Base Current of PNP Transistor using Common-Base Current Gain Solution

STEP 0: Pre-Calculation Summary
Formula Used
Base Current = (1-Common-Base Current Gain)*Emitter Current
IB = (1-α)*Ie
This formula uses 3 Variables
Variables Used
Base Current - (Measured in Ampere) - Base Current is a crucial current of bipolar junction transistor. Without the base current, the transistor cannot turn on.
Common-Base Current Gain - Common-base current gain α is related to β common-emitter current gain and its value is less than 1 because collector current is always less than emitter current due to recombination of electrons.
Emitter Current - (Measured in Ampere) - Emitter Current is the amplified output current of a bipolar junction transistor.
STEP 1: Convert Input(s) to Base Unit
Common-Base Current Gain: 0.985 --> No Conversion Required
Emitter Current: 5.077 Milliampere --> 0.005077 Ampere (Check conversion here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
IB = (1-α)*Ie --> (1-0.985)*0.005077
Evaluating ... ...
IB = 7.61550000000001E-05
STEP 3: Convert Result to Output's Unit
7.61550000000001E-05 Ampere -->0.0761550000000001 Milliampere (Check conversion here)
FINAL ANSWER
0.0761550000000001 0.076155 Milliampere <-- Base Current
(Calculation completed in 00.004 seconds)

Credits

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Birsa Institute of Technology (BIT), Sindri
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14 Base Current Calculators

Base Current using Saturation Current in DC
Go Base Current = (Saturation Current/Common Emitter Current Gain)*e^(Base-Collector Voltage/Thermal Voltage)+Saturation Vapour Pressure*e^(Base-Collector Voltage/Thermal Voltage)
Saturation Current using Doping Concentration
Go Saturation Current = (Cross-section Area of Base-Emitter Junction*[Charge-e]*Electron Diffusivity*(Intrinsic Carrier Concentration)^2)/(Width of Base Junction*Doping Concentration of Base)
Short Circuit Current Gain of BJT
Go Short-Circuit Current Gain = (Common-Emitter Current Gain at Low Frequency)/(1+Complex Frequency Variable*(Emitter-Base Capacitance+Collector-Base Junction Capacitance)*Input Resistance)
Drain Current given Device Parameter
Go Drain Current = 1/2*Transconductance*Aspect Ratio*(Effective Voltage-Threshold Voltage)^2*(1+Device Parameter*Voltage between Drain and Source)
Base Current 2 of BJT
Go Base Current = (Saturation Current/Common Emitter Current Gain)*(e^(Base-Emitter Voltage/Thermal Voltage))
Base Current of PNP Transistor using Saturation Current
Go Base Current = (Saturation Current/Common Emitter Current Gain)*e^(Base-Emitter Voltage/Thermal Voltage)
Reference Current of BJT Mirror
Go Reference Current = Collector Current+(2*Collector Current)/Common Emitter Current Gain
Reference Current of BJT Current Mirror
Go Reference Current = (Supply Voltage-Base-Emitter Voltage)/Resistance
Reference Current of BJT Mirror given Collector Current
Go Reference Current = Collector Current*(1+2/Common Emitter Current Gain)
Base Current of PNP Transistor given Emitter Current
Go Base Current = Emitter Current/(Common Emitter Current Gain+1)
Base Current of PNP Transistor using Collector Current
Go Base Current = Collector Current/Common Emitter Current Gain
Base Current 1 of BJT
Go Base Current = Collector Current/Common Emitter Current Gain
Base Current of PNP Transistor using Common-Base Current Gain
Go Base Current = (1-Common-Base Current Gain)*Emitter Current
Total Base Current
Go Base Current = Base Current 1+Base Current 2

20 BJT Circuit Calculators

Transition Frequency of BJT
Go Transition Frequency = Transconductance/(2*pi*(Emitter-Base Capacitance+Collector-Base Junction Capacitance))
Base Current of PNP Transistor using Saturation Current
Go Base Current = (Saturation Current/Common Emitter Current Gain)*e^(Base-Emitter Voltage/Thermal Voltage)
Total Power Dissipated in BJT
Go Power = Collector-Emitter Voltage*Collector Current+Base-Emitter Voltage*Base Current
Unity-Gain Bandwidth of BJT
Go Unity-Gain Bandwidth = Transconductance/(Emitter-Base Capacitance+Collector-Base Junction Capacitance)
Reference Current of BJT Mirror
Go Reference Current = Collector Current+(2*Collector Current)/Common Emitter Current Gain
Common Mode Rejection Ratio
Go Common Mode Rejection Ratio = 20*log10(Differential Mode Gain/Common Mode Gain)
Output Resistance of BJT
Go Resistance = (Supply Voltage+Collector-Emitter Voltage)/Collector Current
Thermal Equilibrium Concentration of Minority Charge Carrier
Go Thermal Equilibrium Concentration = ((Intrinsic Carrier Density)^2)/Doping Concentration of Base
Output Voltage of BJT Amplifier
Go Output Voltage = Supply Voltage-Drain Current*Load Resistance
Total Power Supplied in BJT
Go Power = Supply Voltage*(Collector Current+Input Current)
Common-Base Current Gain
Go Common-Base Current Gain = Common Emitter Current Gain/(Common Emitter Current Gain+1)
Collector to Emitter Voltage at Saturation
Go Collector-Emitter Voltage = Base-Emitter Voltage-Base-Collector Voltage
Base Current of PNP Transistor given Emitter Current
Go Base Current = Emitter Current/(Common Emitter Current Gain+1)
Base Current of PNP Transistor using Collector Current
Go Base Current = Collector Current/Common Emitter Current Gain
Collector Current using Emitter Current
Go Collector Current = Common-Base Current Gain*Emitter Current
Base Current of PNP Transistor using Common-Base Current Gain
Go Base Current = (1-Common-Base Current Gain)*Emitter Current
Collector Current of BJT
Go Collector Current = Emitter Current-Base Current
Emitter Current of BJT
Go Emitter Current = Collector Current+Base Current
Short-Circuit Transconductance
Go Transconductance = Output Current/Input Voltage
Intrinsic Gain of BJT
Go Intrinsic Gain = Early Voltage/Thermal Voltage

Base Current of PNP Transistor using Common-Base Current Gain Formula

Base Current = (1-Common-Base Current Gain)*Emitter Current
IB = (1-α)*Ie

What is PNP transistor?

The transistor in which one n-type material is doped with two p-type materials such type of transistor is known as PNP transistor. The PNP transistor turns on when a small current flows through the base. The direction of current in the PNP transistor is from the emitter to the collector.

How to Calculate Base Current of PNP Transistor using Common-Base Current Gain?

Base Current of PNP Transistor using Common-Base Current Gain calculator uses Base Current = (1-Common-Base Current Gain)*Emitter Current to calculate the Base Current, The Base Current of PNP Transistor using Common-Base Current Gain is proportional to the number of electrons injected into the base. Base Current is denoted by IB symbol.

How to calculate Base Current of PNP Transistor using Common-Base Current Gain using this online calculator? To use this online calculator for Base Current of PNP Transistor using Common-Base Current Gain, enter Common-Base Current Gain (α) & Emitter Current (Ie) and hit the calculate button. Here is how the Base Current of PNP Transistor using Common-Base Current Gain calculation can be explained with given input values -> 76.155 = (1-0.985)*0.005077.

FAQ

What is Base Current of PNP Transistor using Common-Base Current Gain?
The Base Current of PNP Transistor using Common-Base Current Gain is proportional to the number of electrons injected into the base and is represented as IB = (1-α)*Ie or Base Current = (1-Common-Base Current Gain)*Emitter Current. Common-base current gain α is related to β common-emitter current gain and its value is less than 1 because collector current is always less than emitter current due to recombination of electrons & Emitter Current is the amplified output current of a bipolar junction transistor.
How to calculate Base Current of PNP Transistor using Common-Base Current Gain?
The Base Current of PNP Transistor using Common-Base Current Gain is proportional to the number of electrons injected into the base is calculated using Base Current = (1-Common-Base Current Gain)*Emitter Current. To calculate Base Current of PNP Transistor using Common-Base Current Gain, you need Common-Base Current Gain (α) & Emitter Current (Ie). With our tool, you need to enter the respective value for Common-Base Current Gain & Emitter Current 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 Base Current?
In this formula, Base Current uses Common-Base Current Gain & Emitter Current. We can use 10 other way(s) to calculate the same, which is/are as follows -
  • Base Current = Collector Current/Common Emitter Current Gain
  • Base Current = (Saturation Current/Common Emitter Current Gain)*(e^(Base-Emitter Voltage/Thermal Voltage))
  • Base Current = (Saturation Current/Common Emitter Current Gain)*e^(Base-Collector Voltage/Thermal Voltage)+Saturation Vapour Pressure*e^(Base-Collector Voltage/Thermal Voltage)
  • Base Current = Base Current 1+Base Current 2
  • Base Current = Collector Current/Common Emitter Current Gain
  • Base Current = (Saturation Current/Common Emitter Current Gain)*e^(Base-Emitter Voltage/Thermal Voltage)
  • Base Current = Emitter Current/(Common Emitter Current Gain+1)
  • Base Current = Emitter Current/(Common Emitter Current Gain+1)
  • Base Current = Collector Current/Common Emitter Current Gain
  • Base Current = (Saturation Current/Common Emitter Current Gain)*e^(Base-Emitter Voltage/Thermal Voltage)
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