Siemens No Conversion Required
Feedback Factor: 0.06 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

Z_l = (Z_in-(1/g_m))/α --> (1.07-(1/2.18))/0.06

Evaluating ... ...

Z_l = 10.1880733944954

STEP 3: Convert Result to Output's Unit

10.1880733944954 Ohm --> No Conversion Required

FINAL ANSWER

10.1880733944954 ≈ 10.18807 Ohm <-- Load Impedance

(Calculation completed in 00.007 seconds)

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< RF Microelectronics Calculators

Return Loss of Low-Noise Amplifier

LaTeX Go Return Loss = modulus((Input Impedance-Source Impedance)/(Input Impedance+Source Impedance))^2

Voltage Gain of Low Noise Amplifier given DC Voltage Drop

LaTeX Go Voltage Gain = 2*DC Voltage Drop/(Gate to Source Voltage-Threshold Voltage)

Output Impedance of Low Noise Amplifier

LaTeX Go Output Impedance = (1/2)*(Feedback Resistance+Source Impedance)

Voltage Gain of Low Noise Amplifier

LaTeX Go Voltage Gain = Transconductance*Drain Resistance

Load Impedance of Low Noise Amplifier Formula

LaTeX Go

Load Impedance = (Input Impedance-(1/Transconductance))/Feedback Factor
Z_l = (Z_in-(1/g_m))/α

How can we match the load impedance of an LNA?

There are several ways to match the load impedance of an LNA:

Matching network: A matching network is a circuit that is designed to transform the impedance of the load to a value that is closer to the impedance of the amplifier.

Transformer: A transformer can be used to transform the impedance of the load to a value that is closer to the impedance of the amplifier.

Active impedance matching: Active impedance matching circuits can be used to dynamically match the load impedance to the amplifier's output impedance.

How to Calculate Load Impedance of Low Noise Amplifier?

Load Impedance of Low Noise Amplifier calculator uses Load Impedance = (Input Impedance-(1/Transconductance))/Feedback Factor to calculate the Load Impedance, The Load Impedance of Low Noise Amplifier formula is defined as a crucial parameter that determines the amplifier's ability to transfer power efficiently to the load and minimize reflections that can distort the signal. Load Impedance is denoted by Z_l symbol.

How to calculate Load Impedance of Low Noise Amplifier using this online calculator? To use this online calculator for Load Impedance of Low Noise Amplifier, enter Input Impedance (Z_in), Transconductance (g_m) & Feedback Factor (α) and hit the calculate button. Here is how the Load Impedance of Low Noise Amplifier calculation can be explained with given input values -> 10.18807 = (1.07-(1/2.18))/0.06.

FAQ

What is Load Impedance of Low Noise Amplifier?

The Load Impedance of Low Noise Amplifier formula is defined as a crucial parameter that determines the amplifier's ability to transfer power efficiently to the load and minimize reflections that can distort the signal and is represented as Z_l = (Z_in-(1/g_m))/α or Load Impedance = (Input Impedance-(1/Transconductance))/Feedback Factor. Input Impedance is the opposition to current flow into an electrical circuit when a voltage is applied to its input terminals, Transconductance is a measure of how much current the amplifier can produce for a given input voltage & Feedback Factor is a critical parameter that determines the stability and noise performance of amplifiers.

How to calculate Load Impedance of Low Noise Amplifier?

The Load Impedance of Low Noise Amplifier formula is defined as a crucial parameter that determines the amplifier's ability to transfer power efficiently to the load and minimize reflections that can distort the signal is calculated using Load Impedance = (Input Impedance-(1/Transconductance))/Feedback Factor. To calculate Load Impedance of Low Noise Amplifier, you need Input Impedance (Z_in), Transconductance (g_m) & Feedback Factor (α). With our tool, you need to enter the respective value for Input Impedance, Transconductance & Feedback Factor 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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