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]

⎘ Copy

👎

Formula

✖

Lower Critical Frequency of Mosfet

Formula

`"f"_{"c"} = 1/(2*pi*("R"_{"s"}+"R"_{"in"})*"c")`

Example

`"0.00016Hz"=1/(2*pi*("7.9Ω"+"200Ω")*"4.78F")`

Calculator

LaTeX

Reset

👍

Download MOSFET Formula PDF PDF Image

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)

You are here -

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

Credits

Created by Suma Madhuri

VIT University (VIT), Chennai

Suma Madhuri has created this Calculator and 50+ more calculators!

Verified by Ritwik Tripathi

Vellore Institute of Technology (VIT Vellore), Vellore

Ritwik Tripathi has verified this Calculator and 100+ more calculators!

< 15 Internal Capacitive Effects and High Frequency Model Calculators

Conductance of Channel of MOSFETs

Go Conductance of Channel = Mobility of Electrons at Surface of Channel*Oxide Capacitance*(Channel Width/Channel Length)*Voltage across Oxide

Transition Frequency of MOSFET

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

Magnitude of Electron Charge in Channel of MOSFET

Go Electron Charge in Channel = Oxide Capacitance*Channel Width*Channel Length*Effective Voltage

Lower Critical Frequency of Mosfet

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

Phase Shift in Output RC Circuit

Go Phase Shift = arctan(Capacitive Reactance/(Resistance+Load Resistance))

Output Miller Capacitance Mosfet

Go Output Miller Capacitance = Gate-Drain Capacitance*((Voltage Gain+1)/Voltage Gain)

Total Capacitance between Gate and Channel of MOSFETs

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

Gate to Source Channel Width of MOSFET

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

Overlap Capacitance of MOSFET

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

Critical Frequency in High Frequency Input RC Circuit

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

Phase Shift in Input RC Circuit

Go Phase Shift = arctan(Capacitive Reactance/Input Resistance)

Capacitive Reactance of Mosfet

Go Capacitive Reactance = 1/(2*pi*Frequency*Capacitance)

Critical Frequency of Mosfet

Go Critical Frequency in decibles = 10*log10(Critical Frequency)

Miller Capacitance of Mosfet

Go Miller Capacitance = Gate-Drain Capacitance*(Voltage Gain+1)

Attenuation of RC Circuit

Go Attenuation = Base Voltage/Input Voltage

Lower Critical Frequency of Mosfet Formula

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)

Home

FREE PDFs

🔍 Search