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MOSFET Unity-Gain Frequency Formula

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Unity Gain Frequency in MOSFET refers to the frequency at which the voltage gain of the device drops to 1 (0dB) in a common-source configuration with a resistive load. Check FAQs

f t = \frac{g m}{C gs + C gd}

f_t - Unity Gain Frequency in MOSFET?g_m - Transconductance in MOSFET?C_gs - Gate Source Capacitance?C_gd - Gate Drain Capacitance?

MOSFET Unity-Gain Frequency Example

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Here is how the MOSFET Unity-Gain Frequency equation looks like with Values.

Here is how the MOSFET Unity-Gain Frequency equation looks like with Units.

Here is how the MOSFET Unity-Gain Frequency equation looks like.

37.415 = \frac{2.2}{56 + 2.8}

37.415kHz = \frac{2.2S}{56μF + 2.8μF}

37.415 = \frac{2.2}{56 + 2.8}

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MOSFET Unity-Gain Frequency Solution

Follow our step by step solution on how to calculate MOSFET Unity-Gain Frequency?

FIRST Step Consider the formula

f t = \frac{g m}{C gs + C gd}

Next Step Substitute values of Variables

∴

f t = \frac{2.2S}{56μF + 2.8μF}

Next Step Convert Units

∴

f t = \frac{2.2S}{5.6E-5F + 2.8E-6F}

Next Step Prepare to Evaluate

∴

f t = \frac{2.2}{5.6E-5 + 2.8E-6}

Next Step Evaluate

∴

f t = 37414.9659863946Hz

Next Step Convert to Output's Unit

∴

f t = 37.4149659863946kHz

LAST Step Rounding Answer

∴

f t = 37.415kHz

MOSFET Unity-Gain Frequency Formula Elements

Variables

Unity Gain Frequency in MOSFET

Unity Gain Frequency in MOSFET refers to the frequency at which the voltage gain of the device drops to 1 (0dB) in a common-source configuration with a resistive load.

Symbol: f_t

Measurement: FrequencyUnit: kHz

Note: Value should be greater than 0.

Formulas to find Unity Gain Frequency in MOSFET

Transconductance in MOSFET

Transconductance in MOSFET is a key parameter that describes the relationship between the input voltage and the output current.

Symbol: g_m

Measurement: Electric ConductanceUnit: S

Note: Value can be positive or negative.

Formulas to find Transconductance in MOSFET

Gate Source Capacitance

Gate Source Capacitance refers to the capacitance between the gate and source terminals of a field-effect transistor (FET).

Symbol: C_gs

Measurement: CapacitanceUnit: μF

Note: Value should be greater than 0.

Formulas to find Gate Source Capacitance

Gate Drain Capacitance

Gate Drain Capacitance refers to the capacitance between the gate and drain terminals of the device.

Symbol: C_gd

Measurement: CapacitanceUnit: μF

Note: Value should be greater than 0.

Formulas to find Gate Drain Capacitance

Other formulas in MOS IC Fabrication category

Go Body Effect in MOSFET

V t = V th + γ \cdot (\sqrt{2 \cdot Φ f + V bs} - \sqrt{2 \cdot Φ f})

Go Drain Current of MOSFET at Saturation Region

I d = \frac{β}{2} \cdot {(V gs - V th)}^{2} \cdot (1 + λ i \cdot V ds)

Go Channel Resistance

R ch = \frac{L t}{W t} \cdot \frac{1}{μ n \cdot Q on}

Go Propagation Time

T p = 0.7 \cdot N \cdot (\frac{N + 1}{2}) \cdot R m \cdot C l

How to Evaluate MOSFET Unity-Gain Frequency?

MOSFET Unity-Gain Frequency evaluator uses Unity Gain Frequency in MOSFET = Transconductance in MOSFET/(Gate Source Capacitance+Gate Drain Capacitance) to evaluate the Unity Gain Frequency in MOSFET, The MOSFET Unity-Gain Frequency refers to a critical parameter related to the high-frequency performance of MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) devices. It is the frequency at which the gain of the amplifier drops to 1, indicating that the output signal has the same magnitude as the input signal. Unity Gain Frequency in MOSFET is denoted by f_t symbol.

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

FAQs on MOSFET Unity-Gain Frequency

What is the formula to find MOSFET Unity-Gain Frequency?

The formula of MOSFET Unity-Gain Frequency is expressed as Unity Gain Frequency in MOSFET = Transconductance in MOSFET/(Gate Source Capacitance+Gate Drain Capacitance). Here is an example- 0.037415 = 2.2/(5.6E-05+2.8E-06).

How to calculate MOSFET Unity-Gain Frequency?

With Transconductance in MOSFET (g_m), Gate Source Capacitance (C_gs) & Gate Drain Capacitance (C_gd) we can find MOSFET Unity-Gain Frequency using the formula - Unity Gain Frequency in MOSFET = Transconductance in MOSFET/(Gate Source Capacitance+Gate Drain Capacitance).

Can the MOSFET Unity-Gain Frequency be negative?

No, the MOSFET Unity-Gain Frequency, measured in Frequency cannot be negative.

Which unit is used to measure MOSFET Unity-Gain Frequency?

MOSFET Unity-Gain Frequency is usually measured using the Kilohertz[kHz] for Frequency. Hertz[kHz], Petahertz[kHz], Terahertz[kHz] are the few other units in which MOSFET Unity-Gain Frequency can be measured.

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MOSFET Unity-Gain Frequency Formula

MOSFET Unity-Gain Frequency Example

MOSFET Unity-Gain Frequency Solution

MOSFET Unity-Gain Frequency Formula Elements

Other formulas in MOS IC Fabrication category

How to Evaluate MOSFET Unity-Gain Frequency?

FAQs on MOSFET Unity-Gain Frequency

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