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Transition Frequency of MOSFET Formula

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The Transition frequency is a term that describes the rate or frequency at which a change or transition occurs from one state to another. Check FAQs

f t = \frac{g m}{2 \cdot π \cdot (C sg + C gd)}

f_t - Transition Frequency?g_m - Transconductance?C_sg - Source Gate Capacitance?C_gd - Gate-Drain Capacitance?π - Archimedes' constant?

Transition Frequency of MOSFET Example

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Here is how the Transition Frequency of MOSFET equation looks like with Values.

Here is how the Transition Frequency of MOSFET equation looks like with Units.

Here is how the Transition Frequency of MOSFET equation looks like.

5.2492 = \frac{0.5}{2 \cdot 3.1416 \cdot (8.16 + 7)}

5.2492Hz = \frac{0.5mS}{2 \cdot 3.1416 \cdot (8.16μF + 7μF)}

5.2492 = \frac{0.5}{2 \cdot 3.1416 \cdot (8.16 + 7)}

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Transition Frequency of MOSFET Solution

Follow our step by step solution on how to calculate Transition Frequency of MOSFET?

FIRST Step Consider the formula

f t = \frac{g m}{2 \cdot π \cdot (C sg + C gd)}

Next Step Substitute values of Variables

∴

f t = \frac{0.5mS}{2 \cdot π \cdot (8.16μF + 7μF)}

Next Step Substitute values of Constants

∴

f t = \frac{0.5mS}{2 \cdot 3.1416 \cdot (8.16μF + 7μF)}

Next Step Convert Units

∴

f t = \frac{0.0005S}{2 \cdot 3.1416 \cdot (8.2E-6F + 7E-6F)}

Next Step Prepare to Evaluate

∴

f t = \frac{0.0005}{2 \cdot 3.1416 \cdot (8.2E-6 + 7E-6)}

Next Step Evaluate

∴

f t = 5.24917358482504Hz

LAST Step Rounding Answer

∴

f t = 5.2492Hz

Transition Frequency of MOSFET Formula Elements

Variables

Constants

Transition Frequency

The Transition frequency is a term that describes the rate or frequency at which a change or transition occurs from one state to another.

Symbol: f_t

Measurement: FrequencyUnit: Hz

Note: Value should be greater than 0.

Formulas to find Transition Frequency

Transconductance

Transconductance is defined as the ratio of the change in the output current to the change in the input voltage, with the gate-source voltage held constant.

Symbol: g_m

Measurement: Electric ConductanceUnit: mS

Note: Value can be positive or negative.

Formulas to find Transconductance

Source Gate Capacitance

The source gate capacitance is a measure of the capacitance between the source and gate electrodes in a field-effect transistor (FET).

Symbol: C_sg

Measurement: CapacitanceUnit: μF

Note: Value should be greater than 0.

Formulas to find Source Gate Capacitance

Gate-Drain Capacitance

Gate-drain capacitance is a parasitic capacitance that exists between the gate and drain electrodes of a field-effect transistor (FET).

Symbol: C_gd

Measurement: CapacitanceUnit: μF

Note: Value should be greater than 0.

Formulas to find Gate-Drain Capacitance

Archimedes' constant

Archimedes' constant is a mathematical constant that represents the ratio of the circumference of a circle to its diameter.

Symbol: π

Value: 3.14159265358979323846264338327950288

Other formulas in Internal Capacitive Effects and High Frequency Model category

Go Maximum Voltage Gain at Bias Point

A vm = 2 \cdot \frac{V dd - V eff}{V eff}

Go Maximum Voltage Gain given all Voltages

A vm = \frac{V dd - 0.3}{V t}

Go Voltage Gain given Drain Voltage

A v = \frac{i d \cdot R L \cdot 2}{V eff}

Go Voltage Gain given Load Resistance of MOSFET

A v = g m \cdot \frac{\frac{1}{\frac{1}{R L} + \frac{1}{R out}}}{1 + g m \cdot R s}

How to Evaluate Transition Frequency of MOSFET?

Transition Frequency of MOSFET evaluator uses Transition Frequency = Transconductance/(2*pi*(Source Gate Capacitance+Gate-Drain Capacitance)) to evaluate the Transition Frequency, The Transition frequency of MOSFET formula is defined as a measure of the high-frequency operating characteristics of a transistor. The frequency of the radiation associated with a transition between hyperfine structure energy states of an atom. Transition Frequency is denoted by f_t symbol.

How to evaluate Transition Frequency of MOSFET using this online evaluator? To use this online evaluator for Transition Frequency of MOSFET, enter Transconductance (g_m), Source Gate Capacitance (C_sg) & Gate-Drain Capacitance (C_gd) and hit the calculate button.

FAQs on Transition Frequency of MOSFET

What is the formula to find Transition Frequency of MOSFET?

The formula of Transition Frequency of MOSFET is expressed as Transition Frequency = Transconductance/(2*pi*(Source Gate Capacitance+Gate-Drain Capacitance)). Here is an example- 5.249174 = 0.0005/(2*pi*(8.16E-06+7E-06)).

How to calculate Transition Frequency of MOSFET?

With Transconductance (g_m), Source Gate Capacitance (C_sg) & Gate-Drain Capacitance (C_gd) we can find Transition Frequency of MOSFET using the formula - Transition Frequency = Transconductance/(2*pi*(Source Gate Capacitance+Gate-Drain Capacitance)). This formula also uses Archimedes' constant .

Can the Transition Frequency of MOSFET be negative?

No, the Transition Frequency of MOSFET, measured in Frequency cannot be negative.

Which unit is used to measure Transition Frequency of MOSFET?

Transition Frequency of MOSFET is usually measured using the Hertz[Hz] for Frequency. Petahertz[Hz], Terahertz[Hz], Gigahertz[Hz] are the few other units in which Transition Frequency of MOSFET can be measured.

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Transition Frequency of MOSFET Formula

Transition Frequency of MOSFET Example

Transition Frequency of MOSFET Solution

Transition Frequency of MOSFET Formula Elements

Other formulas in Internal Capacitive Effects and High Frequency Model category

How to Evaluate Transition Frequency of MOSFET?

FAQs on Transition Frequency of MOSFET

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