Output Resistance of BJT Calculator

✖Supply Voltage is the input voltage source that flows through the BJT.ⓘ Supply Voltage [V_DD]			+10% -10%
✖Collector-Emitter Voltage is the electric potential between the base and collector region of a transistor.ⓘ Collector-Emitter Voltage [V_CE]			+10% -10%
✖Collector current is an amplified output current of a bipolar junction transistor.ⓘ Collector Current [I_c]			+10% -10%

✖Resistance is a measure of the opposition to current flow in an electrical circuit. Its S.I unit is ohm.ⓘ Output Resistance of BJT [R]

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Formula

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Output Resistance of BJT

Formula

`"R" = ("V"_{"DD"}+"V"_{"CE"})/"I"_{"c"}`

Example

`"1.13kΩ"=("2.5V"+"3.15V")/"5mA"`

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Output Resistance of BJT Solution

STEP 0: Pre-Calculation Summary

Formula Used

Resistance = (Supply Voltage+Collector-Emitter Voltage)/Collector Current
R = (V_DD+V_CE)/I_c
This formula uses 4 Variables

Variables Used

Resistance - (Measured in Ohm) - Resistance is a measure of the opposition to current flow in an electrical circuit. Its S.I unit is ohm.
Supply Voltage - (Measured in Volt) - Supply Voltage is the input voltage source that flows through the BJT.
Collector-Emitter Voltage - (Measured in Volt) - Collector-Emitter Voltage is the electric potential between the base and collector region of a transistor.
Collector Current - (Measured in Ampere) - Collector current is an amplified output current of a bipolar junction transistor.

STEP 1: Convert Input(s) to Base Unit

Supply Voltage: 2.5 Volt --> 2.5 Volt No Conversion Required
Collector-Emitter Voltage: 3.15 Volt --> 3.15 Volt No Conversion Required
Collector Current: 5 Milliampere --> 0.005 Ampere (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

R = (V_DD+V_CE)/I_c --> (2.5+3.15)/0.005

Evaluating ... ...

R = 1130

STEP 3: Convert Result to Output's Unit

1130 Ohm -->1.13 Kilohm (Check conversion here)

FINAL ANSWER

1.13 Kilohm <-- Resistance

(Calculation completed in 00.004 seconds)

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Created by Payal Priya

Birsa Institute of Technology (BIT), Sindri

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< 15 Resistance Calculators

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Go Input Resistance = (1/Transconductance)+(Load Resistance/(Transconductance*Finite Output Resistance))

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Go Output Resistance = (1+(Transconductance*Resistance))*Finite Output Resistance

Output Resistance of BJT

Go Resistance = (Supply Voltage+Collector-Emitter Voltage)/Collector Current

Small-Signal Input Resistance between Base and Emitter using Transconductance

Go Signal Resistance = Common Emitter Current Gain/Transconductance

Output Resistance of Transistor when Base Current is Constant

Go Resistance = -(Collector-Emitter Voltage/Collector Current)

Emitter Resistance given Threshold Voltage

Go Emitter Resistance = Threshold Voltage/Emitter Current

Emitter Resistance given Emitter Current

Go Emitter Resistance = Threshold Voltage/Emitter Current

Output Resistance of Simple Current BJT given Early Voltage

Go Output Resistance = Supply Voltage/Reference Current

Small-Signal Input Resistance between Base and Emitter using Base Current

Go Signal Resistance = Threshold Voltage/Base Current

Output Resistance of Current Source given Device Parameter

Go Output Resistance = Device Parameter/Drain Current

Output Resistance of Simple Current BJT

Go Output Resistance = Supply Voltage/Output Current

Small-Signal Input Resistance given Emitter Current

Go Small Signal = Signal Current*Emitter Resistance

Emitter Resistance of BJT

Go Emitter Resistance = Small Signal/Signal Current

Input Resistance of BJT

Go Input Resistance = Input Voltage/Signal Current

Small-Signal Input Resistance between Base and Emitter

Go Signal Resistance = Input Voltage/Base Current

< 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

Output Resistance of BJT Formula

Resistance = (Supply Voltage+Collector-Emitter Voltage)/Collector Current
R = (V_DD+V_CE)/I_c

Define the dynamic output resistance of a transistor amplifier in common - emitter configuration.

For a constant base current IB, the dynamic output resistance (r₀ is defined as the ratio of the differential change in the collector-to-emitter voltage (ΔV_CE) to the corresponding change in the collector current (ΔI_c).

How to Calculate Output Resistance of BJT?

Output Resistance of BJT calculator uses Resistance = (Supply Voltage+Collector-Emitter Voltage)/Collector Current to calculate the Resistance, The Output resistance of BJT is the ratio of voltage to the current flowing in or out of these terminals. Resistance is denoted by R symbol.

How to calculate Output Resistance of BJT using this online calculator? To use this online calculator for Output Resistance of BJT, enter Supply Voltage (V_DD), Collector-Emitter Voltage (V_CE) & Collector Current (I_c) and hit the calculate button. Here is how the Output Resistance of BJT calculation can be explained with given input values -> 0.00113 = (2.5+3.15)/0.005.

FAQ

What is Output Resistance of BJT?

The Output resistance of BJT is the ratio of voltage to the current flowing in or out of these terminals and is represented as R = (V_DD+V_CE)/I_c or Resistance = (Supply Voltage+Collector-Emitter Voltage)/Collector Current. Supply Voltage is the input voltage source that flows through the BJT, Collector-Emitter Voltage is the electric potential between the base and collector region of a transistor & Collector current is an amplified output current of a bipolar junction transistor.

How to calculate Output Resistance of BJT?

The Output resistance of BJT is the ratio of voltage to the current flowing in or out of these terminals is calculated using Resistance = (Supply Voltage+Collector-Emitter Voltage)/Collector Current. To calculate Output Resistance of BJT, you need Supply Voltage (V_DD), Collector-Emitter Voltage (V_CE) & Collector Current (I_c). With our tool, you need to enter the respective value for Supply Voltage, Collector-Emitter Voltage & Collector 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 Resistance?

In this formula, Resistance uses Supply Voltage, Collector-Emitter Voltage & Collector Current. We can use 1 other way(s) to calculate the same, which is/are as follows -

Resistance = -(Collector-Emitter Voltage/Collector Current)

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