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Transconductance of Small Signal Operation of BJT Amplifier Formula

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Transconductance is defined as an expression of the performance of a bipolar transistor or field-effect transistor. Check FAQs

g m = \frac{i c}{V th}

g_m - Transconductance?i_c - Collector Current?V_th - Threshold Voltage?

Transconductance of Small Signal Operation of BJT Amplifier Example

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Here is how the Transconductance of Small Signal Operation of BJT Amplifier equation looks like with Values.

Here is how the Transconductance of Small Signal Operation of BJT Amplifier equation looks like with Units.

Here is how the Transconductance of Small Signal Operation of BJT Amplifier equation looks like.

32.8571 = \frac{23}{0.7}

32.8571mS = \frac{23mA}{0.7V}

32.8571 = \frac{23}{0.7}

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Transconductance of Small Signal Operation of BJT Amplifier Solution

Follow our step by step solution on how to calculate Transconductance of Small Signal Operation of BJT Amplifier?

FIRST Step Consider the formula

g m = \frac{i c}{V th}

Next Step Substitute values of Variables

∴

g m = \frac{23mA}{0.7V}

Next Step Convert Units

∴

g m = \frac{0.023A}{0.7V}

Next Step Prepare to Evaluate

∴

g m = \frac{0.023}{0.7}

Next Step Evaluate

∴

g m = 0.0328571428571429S

Next Step Convert to Output's Unit

∴

g m = 32.8571428571429mS

LAST Step Rounding Answer

∴

g m = 32.8571mS

Transconductance of Small Signal Operation of BJT Amplifier Formula Elements

Variables

Transconductance

Transconductance is defined as an expression of the performance of a bipolar transistor or field-effect transistor.

Symbol: g_m

Measurement: Electric ConductanceUnit: mS

Note: Value should be greater than 0.

Formulas to find Transconductance

Collector Current

Collector Current is defined as the direct current that passes through the collector of a transistor.

Symbol: i_c

Measurement: Electric CurrentUnit: mA

Note: Value can be positive or negative.

Formulas to find Collector Current

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

Other formulas in Resistance category

Go Differential Input Resistance of BJT Amplifier

R id = \frac{V id}{i B}

Go Differential Input Resistance of BJT Amplifier given Small-Signal Input Resistance

R id = 2 \cdot R BE

Go Differential Input Resistance of BJT Amplifier given Common-Emitter Current Gain

R id = (β + 1) \cdot (2 \cdot R E + 2 \cdot ΔR c)

How to Evaluate Transconductance of Small Signal Operation of BJT Amplifier?

Transconductance of Small Signal Operation of BJT Amplifier evaluator uses Transconductance = Collector Current/Threshold Voltage to evaluate the Transconductance, The Transconductance of small signal operation of BJT Amplifier formula is defined as the change in the drain current divided by the small change in the gate/source voltage with a constant drain/source voltage. Typical values of g_m for a small-signal field-effect transistor are 1 to 30 millisiemens. Transconductance is denoted by g_m symbol.

How to evaluate Transconductance of Small Signal Operation of BJT Amplifier using this online evaluator? To use this online evaluator for Transconductance of Small Signal Operation of BJT Amplifier, enter Collector Current (i_c) & Threshold Voltage (V_th) and hit the calculate button.

FAQs on Transconductance of Small Signal Operation of BJT Amplifier

What is the formula to find Transconductance of Small Signal Operation of BJT Amplifier?

The formula of Transconductance of Small Signal Operation of BJT Amplifier is expressed as Transconductance = Collector Current/Threshold Voltage. Here is an example- 32857.14 = 0.023/0.7.

How to calculate Transconductance of Small Signal Operation of BJT Amplifier?

With Collector Current (i_c) & Threshold Voltage (V_th) we can find Transconductance of Small Signal Operation of BJT Amplifier using the formula - Transconductance = Collector Current/Threshold Voltage.

Can the Transconductance of Small Signal Operation of BJT Amplifier be negative?

No, the Transconductance of Small Signal Operation of BJT Amplifier, measured in Electric Conductance cannot be negative.

Which unit is used to measure Transconductance of Small Signal Operation of BJT Amplifier?

Transconductance of Small Signal Operation of BJT Amplifier is usually measured using the Millisiemens[mS] for Electric Conductance. Siemens[mS], Megasiemens[mS], Mho[mS] are the few other units in which Transconductance of Small Signal Operation of BJT Amplifier can be measured.

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