Input Bias Current Solution

STEP 0: Pre-Calculation Summary
Formula Used
DC Bias Current = (Input Bias Current 1+Input Bias Current 2)/2
Ib = (Ib1+Ib2)/2
This formula uses 3 Variables
Variables Used
DC Bias Current - (Measured in Ampere) - DC bias current is the constant current that flows through a circuit or device to establish a certain operating point or bias point.
Input Bias Current 1 - (Measured in Ampere) - 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.
Input Bias Current 2 - (Measured in Ampere) - 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.
STEP 1: Convert Input(s) to Base Unit
Input Bias Current 1: 12.58 Milliampere --> 0.01258 Ampere (Check conversion here)
Input Bias Current 2: 17.76 Milliampere --> 0.01776 Ampere (Check conversion here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Ib = (Ib1+Ib2)/2 --> (0.01258+0.01776)/2
Evaluating ... ...
Ib = 0.01517
STEP 3: Convert Result to Output's Unit
0.01517 Ampere -->15.17 Milliampere (Check conversion here)
FINAL ANSWER
15.17 Milliampere <-- DC Bias Current
(Calculation completed in 00.004 seconds)

Credits

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Jaipur Engineering College and Research Centre (JECRC), Jaipur
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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

Input Bias Current Formula

DC Bias Current = (Input Bias Current 1+Input Bias Current 2)/2
Ib = (Ib1+Ib2)/2

What is Condition for Input Bias Current

It should be emphasized that the input bias currents are independent of the fact that a real op amp has finite (though large) input resistance. The op-amp manufacturer usually specifies the average value of currents as well as their expected difference.

How to Calculate Input Bias Current?

Input Bias Current calculator uses DC Bias Current = (Input Bias Current 1+Input Bias Current 2)/2 to calculate 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 Ib symbol.

How to calculate Input Bias Current using this online calculator? To use this online calculator for Input Bias Current, enter Input Bias Current 1 (Ib1) & Input Bias Current 2 (Ib2) and hit the calculate button. Here is how the Input Bias Current calculation can be explained with given input values -> 15170 = (0.01258+0.01776)/2.

FAQ

What is Input Bias Current?
Input Bias Current is the average of the input current in the operational amplifier. It is denoted as IB and is represented as Ib = (Ib1+Ib2)/2 or DC Bias Current = (Input Bias Current 1+Input Bias Current 2)/2. 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 & 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.
How to calculate Input Bias Current?
Input Bias Current is the average of the input current in the operational amplifier. It is denoted as IB is calculated using DC Bias Current = (Input Bias Current 1+Input Bias Current 2)/2. To calculate Input Bias Current, you need Input Bias Current 1 (Ib1) & Input Bias Current 2 (Ib2). With our tool, you need to enter the respective value for Input Bias Current 1 & Input Bias Current 2 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 DC Bias Current?
In this formula, DC Bias Current uses Input Bias Current 1 & Input Bias Current 2. We can use 3 other way(s) to calculate the same, which is/are as follows -
  • 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
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