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 = \frac{V DD + V CE}{I c}

Example

1.13 kΩ = \frac{2.5 V + 3.15 V}{5 mA}

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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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Birsa Institute of Technology (BIT), Sindri

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< Resistance Calculators

Small-Signal Input Resistance between Base and Emitter using Transconductance

Go Signal Resistance = Common Emitter Current Gain/Transconductance

Emitter Resistance given Threshold Voltage

Go Emitter Resistance = Threshold Voltage/Emitter Current

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

Go Signal Resistance = Threshold Voltage/Base Current

Small-Signal Input Resistance between Base and Emitter

Go Signal Resistance = Input Voltage/Base Current

< BJT Circuit Calculators

Total Power Dissipated in BJT

Go Power = Collector-Emitter Voltage*Collector Current+Base-Emitter Voltage*Base Current

Common Mode Rejection Ratio

Go Common Mode Rejection Ratio = 20*log10(Differential Mode Gain/Common Mode Gain)

Common-Base Current Gain

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

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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