Base Current of MOSFET Calculator

✖The Bias Voltage in a MOSFET circuit is the voltage that is applied to the gate of the MOSFET to turn it on.ⓘ Bias Voltage [V_bb]			+10% -10%
✖Base Emitter Voltage is the voltage drop across the base-emitter junction of a bipolar junction transistor when it is forward biased.ⓘ Base Emitter Voltage [V_be]			+10% -10%
✖The Base Resistance in a MOSFET circuit is used to limit the amount of current that flows through the base of the MOSFET.ⓘ Base Resistance [R_b]			+10% -10%

✖Input Biasing current is the current that flows into an electrical device. It is measured in amperes (A).ⓘ Base Current of MOSFET [I _base]

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Formula

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Base Current of MOSFET

Formula

`"I "_{"base"} = ("V"_{"bb"}-"V"_{"be"})/"R"_{"b"}`

Example

`"0.178571mA"=("20V"-"10V")/"56kΩ"`

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Base Current of MOSFET Solution

STEP 0: Pre-Calculation Summary

Formula Used

Input Biasing Current = (Bias Voltage-Base Emitter Voltage)/Base Resistance
I _base = (V_bb-V_be)/R_b
This formula uses 4 Variables

Variables Used

Input Biasing Current - (Measured in Ampere) - Input Biasing current is the current that flows into an electrical device. It is measured in amperes (A).
Bias Voltage - (Measured in Volt) - The Bias Voltage in a MOSFET circuit is the voltage that is applied to the gate of the MOSFET to turn it on.
Base Emitter Voltage - (Measured in Volt) - Base Emitter Voltage is the voltage drop across the base-emitter junction of a bipolar junction transistor when it is forward biased.
Base Resistance - (Measured in Ohm) - The Base Resistance in a MOSFET circuit is used to limit the amount of current that flows through the base of the MOSFET.

STEP 1: Convert Input(s) to Base Unit

Bias Voltage: 20 Volt --> 20 Volt No Conversion Required
Base Emitter Voltage: 10 Volt --> 10 Volt No Conversion Required
Base Resistance: 56 Kilohm --> 56000 Ohm (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

I _base = (V_bb-V_be)/R_b --> (20-10)/56000

Evaluating ... ...

I _base = 0.000178571428571429

STEP 3: Convert Result to Output's Unit

0.000178571428571429 Ampere -->0.178571428571429 Milliampere (Check conversion here)

FINAL ANSWER

0.178571428571429 ≈ 0.178571 Milliampere <-- Input Biasing Current

(Calculation completed in 00.004 seconds)

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Created by Suma Madhuri

VIT University (VIT), Chennai

Suma Madhuri has created this Calculator and 50+ more calculators!

Verified by Passya Saikeshav Reddy

CVR COLLEGE OF ENGINEERING (CVR), India

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< 18 Biasing Calculators

Collector Current given Current Gain Mosfet

Go Collector Current = (Current Gain*(Negative Supply Voltage-Base Emitter Voltage))/(Base Resistance+(Current Gain+1)*Emitter Resistance)

Input Biasing Current of Mosfet

Go Input Biasing Current = (Negative Supply Voltage-Base Emitter Voltage)/(Base Resistance+(Current Gain+1)*Emitter Resistance)

Collector Emitter Voltage given Collector Resistance

Go Collector Emitter Voltage = Collector Supply Voltage-(Collector Current+Input Biasing Current)*Collector Load Resistor

Collector Current given Current Gain

Go Collector Current = Current Gain*(Collector Supply Voltage-Base Emitter Voltage)/Base Resistance

Collector Emitter Voltage

Go Collector Emitter Voltage = Collector Supply Voltage-Collector Load Resistor*Collector Current

DC Bias Current of MOSFET

Go DC Bias Current = 1/2*Transconductance Parameter*(Gate-Source Voltage-Threshold Voltage)^2

Collector Voltage with respect to Ground

Go Collector Voltage = Collector Supply Voltage-Collector Current*Collector Load Resistor

Emitter Voltage with respect to Ground

Go Emitter Voltage = -Negative Supply Voltage+(Emitter Current*Emitter Resistance)

Base Current of MOSFET

Go Input Biasing Current = (Bias Voltage-Base Emitter Voltage)/Base Resistance

DC Bias Output Voltage at Drain

Go Output Voltage = Supply Voltage-Load Resistance*DC Bias Current

Collector Current in Saturation

Go Collector Current Saturation = Collector Supply Voltage/Collector Load Resistor

DC Bias Current of MOSFET using Overdrive Voltage

Go DC Bias Current = 1/2*Transconductance Parameter*Effective Voltage^2

Input Bias Current

Go DC Bias Current = (Input Bias Current 1+Input Bias Current 2)/2

Bias Voltage of MOSFET

Go Total Instantaneous Bias Voltage = DC Bias Voltage+DC Voltage

Emitter Current of Mosfet

Go Emitter Current = Collector Current+Input Biasing Current

Collector Current of Mosfet

Go Collector Current = Current Gain*Input Biasing Current

Base Voltage with respect to Ground

Go Base Voltage = Emitter Voltage+Base Emitter Voltage

Bias Current in Differential Pair

Go DC Bias Current = Drain Current 1+Drain Current 2

Base Current of MOSFET Formula

Input Biasing Current = (Bias Voltage-Base Emitter Voltage)/Base Resistance
I _base = (V_bb-V_be)/R_b

Why is the base current of a MOSFET so low?

The base current of a MOSFET is so low because there is no significant flow of carriers between the gate and the other terminals of the device. The gate is typically insulated from the other terminals by a thin layer of oxide, so there is no direct path for current to flow.

How to Calculate Base Current of MOSFET?

Base Current of MOSFET calculator uses Input Biasing Current = (Bias Voltage-Base Emitter Voltage)/Base Resistance to calculate the Input Biasing Current, The Base Current of MOSFET formula is defined as current that flows into the base terminal of the MOSFET. A small increase in base current can cause a large increase in drain-source current. Input Biasing Current is denoted by I _base symbol.

How to calculate Base Current of MOSFET using this online calculator? To use this online calculator for Base Current of MOSFET, enter Bias Voltage (V_bb), Base Emitter Voltage (V_be) & Base Resistance (R_b) and hit the calculate button. Here is how the Base Current of MOSFET calculation can be explained with given input values -> 1.8E+8 = (20-10)/56000.

FAQ

What is Base Current of MOSFET?

The Base Current of MOSFET formula is defined as current that flows into the base terminal of the MOSFET. A small increase in base current can cause a large increase in drain-source current and is represented as I _base = (V_bb-V_be)/R_b or Input Biasing Current = (Bias Voltage-Base Emitter Voltage)/Base Resistance. The Bias Voltage in a MOSFET circuit is the voltage that is applied to the gate of the MOSFET to turn it on, Base Emitter Voltage is the voltage drop across the base-emitter junction of a bipolar junction transistor when it is forward biased & The Base Resistance in a MOSFET circuit is used to limit the amount of current that flows through the base of the MOSFET.

How to calculate Base Current of MOSFET?

The Base Current of MOSFET formula is defined as current that flows into the base terminal of the MOSFET. A small increase in base current can cause a large increase in drain-source current is calculated using Input Biasing Current = (Bias Voltage-Base Emitter Voltage)/Base Resistance. To calculate Base Current of MOSFET, you need Bias Voltage (V_bb), Base Emitter Voltage (V_be) & Base Resistance (R_b). With our tool, you need to enter the respective value for Bias Voltage, Base Emitter Voltage & Base Resistance and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Input Biasing Current?

In this formula, Input Biasing Current uses Bias Voltage, Base Emitter Voltage & Base Resistance. We can use 1 other way(s) to calculate the same, which is/are as follows -

Input Biasing Current = (Negative Supply Voltage-Base Emitter Voltage)/(Base Resistance+(Current Gain+1)*Emitter Resistance)

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