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Input Offset Voltage of BJT Differential Amplifier Formula

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Input offset voltage is the voltage that must be applied between the two input terminals of the op-amp to obtain zero volts at the output. Check FAQs

V os = V th \cdot (\frac{ΔR c}{R C})

V_os - Input Offset Voltage?V_th - Threshold Voltage?ΔR_c - Change in Collector Resistance?R_C - Collector Resistance?

Input Offset Voltage of BJT Differential Amplifier Example

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Here is how the Input Offset Voltage of BJT Differential Amplifier equation looks like with Values.

Here is how the Input Offset Voltage of BJT Differential Amplifier equation looks like with Units.

Here is how the Input Offset Voltage of BJT Differential Amplifier equation looks like.

0.0087 = 0.7 \cdot (\frac{0.002}{0.16})

0.0087V = 0.7V \cdot (\frac{0.002kΩ}{0.16kΩ})

0.0087 = 0.7 \cdot (\frac{0.002}{0.16})

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Input Offset Voltage of BJT Differential Amplifier Solution

Follow our step by step solution on how to calculate Input Offset Voltage of BJT Differential Amplifier?

FIRST Step Consider the formula

V os = V th \cdot (\frac{ΔR c}{R C})

Next Step Substitute values of Variables

∴

V os = 0.7V \cdot (\frac{0.002kΩ}{0.16kΩ})

Next Step Convert Units

∴

V os = 0.7V \cdot (\frac{2Ω}{160Ω})

Next Step Prepare to Evaluate

∴

V os = 0.7 \cdot (\frac{2}{160})

Next Step Evaluate

∴

V os = 0.00875V

LAST Step Rounding Answer

∴

V os = 0.0087V

Input Offset Voltage of BJT Differential Amplifier Formula Elements

Variables

Input Offset Voltage

Input offset voltage is the voltage that must be applied between the two input terminals of the op-amp to obtain zero volts at the output.

Symbol: V_os

Measurement: Electric PotentialUnit: V

Note: Value can be positive or negative.

Formulas to find Input Offset Voltage

Threshold Voltage

Threshold Voltage is defined as the minimum amount of voltage required by the transistor to turn on.

Symbol: V_th

Measurement: Electric PotentialUnit: V

Note: Value can be positive or negative.

Formulas to find Threshold Voltage

Change in Collector Resistance

Change in Collector Resistance is the increment or decrement in resistance passing through the collector region.

Symbol: ΔR_c

Measurement: Electric ResistanceUnit: kΩ

Note: Value can be positive or negative.

Formulas to find Change in Collector Resistance

Collector Resistance

Collector Resistance helps to set the transistor at the "operating point" of the amplifier. The purpose of the emitter resistor Re is to prevent thermal runaway.

Symbol: R_C

Measurement: Electric ResistanceUnit: kΩ

Note: Value should be greater than 0.

Formulas to find Collector Resistance

Other formulas in DC Offset category

Go Common Mode Rejection Ratio of BJT Differential Amplifier in dB

CMRR = 20 \cdot \log 10 (mod \underset{̲}{u} s (\frac{A d}{A cm}))

Go Input Offset Current of Differential Amplifier

I os = mod \underset{̲}{u} s (I B1 - I B2)

Go Common Mode Gain of BJT Differential Amplifier

A cm = \frac{V od}{V id}

How to Evaluate Input Offset Voltage of BJT Differential Amplifier?

Input Offset Voltage of BJT Differential Amplifier evaluator uses Input Offset Voltage = Threshold Voltage*(Change in Collector Resistance/Collector Resistance) to evaluate the Input Offset Voltage, The Input Offset Voltage of BJT Differential Amplifier given collector resistance formula is defined as the voltage that must be applied between the two input terminals of the op-amp to obtain zero volts at the output. Ideally, the output of the op-amp should be at zero volts when the inputs are grounded. Input Offset Voltage is denoted by V_os symbol.

How to evaluate Input Offset Voltage of BJT Differential Amplifier using this online evaluator? To use this online evaluator for Input Offset Voltage of BJT Differential Amplifier, enter Threshold Voltage (V_th), Change in Collector Resistance (ΔR_c) & Collector Resistance (R_C) and hit the calculate button.

FAQs on Input Offset Voltage of BJT Differential Amplifier

What is the formula to find Input Offset Voltage of BJT Differential Amplifier?

The formula of Input Offset Voltage of BJT Differential Amplifier is expressed as Input Offset Voltage = Threshold Voltage*(Change in Collector Resistance/Collector Resistance). Here is an example- 0.00875 = 0.7*(2/160).

How to calculate Input Offset Voltage of BJT Differential Amplifier?

With Threshold Voltage (V_th), Change in Collector Resistance (ΔR_c) & Collector Resistance (R_C) we can find Input Offset Voltage of BJT Differential Amplifier using the formula - Input Offset Voltage = Threshold Voltage*(Change in Collector Resistance/Collector Resistance).

Can the Input Offset Voltage of BJT Differential Amplifier be negative?

Yes, the Input Offset Voltage of BJT Differential Amplifier, measured in Electric Potential can be negative.

Which unit is used to measure Input Offset Voltage of BJT Differential Amplifier?

Input Offset Voltage of BJT Differential Amplifier is usually measured using the Volt[V] for Electric Potential. Millivolt[V], Microvolt[V], Nanovolt[V] are the few other units in which Input Offset Voltage of BJT Differential Amplifier can be measured.

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Input Offset Voltage of BJT Differential Amplifier Formula

Input Offset Voltage of BJT Differential Amplifier Example

Input Offset Voltage of BJT Differential Amplifier Solution

Input Offset Voltage of BJT Differential Amplifier Formula Elements

Other formulas in DC Offset category

How to Evaluate Input Offset Voltage of BJT Differential Amplifier?

FAQs on Input Offset Voltage of BJT Differential Amplifier

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