Drain Current of Low Noise Amplifier Solution

STEP 0: Pre-Calculation Summary
Formula Used
Drain Current = (Transconductance*(Gate to Source Voltage-Threshold Voltage))/2
Id = (gm*(Vgs-Vth))/2
This formula uses 4 Variables
Variables Used
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.
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.
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.
STEP 1: Convert Input(s) to Base Unit
Transconductance: 2.18 Siemens --> 2.18 Siemens No Conversion Required
Gate to Source Voltage: 43 Volt --> 43 Volt No Conversion Required
Threshold Voltage: 32 Volt --> 32 Volt No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Id = (gm*(Vgs-Vth))/2 --> (2.18*(43-32))/2
Evaluating ... ...
Id = 11.99
STEP 3: Convert Result to Output's Unit
11.99 Ampere --> No Conversion Required
FINAL ANSWER
11.99 Ampere <-- Drain Current
(Calculation completed in 00.004 seconds)

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VIT University (VIT), Chennai
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14 Low-Noise Amplifiers Calculators

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

Drain Current of Low Noise Amplifier Formula

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

How is drain current typically measured in LNAs?

Drain current can be measured using various techniques, including:

Direct measurement: A current probe or ammeter can be connected to the drain terminal of the transistor to directly measure the drain current.

Indirect measurement: The drain current can be calculated based on the voltage across the transistor's drain-to-source resistance and the transistor's transconductance .

How to Calculate Drain Current of Low Noise Amplifier?

Drain Current of Low Noise Amplifier calculator uses Drain Current = (Transconductance*(Gate to Source Voltage-Threshold Voltage))/2 to calculate the Drain Current, The Drain Current of Low Noise Amplifier formula is defined as a measure of how much current the amplifier draws from the power supply. It is an important parameter because it affects the amplifier's noise figure and power consumption. Drain Current is denoted by Id symbol.

How to calculate Drain Current of Low Noise Amplifier using this online calculator? To use this online calculator for Drain Current of Low Noise Amplifier, enter Transconductance (gm), Gate to Source Voltage (Vgs) & Threshold Voltage (Vth) and hit the calculate button. Here is how the Drain Current of Low Noise Amplifier calculation can be explained with given input values -> 11.715 = (2.18*(43-32))/2.

FAQ

What is Drain Current of Low Noise Amplifier?
The Drain Current of Low Noise Amplifier formula is defined as a measure of how much current the amplifier draws from the power supply. It is an important parameter because it affects the amplifier's noise figure and power consumption and is represented as Id = (gm*(Vgs-Vth))/2 or Drain Current = (Transconductance*(Gate to Source Voltage-Threshold Voltage))/2. Transconductance is a measure of how much current the amplifier can produce for a given input voltage, Gate to Source Voltage is the voltage applied between the gate and source terminals of a field-effect transistor & 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.
How to calculate Drain Current of Low Noise Amplifier?
The Drain Current of Low Noise Amplifier formula is defined as a measure of how much current the amplifier draws from the power supply. It is an important parameter because it affects the amplifier's noise figure and power consumption is calculated using Drain Current = (Transconductance*(Gate to Source Voltage-Threshold Voltage))/2. To calculate Drain Current of Low Noise Amplifier, you need Transconductance (gm), Gate to Source Voltage (Vgs) & Threshold Voltage (Vth). With our tool, you need to enter the respective value for Transconductance, Gate to Source Voltage & Threshold Voltage 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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