Base Current of Input Differential BJT Amplifier given Emitter Resistance Calculator

✖Differential Input Voltage is defined as signal input circuit where SIGNAL LO and SIGNAL HI are electrically floating with respect to ANALOG GROUND.ⓘ Differential Input Voltage [V_id]			+10% -10%
✖Emitter Resistance is defined as the output impedance of a current source transistor.ⓘ Emitter Resistance [R_E]			+10% -10%
✖Common Emitter Current Gain is defined as the ratio of change in output current divided by change in input current.ⓘ Common Emitter Current Gain [β]			+10% -10%

✖Base Current 2 is a crucial current of bipolar junction transistor. Without the base current, the transistor cannot turn on.ⓘ Base Current of Input Differential BJT Amplifier given Emitter Resistance [i_B]

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Base Current of Input Differential BJT Amplifier given Emitter Resistance Solution

STEP 0: Pre-Calculation Summary

Formula Used

Base Current = Differential Input Voltage/(2*Emitter Resistance*(Common Emitter Current Gain+1))
i_B = V_id/(2*R_E*(β+1))
This formula uses 4 Variables

Variables Used

Base Current - (Measured in Ampere) - Base Current 2 is a crucial current of bipolar junction transistor. Without the base current, the transistor cannot turn on.
Differential Input Voltage - (Measured in Volt) - Differential Input Voltage is defined as signal input circuit where SIGNAL LO and SIGNAL HI are electrically floating with respect to ANALOG GROUND.
Emitter Resistance - (Measured in Ohm) - Emitter Resistance is defined as the output impedance of a current source transistor.
Common Emitter Current Gain - Common Emitter Current Gain is defined as the ratio of change in output current divided by change in input current.

STEP 1: Convert Input(s) to Base Unit

Differential Input Voltage: 7.5 Volt --> 7.5 Volt No Conversion Required
Emitter Resistance: 0.272 Kilohm --> 272 Ohm (Check conversion here)
Common Emitter Current Gain: 50 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

i_B = V_id/(2*R_E*(β+1)) --> 7.5/(2*272*(50+1))

Evaluating ... ...

i_B = 0.000270328719723183

STEP 3: Convert Result to Output's Unit

0.000270328719723183 Ampere -->0.270328719723183 Milliampere (Check conversion here)

FINAL ANSWER

0.270328719723183 ≈ 0.270329 Milliampere <-- Base Current

(Calculation completed in 00.020 seconds)

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< Current and Voltage Calculators

First Collector Current of BJT Differential Amplifier

LaTeX Go First Collector Current = (Common Base Current Gain*Current)/(1+e^((-Differential Input Voltage)/Threshold Voltage))

Maximum Input Common-Mode Range Voltage of BJT Differential Amplifier

LaTeX Go Maximum Common Mode Range = Input Voltage+(Common Base Current Gain*0.5*Current*Collector Resistance)

First Emitter Current of BJT Differential Amplifier

LaTeX Go First Emitter Current = Current/(1+e^((-Differential Input Voltage)/Threshold Voltage))

Collector Current of BJT Differential Amplifier given Emitter Current

LaTeX Go Collector Current = Common Base Current Gain*Emitter Current

Base Current of Input Differential BJT Amplifier given Emitter Resistance Formula

LaTeX Go

Base Current = Differential Input Voltage/(2*Emitter Resistance*(Common Emitter Current Gain+1))
i_B = V_id/(2*R_E*(β+1))

What is the input of differential amplifier?

The input signals to a differential amplifier, in general, contain two components; the 'common-mode' and 'difference-mode' signals. The common-mode signal is the average of the two input signals and the difference mode is the difference between the two input signals.

How to Calculate Base Current of Input Differential BJT Amplifier given Emitter Resistance?

Base Current of Input Differential BJT Amplifier given Emitter Resistance calculator uses Base Current = Differential Input Voltage/(2*Emitter Resistance*(Common Emitter Current Gain+1)) to calculate the Base Current, The Base current of input differential BJT Amplifier given emitter resistance formula is determined by the voltage applied to the base-emitter junction and the emitter resistance itself. Base Current is denoted by i_B symbol.

How to calculate Base Current of Input Differential BJT Amplifier given Emitter Resistance using this online calculator? To use this online calculator for Base Current of Input Differential BJT Amplifier given Emitter Resistance, enter Differential Input Voltage (V_id), Emitter Resistance (R_E) & Common Emitter Current Gain (β) and hit the calculate button. Here is how the Base Current of Input Differential BJT Amplifier given Emitter Resistance calculation can be explained with given input values -> 490.1961 = 7.5/(2*272*(50+1)).

FAQ

What is Base Current of Input Differential BJT Amplifier given Emitter Resistance?

The Base current of input differential BJT Amplifier given emitter resistance formula is determined by the voltage applied to the base-emitter junction and the emitter resistance itself and is represented as i_B = V_id/(2*R_E*(β+1)) or Base Current = Differential Input Voltage/(2*Emitter Resistance*(Common Emitter Current Gain+1)). Differential Input Voltage is defined as signal input circuit where SIGNAL LO and SIGNAL HI are electrically floating with respect to ANALOG GROUND, Emitter Resistance is defined as the output impedance of a current source transistor & Common Emitter Current Gain is defined as the ratio of change in output current divided by change in input current.

How to calculate Base Current of Input Differential BJT Amplifier given Emitter Resistance?

The Base current of input differential BJT Amplifier given emitter resistance formula is determined by the voltage applied to the base-emitter junction and the emitter resistance itself is calculated using Base Current = Differential Input Voltage/(2*Emitter Resistance*(Common Emitter Current Gain+1)). To calculate Base Current of Input Differential BJT Amplifier given Emitter Resistance, you need Differential Input Voltage (V_id), Emitter Resistance (R_E) & Common Emitter Current Gain (β). With our tool, you need to enter the respective value for Differential Input Voltage, Emitter Resistance & Common Emitter Current Gain 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 Differential Input Voltage, Emitter Resistance & Common Emitter Current Gain. We can use 1 other way(s) to calculate the same, which is/are as follows -

Base Current = Emitter Current/(Common Emitter Current Gain+1)

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