## Threshold Voltage of Low Noise Amplifier Solution

STEP 0: Pre-Calculation Summary
Formula Used
Threshold Voltage = Gate to Source Voltage-(2*Drain Current)/(Transconductance)
Vth = Vgs-(2*Id)/(gm)
This formula uses 4 Variables
Variables Used
Threshold Voltage - (Measured in Volt) - Threshold Voltage is the minimum gate-to-source voltage that is needed to create a conducting path between the source and drain terminals of a field-effect transistor.
Gate to Source Voltage - (Measured in Volt) - Gate to Source Voltage is the voltage applied between the gate and source terminals of a field-effect transistor.
Drain Current - (Measured in Ampere) - Drain Current is the current flowing through the drain terminal of a field-effect transistor .
Transconductance - (Measured in Siemens) - Transconductance is a measure of how much current the amplifier can produce for a given input voltage.
STEP 1: Convert Input(s) to Base Unit
Gate to Source Voltage: 43 Volt --> 43 Volt No Conversion Required
Drain Current: 11.99 Ampere --> 11.99 Ampere No Conversion Required
Transconductance: 2.18 Siemens --> 2.18 Siemens No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Vth = Vgs-(2*Id)/(gm) --> 43-(2*11.99)/(2.18)
Evaluating ... ...
Vth = 32
STEP 3: Convert Result to Output's Unit
32 Volt --> No Conversion Required
32 Volt <-- Threshold Voltage
(Calculation completed in 00.004 seconds)
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## < 14 Low-Noise Amplifiers 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

## Threshold Voltage of Low Noise Amplifier Formula

Threshold Voltage = Gate to Source Voltage-(2*Drain Current)/(Transconductance)
Vth = Vgs-(2*Id)/(gm)

## What are some applications where threshold voltage control is important for LNAs?

Controlling the FET's operating point and compensating for variations in Vth is crucial for LNAs in various applications:

Radio astronomy: LNAs in radio astronomy applications require precise Vth control to minimize noise and maximize the sensitivity of the system for detecting weak astronomical signals.

Medical imaging: LNAs in medical imaging equipment, such as MRI scanners, need accurate operating point adjustment to ensure the integrity of the signals used for diagnostics and treatment.

## How to Calculate Threshold Voltage of Low Noise Amplifier?

Threshold Voltage of Low Noise Amplifier calculator uses Threshold Voltage = Gate to Source Voltage-(2*Drain Current)/(Transconductance) to calculate the Threshold Voltage, The Threshold Voltage of Low Noise Amplifier formula is defined as a critical parameter that determines the transistor's ability to conduct current and significantly influences the amplifier's performance. Threshold Voltage is denoted by Vth symbol.

How to calculate Threshold Voltage of Low Noise Amplifier using this online calculator? To use this online calculator for Threshold Voltage of Low Noise Amplifier, enter Gate to Source Voltage (Vgs), Drain Current (Id) & Transconductance (gm) and hit the calculate button. Here is how the Threshold Voltage of Low Noise Amplifier calculation can be explained with given input values -> 31.74178 = 43-(2*11.99)/(2.18).

### FAQ

What is Threshold Voltage of Low Noise Amplifier?
The Threshold Voltage of Low Noise Amplifier formula is defined as a critical parameter that determines the transistor's ability to conduct current and significantly influences the amplifier's performance and is represented as Vth = Vgs-(2*Id)/(gm) or Threshold Voltage = Gate to Source Voltage-(2*Drain Current)/(Transconductance). Gate to Source Voltage is the voltage applied between the gate and source terminals of a field-effect transistor, Drain Current is the current flowing through the drain terminal of a field-effect transistor & Transconductance is a measure of how much current the amplifier can produce for a given input voltage.
How to calculate Threshold Voltage of Low Noise Amplifier?
The Threshold Voltage of Low Noise Amplifier formula is defined as a critical parameter that determines the transistor's ability to conduct current and significantly influences the amplifier's performance is calculated using Threshold Voltage = Gate to Source Voltage-(2*Drain Current)/(Transconductance). To calculate Threshold Voltage of Low Noise Amplifier, you need Gate to Source Voltage (Vgs), Drain Current (Id) & Transconductance (gm). With our tool, you need to enter the respective value for Gate to Source Voltage, Drain Current & Transconductance 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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