Lower Critical Frequency of Mosfet Calculator

✖Resistance is the opposition to current flow in an electrical circuit. It is measured in ohms . The higher the resistance, the more opposition there is to current flow.ⓘ Resistance [R_s]			+10% -10%
✖Input Resistance is the opposition to current flow in an electrical circuit. It is measured in ohms (Ω). The higher the resistance, the more opposition there is to current flow.ⓘ Input Resistance [R_in]			+10% -10%
✖Capacitance is the ability of a device to store electrical energy in the form of an electric charge.ⓘ Capacitance [c]			+10% -10%

✖Corner Frequency of a circuit is the frequency at which the gain of the circuit begins to decrease significantly.ⓘ Lower Critical Frequency of Mosfet [f_c]

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Lower Critical Frequency of Mosfet Solution

STEP 0: Pre-Calculation Summary

Formula Used

Corner Frequency = 1/(2*pi*(Resistance+Input Resistance)*Capacitance)
f_c = 1/(2*pi*(R_s+R_in)*c)
This formula uses 1 Constants, 4 Variables

Constants Used

pi - Archimedes' constant Value Taken As 3.14159265358979323846264338327950288

Variables Used

Corner Frequency - (Measured in Hertz) - Corner Frequency of a circuit is the frequency at which the gain of the circuit begins to decrease significantly.
Resistance - (Measured in Ohm) - Resistance is the opposition to current flow in an electrical circuit. It is measured in ohms . The higher the resistance, the more opposition there is to current flow.
Input Resistance - (Measured in Ohm) - Input Resistance is the opposition to current flow in an electrical circuit. It is measured in ohms (Ω). The higher the resistance, the more opposition there is to current flow.
Capacitance - (Measured in Farad) - Capacitance is the ability of a device to store electrical energy in the form of an electric charge.

STEP 1: Convert Input(s) to Base Unit

Resistance: 7.9 Ohm --> 7.9 Ohm No Conversion Required
Input Resistance: 200 Ohm --> 200 Ohm No Conversion Required
Capacitance: 4.78 Farad --> 4.78 Farad No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

f_c = 1/(2*pi*(R_s+R_in)*c) --> 1/(2*pi*(7.9+200)*4.78)

Evaluating ... ...

f_c = 0.000160153983641853

STEP 3: Convert Result to Output's Unit

0.000160153983641853 Hertz --> No Conversion Required

FINAL ANSWER

0.000160153983641853 ≈ 0.00016 Hertz <-- Corner Frequency

(Calculation completed in 00.004 seconds)

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Home » Engineering » Electronics » MOSFET » Analog Electronics » Internal Capacitive Effects and High Frequency Model » Lower Critical Frequency of Mosfet

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Created by Suma Madhuri

VIT University (VIT), Chennai

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Vellore Institute of Technology (VIT Vellore), Vellore

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< Internal Capacitive Effects and High Frequency Model Calculators

Transition Frequency of MOSFET

LaTeX Go Transition Frequency = Transconductance/(2*pi*(Source Gate Capacitance+Gate-Drain Capacitance))

Total Capacitance between Gate and Channel of MOSFETs

LaTeX Go Gate Channel Capacitance = Oxide Capacitance*Channel Width*Channel Length

Gate to Source Channel Width of MOSFET

LaTeX Go Channel Width = Overlap Capacitance/(Oxide Capacitance*Overlap Length)

Overlap Capacitance of MOSFET

LaTeX Go Overlap Capacitance = Channel Width*Oxide Capacitance*Overlap Length

Lower Critical Frequency of Mosfet Formula

LaTeX Go

Corner Frequency = 1/(2*pi*(Resistance+Input Resistance)*Capacitance)
f_c = 1/(2*pi*(R_s+R_in)*c)

What factors affect the corner frequency of a MOSFET?

The corner frequency of a MOSFET is affected by the following factors:

Gate-drain capacitance : The gate-drain capacitance is a parasitic capacitance that exists between the gate and drain terminals of a MOSFET. It is caused by the overlap of the gate and drain regions. The higher the gate-drain capacitance, the lower the corner frequency.
Source resistance : The source resistance is the resistance of the source lead of the MOSFET. The higher the source resistance, the higher the corner frequency.

How to Calculate Lower Critical Frequency of Mosfet?

Lower Critical Frequency of Mosfet calculator uses Corner Frequency = 1/(2*pi*(Resistance+Input Resistance)*Capacitance) to calculate the Corner Frequency, The Lower Critical Frequency of Mosfet formula is defined as the capacitive and inductive reactances in the circuit. At low frequencies, the capacitive and inductive reactances are low, so they have little effect on the gain of the circuit. Corner Frequency is denoted by f_c symbol.

How to calculate Lower Critical Frequency of Mosfet using this online calculator? To use this online calculator for Lower Critical Frequency of Mosfet, enter Resistance (R_s), Input Resistance (R_in) & Capacitance (c) and hit the calculate button. Here is how the Lower Critical Frequency of Mosfet calculation can be explained with given input values -> 0.00016 = 1/(2*pi*(7.9+200)*4.78).

FAQ

What is Lower Critical Frequency of Mosfet?

The Lower Critical Frequency of Mosfet formula is defined as the capacitive and inductive reactances in the circuit. At low frequencies, the capacitive and inductive reactances are low, so they have little effect on the gain of the circuit and is represented as f_c = 1/(2*pi*(R_s+R_in)*c) or Corner Frequency = 1/(2*pi*(Resistance+Input Resistance)*Capacitance). Resistance is the opposition to current flow in an electrical circuit. It is measured in ohms . The higher the resistance, the more opposition there is to current flow, Input Resistance is the opposition to current flow in an electrical circuit. It is measured in ohms (Ω). The higher the resistance, the more opposition there is to current flow & Capacitance is the ability of a device to store electrical energy in the form of an electric charge.

How to calculate Lower Critical Frequency of Mosfet?

The Lower Critical Frequency of Mosfet formula is defined as the capacitive and inductive reactances in the circuit. At low frequencies, the capacitive and inductive reactances are low, so they have little effect on the gain of the circuit is calculated using Corner Frequency = 1/(2*pi*(Resistance+Input Resistance)*Capacitance). To calculate Lower Critical Frequency of Mosfet, you need Resistance (R_s), Input Resistance (R_in) & Capacitance (c). With our tool, you need to enter the respective value for Resistance, Input Resistance & Capacitance and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Corner Frequency?

In this formula, Corner Frequency uses Resistance, Input Resistance & Capacitance. We can use 1 other way(s) to calculate the same, which is/are as follows -

Corner Frequency = 1/(2*pi*Input Resistance*Miller Capacitance)

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