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Input Bias Current Formula

GoDC Bias Current of MOSFET using Overdrive Voltage Formula

GoDC Bias Current of MOSFET Formula

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DC bias current is the constant current that flows through a circuit or device to establish a certain operating point or bias point. Check FAQs

I b = \frac{I b1 + I b2}{2}

I_b - DC Bias Current?I_b1 - Input Bias Current 1?I_b2 - Input Bias Current 2?

Input Bias Current Example

With values

With units

Only example

Here is how the Input Bias Current equation looks like with Values.

Here is how the Input Bias Current equation looks like with Units.

Here is how the Input Bias Current equation looks like.

15.17 = \frac{12.58 + 17.76}{2}

15.17mA = \frac{12.58mA + 17.76mA}{2}

15.17 = \frac{12.58 + 17.76}{2}

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Input Bias Current Solution

Follow our step by step solution on how to calculate Input Bias Current?

FIRST Step Consider the formula

I b = \frac{I b1 + I b2}{2}

Next Step Substitute values of Variables

∴

I b = \frac{12.58mA + 17.76mA}{2}

Next Step Convert Units

∴

I b = \frac{0.0126A + 0.0178A}{2}

Next Step Prepare to Evaluate

∴

I b = \frac{0.0126 + 0.0178}{2}

Next Step Evaluate

∴

I b = 0.01517A

LAST Step Convert to Output's Unit

∴

I b = 15.17mA

Input Bias Current Formula Elements

Variables

DC Bias Current

DC bias current is the constant current that flows through a circuit or device to establish a certain operating point or bias point.

Symbol: I_b

Measurement: Electric CurrentUnit: mA

Note: Value should be greater than 0.

Formulas to find DC Bias Current

Input Bias Current 1

Input bias current 1 refers to the small electrical current that flows into an operational amplifier (op-amp) or other electronic device's input terminal when no signal is present.

Symbol: I_b1

Measurement: Electric CurrentUnit: mA

Note: Value can be positive or negative.

Formulas to find Input Bias Current 1

Input Bias Current 2

Input bias current 2 refers to the small electrical current that flows into an operational amplifier (op-amp) or other electronic device's input terminal when no signal is present.

Symbol: I_b2

Measurement: Electric CurrentUnit: mA

Note: Value should be greater than 0.

Formulas to find Input Bias Current 2

Other Formulas to find DC Bias Current

Go DC Bias Current of MOSFET using Overdrive Voltage

I b = \frac{1}{2} \cdot k n \cdot {V eff}^{2}

Go DC Bias Current of MOSFET

I b = \frac{1}{2} \cdot k n \cdot {(V gs - V th)}^{2}

Go Bias Current in Differential Pair

I b = I d1 + I d2

Other formulas in Biasing category

Go DC Bias Output Voltage at Drain

V out = V dd - R L \cdot I b

Go Bias Voltage of MOSFET

V be = V bias + V de

Go Base Current of MOSFET

I base = \frac{V bb - V be}{R b}

Go Collector Emitter Voltage

V ce = V cc - R c \cdot I c

How to Evaluate Input Bias Current?

Input Bias Current evaluator uses DC Bias Current = (Input Bias Current 1+Input Bias Current 2)/2 to evaluate the DC Bias Current, Input Bias Current is the average of the input current in the operational amplifier. It is denoted as IB. DC Bias Current is denoted by I_b symbol.

How to evaluate Input Bias Current using this online evaluator? To use this online evaluator for Input Bias Current, enter Input Bias Current 1 (I_b1) & Input Bias Current 2 (I_b2) and hit the calculate button.

FAQs on Input Bias Current

What is the formula to find Input Bias Current?

The formula of Input Bias Current is expressed as DC Bias Current = (Input Bias Current 1+Input Bias Current 2)/2. Here is an example- 15170 = (0.01258+0.01776)/2.

How to calculate Input Bias Current?

With Input Bias Current 1 (I_b1) & Input Bias Current 2 (I_b2) we can find Input Bias Current using the formula - DC Bias Current = (Input Bias Current 1+Input Bias Current 2)/2.

What are the other ways to Calculate DC Bias Current?

Here are the different ways to Calculate DC Bias Current-

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

Can the Input Bias Current be negative?

No, the Input Bias Current, measured in Electric Current cannot be negative.

Which unit is used to measure Input Bias Current?

Input Bias Current is usually measured using the Milliampere[mA] for Electric Current. Ampere[mA], Microampere[mA], Centiampere[mA] are the few other units in which Input Bias Current can be measured.

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Input Bias Current Formula

​GoDC Bias Current of MOSFET using Overdrive Voltage Formula

​GoDC Bias Current of MOSFET Formula

Input Bias Current Example

Input Bias Current Solution

Input Bias Current Formula Elements

Other Formulas to find DC Bias Current

Other formulas in Biasing category

How to Evaluate Input Bias Current?

FAQs on Input Bias Current

Variable Name

GoDC Bias Current of MOSFET using Overdrive Voltage Formula

GoDC Bias Current of MOSFET Formula