## Output Impedance of Low Noise Amplifier Solution

STEP 0: Pre-Calculation Summary
Formula Used
Output Impedance = (1/2)*(Feedback Resistance+Source Impedance)
Rout = (1/2)*(Rf+Rs)
This formula uses 3 Variables
Variables Used
Output Impedance - (Measured in Ohm) - Output Impedance is a measure of the opposition to current flow that an electrical source presents to its load.
Feedback Resistance - (Measured in Ohm) - Feedback Resistance is a resistance that is connected between the output of the amplifier and the input of the amplifier.
Source Impedance - (Measured in Ohm) - Source Impedance is the opposition to current flow that the source presents to the load.
STEP 1: Convert Input(s) to Base Unit
Feedback Resistance: 35 Ohm --> 35 Ohm No Conversion Required
Source Impedance: 23 Ohm --> 23 Ohm No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Rout = (1/2)*(Rf+Rs) --> (1/2)*(35+23)
Evaluating ... ...
Rout = 29
STEP 3: Convert Result to Output's Unit
29 Ohm --> No Conversion Required
29 Ohm <-- Output Impedance
(Calculation completed in 00.004 seconds)
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## < 14 Low-Noise Amplifiers and Mixers Calculators

Feedback Factor of Low Noise Amplifier
Feedback Factor = (Transconductance*Source Impedance-1)/(2*Transconductance*Source Impedance*Voltage Gain)
Return Loss of Low-Noise Amplifier
Return Loss = modulus((Input Impedance-Source Impedance)/(Input Impedance+Source Impedance))^2
Noise Figure of Low Noise Amplifier
Noise Figure = 1+((4*Source Impedance)/Feedback Resistance)+Noise Factor of Transistor
Gate to Source Voltage of Low Noise Amplifier
Gate to Source Voltage = ((2*Drain Current)/(Transconductance))+Threshold Voltage
Threshold Voltage of Low Noise Amplifier
Threshold Voltage = Gate to Source Voltage-(2*Drain Current)/(Transconductance)
Transconductance of Low Noise Amplifier
Transconductance = (2*Drain Current)/(Gate to Source Voltage-Threshold Voltage)
Drain Current of Low Noise Amplifier
Drain Current = (Transconductance*(Gate to Source Voltage-Threshold Voltage))/2
Voltage Gain of Low Noise Amplifier given DC Voltage Drop
Voltage Gain = 2*DC Voltage Drop/(Gate to Source Voltage-Threshold Voltage)
Load Impedance of Low Noise Amplifier
Load Impedance = (Input Impedance-(1/Transconductance))/Feedback Factor
Input Impedance of Low Noise Amplifier
Input Impedance = (1/Transconductance)+Feedback Factor*Load Impedance
Output Impedance of Low Noise Amplifier
Output Impedance = (1/2)*(Feedback Resistance+Source Impedance)
Source Impedance of Low Noise Amplifier
Source Impedance = 2*Output Impedance-Feedback Resistance
Drain Resistance of Low Noise Amplifier
Drain Resistance = Voltage Gain/Transconductance
Voltage Gain of Low Noise Amplifier
Voltage Gain = Transconductance*Drain Resistance

## Output Impedance of Low Noise Amplifier Formula

Output Impedance = (1/2)*(Feedback Resistance+Source Impedance)
Rout = (1/2)*(Rf+Rs)

## Why is the output impedance of an LNA important?

The output impedance of an LNA is important for several reasons:

It affects the power transfer between the amplifier and the load. A low output impedance means that more power is transferred to the load, while a high output impedance means that less power is transferred to the load.
It affects the frequency response of the amplifier. A high output impedance can cause reflections of signals, which can distort the signal and reduce the amplifier's bandwidth.
It affects the stability of the amplifier. A high output impedance can make the amplifier more susceptible to oscillation.

## How to Calculate Output Impedance of Low Noise Amplifier?

Output Impedance of Low Noise Amplifier calculator uses Output Impedance = (1/2)*(Feedback Resistance+Source Impedance) to calculate the Output Impedance, The Output Impedance of Low Noise Amplifier formula is defined as a crucial parameter that determines how well the amplifier can transfer amplified signals to the load without introducing reflections or distortions. It is typically measured in ohms and is ideally low to minimize signal loss and ensure efficient signal transfer. Output Impedance is denoted by Rout symbol.

How to calculate Output Impedance of Low Noise Amplifier using this online calculator? To use this online calculator for Output Impedance of Low Noise Amplifier, enter Feedback Resistance (Rf) & Source Impedance (Rs) and hit the calculate button. Here is how the Output Impedance of Low Noise Amplifier calculation can be explained with given input values -> 29 = (1/2)*(35+23).

### FAQ

What is Output Impedance of Low Noise Amplifier?
The Output Impedance of Low Noise Amplifier formula is defined as a crucial parameter that determines how well the amplifier can transfer amplified signals to the load without introducing reflections or distortions. It is typically measured in ohms and is ideally low to minimize signal loss and ensure efficient signal transfer and is represented as Rout = (1/2)*(Rf+Rs) or Output Impedance = (1/2)*(Feedback Resistance+Source Impedance). Feedback Resistance is a resistance that is connected between the output of the amplifier and the input of the amplifier & Source Impedance is the opposition to current flow that the source presents to the load.
How to calculate Output Impedance of Low Noise Amplifier?
The Output Impedance of Low Noise Amplifier formula is defined as a crucial parameter that determines how well the amplifier can transfer amplified signals to the load without introducing reflections or distortions. It is typically measured in ohms and is ideally low to minimize signal loss and ensure efficient signal transfer is calculated using Output Impedance = (1/2)*(Feedback Resistance+Source Impedance). To calculate Output Impedance of Low Noise Amplifier, you need Feedback Resistance (Rf) & Source Impedance (Rs). With our tool, you need to enter the respective value for Feedback Resistance & Source Impedance and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well. Let Others Know