Collector Current of Emitter Follower Transistor Calculator

✖Early voltage is entirely process-technology dependent, with the dimensions of volts per micron.Typically, V; falls in the range of 5 V/μm to 50 V/μm.ⓘ Early Voltage [V_a']			+10% -10%
✖The finite output resistance is a measure of how much the transistor's output impedance varies with changes in the output voltage.ⓘ Finite Output Resistance [R_out]			+10% -10%

✖Collector current is an amplified output current of a bipolar junction transistor.ⓘ Collector Current of Emitter Follower Transistor [i_c]

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Collector Current of Emitter Follower Transistor Solution

STEP 0: Pre-Calculation Summary

Formula Used

Collector Current = Early Voltage/Finite Output Resistance
i_c = V_a'/R_out
This formula uses 3 Variables

Variables Used

Collector Current - (Measured in Ampere) - Collector current is an amplified output current of a bipolar junction transistor.
Early Voltage - (Measured in Volt per Meter) - Early voltage is entirely process-technology dependent, with the dimensions of volts per micron.Typically, V; falls in the range of 5 V/μm to 50 V/μm.
Finite Output Resistance - (Measured in Ohm) - The finite output resistance is a measure of how much the transistor's output impedance varies with changes in the output voltage.

STEP 1: Convert Input(s) to Base Unit

Early Voltage: 13.85 Volt per Meter --> 13.85 Volt per Meter No Conversion Required
Finite Output Resistance: 0.35 Kilohm --> 350 Ohm (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

i_c = V_a'/R_out --> 13.85/350

Evaluating ... ...

i_c = 0.0395714285714286

STEP 3: Convert Result to Output's Unit

0.0395714285714286 Ampere -->39.5714285714286 Milliampere (Check conversion here)

FINAL ANSWER

39.5714285714286 ≈ 39.57143 Milliampere <-- Collector Current

(Calculation completed in 00.020 seconds)

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Created by Payal Priya

Birsa Institute of Technology (BIT), Sindri

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Vishwakarma Government Engineering College (VGEC), Ahmedabad

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< Emitter Follower Calculators

Output Resistance of Emitter Follower

LaTeX Go Finite Resistance = (1/Load Resistance+1/Small Signal Voltage+1/Emitter Resistance)+(1/Base Impedance+1/Signal Resistance)/(Collector Base Current Gain+1)

Collector Current in Active Region when Transistor Acts as Amplifier

LaTeX Go Collector Current = Saturation Current*e^(Voltage across Base Emitter Junction/Threshold Voltage)

Saturation Current of Emitter Follower

LaTeX Go Saturation Current = Collector Current/e^(Voltage across Base Emitter Junction/Threshold Voltage)

Input Resistance of Emitter Follower

LaTeX Go Input Resistance = 1/(1/Signal Resistance in Base+1/Base Resistance)

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Open Circuit Bipolar Cascode Voltage Gain

LaTeX Go Bipolar Cascode Voltage Gain = -MOSFET Primary Transconductance*(MOSFET Secondary Transconductance*Finite Output Resistance)*(1/Finite Output Resistance of Transistor 1+1/Small Signal Input Resistance)^-1

Drain Resistance of Cascode Amplifier

LaTeX Go Drain Resistance = (Output Voltage Gain/(MOSFET Primary Transconductance^2*Finite Output Resistance))

Output voltage gain of MOS Cascode Amplifier

LaTeX Go Output Voltage Gain = -MOSFET Primary Transconductance^2*Finite Output Resistance*Drain Resistance

Equivalent Resistance of Cascode Amplifier

LaTeX Go Resistance between Drain and Ground = (1/Finite Output Resistance of Transistor 1+1/Input Resistance)^-1

Collector Current of Emitter Follower Transistor Formula

LaTeX Go

Collector Current = Early Voltage/Finite Output Resistance
i_c = V_a'/R_out

Why common collector amplifier is called buffer?

A common collector amplifier, known as an emitter follower, is termed a buffer due to its ability to isolate input and output while maintaining voltage continuity, offering high input impedance and low output impedance, ideal for impedance matching and signal preservation in electronic circuits.

How to Calculate Collector Current of Emitter Follower Transistor?

Collector Current of Emitter Follower Transistor calculator uses Collector Current = Early Voltage/Finite Output Resistance to calculate the Collector Current, Collector Current of Emitter Follower Transistor refers to the flow of current from the collector (base) to the emitter (source) through the base-emitter junction. Collector Current is denoted by i_c symbol.

How to calculate Collector Current of Emitter Follower Transistor using this online calculator? To use this online calculator for Collector Current of Emitter Follower Transistor, enter Early Voltage (V_a') & Finite Output Resistance (R_out) and hit the calculate button. Here is how the Collector Current of Emitter Follower Transistor calculation can be explained with given input values -> 40000 = 13.85/350.

FAQ

What is Collector Current of Emitter Follower Transistor?

Collector Current of Emitter Follower Transistor refers to the flow of current from the collector (base) to the emitter (source) through the base-emitter junction and is represented as i_c = V_a'/R_out or Collector Current = Early Voltage/Finite Output Resistance. Early voltage is entirely process-technology dependent, with the dimensions of volts per micron.Typically, V; falls in the range of 5 V/μm to 50 V/μm & The finite output resistance is a measure of how much the transistor's output impedance varies with changes in the output voltage.

How to calculate Collector Current of Emitter Follower Transistor?

Collector Current of Emitter Follower Transistor refers to the flow of current from the collector (base) to the emitter (source) through the base-emitter junction is calculated using Collector Current = Early Voltage/Finite Output Resistance. To calculate Collector Current of Emitter Follower Transistor, you need Early Voltage (V_a') & Finite Output Resistance (R_out). With our tool, you need to enter the respective value for Early Voltage & Finite Output 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 Collector Current?

In this formula, Collector Current uses Early Voltage & Finite Output Resistance. We can use 2 other way(s) to calculate the same, which is/are as follows -

Collector Current = Saturation Current*e^(Voltage across Base Emitter Junction/Threshold Voltage)
Collector Current = Saturation Current*e^(Voltage across Base Emitter Junction/Threshold Voltage)

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