Drain Current of MOSFET Small Signal Calculator

✖Electron Mean Free Path which represents the average distance an electron can travel without scattering with impurities, defeat, or other obstacles within the solid state device.ⓘ Electron Mean Free Path [λ]			+10% -10%
✖Output resistance refers to the resistance of an electronic circuit to the flow of current when a load is connected to its output.ⓘ Output Resistance [R_out]			+10% -10%

✖Drain current is the current that flows between the drain and the source terminals of a field-effect transistor (FET), which is a type of transistor commonly used in electronic circuits.ⓘ Drain Current of MOSFET Small Signal [i_d]

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Drain Current of MOSFET Small Signal

Formula

`"i"_{"d"} = 1/("λ"*"R"_{"out"})`

Example

`"0.079936mA"=1/("2.78"*"4.5kΩ")`

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Drain Current of MOSFET Small Signal Solution

STEP 0: Pre-Calculation Summary

Formula Used

Drain Current = 1/(Electron Mean Free Path*Output Resistance)
i_d = 1/(λ*R_out)
This formula uses 3 Variables

Variables Used

Drain Current - (Measured in Ampere) - Drain current is the current that flows between the drain and the source terminals of a field-effect transistor (FET), which is a type of transistor commonly used in electronic circuits.
Electron Mean Free Path - Electron Mean Free Path which represents the average distance an electron can travel without scattering with impurities, defeat, or other obstacles within the solid state device.
Output Resistance - (Measured in Ohm) - Output resistance refers to the resistance of an electronic circuit to the flow of current when a load is connected to its output.

STEP 1: Convert Input(s) to Base Unit

Electron Mean Free Path: 2.78 --> No Conversion Required
Output Resistance: 4.5 Kilohm --> 4500 Ohm (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

i_d = 1/(λ*R_out) --> 1/(2.78*4500)

Evaluating ... ...

i_d = 7.99360511590727E-05

STEP 3: Convert Result to Output's Unit

7.99360511590727E-05 Ampere -->0.0799360511590727 Milliampere (Check conversion here)

FINAL ANSWER

0.0799360511590727 ≈ 0.079936 Milliampere <-- Drain Current

(Calculation completed in 00.004 seconds)

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Birsa Institute of Technology (BIT), Sindri

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< 15 Small Signal Analysis Calculators

Small Signal Voltage Gain with respect to Input Resistance

Go Voltage Gain = (Input Amplifier Resistance/(Input Amplifier Resistance+Self Induced Resistance))*((Source Resistance*Output Resistance)/(Source Resistance+Output Resistance))/(1/Transconductance+((Source Resistance*Output Resistance)/(Source Resistance+Output Resistance)))

Gate to Source Voltage with respect to Small Signal Resistance

Go Critical Voltage = Input Voltage*((1/Transconductance)/((1/Transconductance)*((Source Resistance*Small Signal Resistance)/(Source Resistance+Small Signal Resistance))))

Common Drain Output Voltage in Small Signal

Go Output Voltage = Transconductance*Critical Voltage*((Source Resistance*Small Signal Resistance)/(Source Resistance+Small Signal Resistance))

Output Voltage of Small Signal P-Channel

Go Output Voltage = Transconductance*Source to Gate Voltage*((Output Resistance*Drain Resistance)/(Drain Resistance+Output Resistance))

Voltage Gain for Small Signal

Go Voltage Gain = (Transconductance*(1/((1/Load Resistance)+(1/Drain Resistance))))/(1+(Transconductance*Self Induced Resistance))

Small-Signal Voltage Gain with respect to Drain Resistance

Go Voltage Gain = (Transconductance*((Output Resistance*Drain Resistance)/(Output Resistance+Drain Resistance)))

Output Current of Small Signal

Go Output Current = (Transconductance*Critical Voltage)*(Drain Resistance/(Load Resistance+Drain Resistance))

Input Current of Small Signal

Go Input Current Of Small Signal = (Critical Voltage*((1+Transconductance*Self Induced Resistance)/Self Induced Resistance))

Amplification Factor for Small Signal MOSFET Model

Go Amplification Factor = 1/Electron Mean Free Path*sqrt((2*Process Transconductance Parameter)/Drain Current)

Transconductance Given Small Signal Parameters

Go Transconductance = 2*Transconductance Parameter*(DC Component of Gate to Source Voltage-Total Voltage)

Gate to Source Voltage in Small Signal

Go Critical Voltage = Input Voltage/(1+Self Induced Resistance*Transconductance)

Voltage Gain using Small Signal

Go Voltage Gain = Transconductance*1/(1/Load Resistance+1/Finite Resistance)

Small Signal Output Voltage

Go Output Voltage = Transconductance*Source to Gate Voltage*Load Resistance

Drain Current of MOSFET Small Signal

Go Drain Current = 1/(Electron Mean Free Path*Output Resistance)

Amplification Factor in Small Signal MOSFET Model

Go Amplification Factor = Transconductance*Output Resistance

Drain Current of MOSFET Small Signal Formula

Drain Current = 1/(Electron Mean Free Path*Output Resistance)
i_d = 1/(λ*R_out)

Is MOSFET a symmetric device?

MOSFET is a symmetrical device, therefore the answer is yes. however if in your circuit design you have tied your body to one of the terminals, you would want that terminal to be the source.

How to Calculate Drain Current of MOSFET Small Signal?

Drain Current of MOSFET Small Signal calculator uses Drain Current = 1/(Electron Mean Free Path*Output Resistance) to calculate the Drain Current, Drain Current of MOSFET Small Signal is current entering drain terminal of NMOS, MOSFETs only switch current flowing in one direction; they have a diode between source and drain in the other direction (in other words, if the drain (on an N-channel device) falls below the voltage on the source, the current will flow from the source to the drain). Drain Current is denoted by i_d symbol.

How to calculate Drain Current of MOSFET Small Signal using this online calculator? To use this online calculator for Drain Current of MOSFET Small Signal, enter Electron Mean Free Path (λ) & Output Resistance (R_out) and hit the calculate button. Here is how the Drain Current of MOSFET Small Signal calculation can be explained with given input values -> 79.93605 = 1/(2.78*4500).

FAQ

What is Drain Current of MOSFET Small Signal?

Drain Current of MOSFET Small Signal is current entering drain terminal of NMOS, MOSFETs only switch current flowing in one direction; they have a diode between source and drain in the other direction (in other words, if the drain (on an N-channel device) falls below the voltage on the source, the current will flow from the source to the drain) and is represented as i_d = 1/(λ*R_out) or Drain Current = 1/(Electron Mean Free Path*Output Resistance). Electron Mean Free Path which represents the average distance an electron can travel without scattering with impurities, defeat, or other obstacles within the solid state device & Output resistance refers to the resistance of an electronic circuit to the flow of current when a load is connected to its output.

How to calculate Drain Current of MOSFET Small Signal?

Drain Current of MOSFET Small Signal is current entering drain terminal of NMOS, MOSFETs only switch current flowing in one direction; they have a diode between source and drain in the other direction (in other words, if the drain (on an N-channel device) falls below the voltage on the source, the current will flow from the source to the drain) is calculated using Drain Current = 1/(Electron Mean Free Path*Output Resistance). To calculate Drain Current of MOSFET Small Signal, you need Electron Mean Free Path (λ) & Output Resistance (R_out). With our tool, you need to enter the respective value for Electron Mean Free Path & Output Resistance 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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