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Reference Current of BJT Mirror Formula

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A Reference Current is just a stable source of current that does not fluctuate over temperature, supply voltages or loads. Check FAQs

I ref = I c + \frac{2 \cdot I c}{β}

I_ref - Reference Current?I_c - Collector Current?β - Common Emitter Current Gain?

Reference Current of BJT Mirror Example

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With units

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Here is how the Reference Current of BJT Mirror equation looks like with Values.

Here is how the Reference Current of BJT Mirror equation looks like with Units.

Here is how the Reference Current of BJT Mirror equation looks like.

5.1538 = 5 + \frac{2 \cdot 5}{65}

5.1538mA = 5mA + \frac{2 \cdot 5mA}{65}

5.1538 = 5 + \frac{2 \cdot 5}{65}

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Reference Current of BJT Mirror Solution

Follow our step by step solution on how to calculate Reference Current of BJT Mirror?

FIRST Step Consider the formula

I ref = I c + \frac{2 \cdot I c}{β}

Next Step Substitute values of Variables

∴

I ref = 5mA + \frac{2 \cdot 5mA}{65}

Next Step Convert Units

∴

I ref = 0.005A + \frac{2 \cdot 0.005A}{65}

Next Step Prepare to Evaluate

∴

I ref = 0.005 + \frac{2 \cdot 0.005}{65}

Next Step Evaluate

∴

I ref = 0.00515384615384615A

Next Step Convert to Output's Unit

∴

I ref = 5.15384615384615mA

LAST Step Rounding Answer

∴

I ref = 5.1538mA

Reference Current of BJT Mirror Formula Elements

Variables

Reference Current

A Reference Current is just a stable source of current that does not fluctuate over temperature, supply voltages or loads.

Symbol: I_ref

Measurement: Electric CurrentUnit: mA

Note: Value can be positive or negative.

Formulas to find Reference Current

Collector Current

Collector current is an amplified output current of a bipolar junction transistor.

Symbol: I_c

Measurement: Electric CurrentUnit: mA

Note: Value can be positive or negative.

Formulas to find Collector Current

Common Emitter Current Gain

Common emitter current gain is influenced by 2 factors: width of base region W, and relative dopings of base region and emitter region. Its range varies from 50-200.

Symbol: β

Measurement: NAUnit: Unitless

Note: Value should be between 49 to 201.

Formulas to find Common Emitter Current Gain

Other formulas in Base Current category

Go Common-Base Current Gain

α = \frac{β}{β + 1}

Go Intrinsic Gain of BJT

A o = \frac{V A}{V t}

Go Total Power Dissipated in BJT

P = V CE \cdot I c + V BE \cdot I B

Go Common Mode Rejection Ratio

CMRR = 20 \cdot \log 10 (\frac{A d}{A cm})

How to Evaluate Reference Current of BJT Mirror?

Reference Current of BJT Mirror evaluator uses Reference Current = Collector Current+(2*Collector Current)/Common Emitter Current Gain to evaluate the Reference Current, The reference current of BJT Mirror is just a stable source of current that does not fluctuate over temperature, supply voltages, or loads. Reference Current is denoted by I_ref symbol.

How to evaluate Reference Current of BJT Mirror using this online evaluator? To use this online evaluator for Reference Current of BJT Mirror, enter Collector Current (I_c) & Common Emitter Current Gain (β) and hit the calculate button.

FAQs on Reference Current of BJT Mirror

What is the formula to find Reference Current of BJT Mirror?

The formula of Reference Current of BJT Mirror is expressed as Reference Current = Collector Current+(2*Collector Current)/Common Emitter Current Gain. Here is an example- 5153.846 = 0.005+(2*0.005)/65.

How to calculate Reference Current of BJT Mirror?

With Collector Current (I_c) & Common Emitter Current Gain (β) we can find Reference Current of BJT Mirror using the formula - Reference Current = Collector Current+(2*Collector Current)/Common Emitter Current Gain.

Can the Reference Current of BJT Mirror be negative?

Yes, the Reference Current of BJT Mirror, measured in Electric Current can be negative.

Which unit is used to measure Reference Current of BJT Mirror?

Reference Current of BJT Mirror is usually measured using the Milliampere[mA] for Electric Current. Ampere[mA], Microampere[mA], Centiampere[mA] are the few other units in which Reference Current of BJT Mirror can be measured.

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