Gate to Source Capacitance of Source Follower Calculator

✖Transconductance is the ratio of the change in current at the output terminal to the change in the voltage at the input terminal of an active device.ⓘ Transconductance [g_m]			+10% -10%
✖The Transition Frequency associated with the transition (1 to 2 or 2 to 1) between two different vibrational levels.ⓘ Transition Frequency [f_tr]			+10% -10%

✖Gate to Source Capacitance is defined as the capacitance that is observed between the gate and Source of the Junction of MOSFET.ⓘ Gate to Source Capacitance of Source Follower [C_gs]

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Gate to Source Capacitance of Source Follower

Formula

`"C"_{"gs"} = "g"_{"m"}/"f"_{"tr"}`

Example

`"2.600217μF"="4.8mS"/"1846Hz"`

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Gate to Source Capacitance of Source Follower Solution

STEP 0: Pre-Calculation Summary

Formula Used

Gate to Source Capacitance = Transconductance/Transition Frequency
C_gs = g_m/f_tr
This formula uses 3 Variables

Variables Used

Gate to Source Capacitance - (Measured in Farad) - Gate to Source Capacitance is defined as the capacitance that is observed between the gate and Source of the Junction of MOSFET.
Transconductance - (Measured in Siemens) - Transconductance is the ratio of the change in current at the output terminal to the change in the voltage at the input terminal of an active device.
Transition Frequency - (Measured in Hertz) - The Transition Frequency associated with the transition (1 to 2 or 2 to 1) between two different vibrational levels.

STEP 1: Convert Input(s) to Base Unit

Transconductance: 4.8 Millisiemens --> 0.0048 Siemens (Check conversion here)
Transition Frequency: 1846 Hertz --> 1846 Hertz No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

C_gs = g_m/f_tr --> 0.0048/1846

Evaluating ... ...

C_gs = 2.60021668472373E-06

STEP 3: Convert Result to Output's Unit

2.60021668472373E-06 Farad -->2.60021668472373 Microfarad (Check conversion here)

FINAL ANSWER

2.60021668472373 ≈ 2.600217 Microfarad <-- Gate to Source Capacitance

(Calculation completed in 00.004 seconds)

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Created by Payal Priya

Birsa Institute of Technology (BIT), Sindri

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National Institute Of Technology (NIT), Hamirpur

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< 7 Response of Source and Emitter Follower Calculators

Constant 2 of Source Follower Transfer Function

Go Constant B = (((Gate to Source Capacitance+Gate to Drain Capacitance)*Capacitance+(Gate to Source Capacitance+Gate to Source Capacitance))/(Transconductance*Load Resistance+1))*Signal Resistance*Load Resistance

Signal Voltage in High Frequency Response of Source and Emitter Follower

Go Output Voltage = (Electric Current*Signal Resistance)+Gate to Source Voltage+Threshold Voltage

Transition Frequency of Source-Follower Transfer Function

Go Transition Frequency = Transconductance/Gate to Source Capacitance

Gate to Source Capacitance of Source Follower

Go Gate to Source Capacitance = Transconductance/Transition Frequency

Transconductance of Source-Follower

Go Transconductance = Transition Frequency*Gate to Source Capacitance

Dominant Pole-Frequency of Source-Follower

Go Frequency of Dominant Pole = 1/(2*pi*Constant B)

Break Frequency of Source Follower

Go Break Frequency = 1/sqrt(Constant C)

< 20 Multi Stage Amplifiers Calculators

Constant 2 of Source Follower Transfer Function

Gain Bandwidth Product

Go Gain Bandwidth Product = (Transconductance*Load Resistance)/(2*pi*Load Resistance*(Capacitance+Gate to Drain Capacitance))

3-DB Frequency in Design Insight and Trade-Off

Go 3 dB Frequency = 1/(2*pi*(Capacitance+Gate to Drain Capacitance)*(1/(1/Load Resistance+1/Output Resistance)))

Transconductance of CC-CB Amplifier

Go Transconductance = (2*Voltage Gain)/((Resistance/(Resistance+Signal Resistance))*Load Resistance)

Overall Voltage Gain of CC CB Amplifier

Go Voltage Gain = 1/2*(Resistance/(Resistance+Signal Resistance))*Load Resistance*Transconductance

Signal Voltage in High Frequency Response of Source and Emitter Follower

Go Output Voltage = (Electric Current*Signal Resistance)+Gate to Source Voltage+Threshold Voltage

Input Resistance of CC CB Amplifier

Go Resistance = (Common Emitter Current Gain+1)*(Emitter Resistance+Resistance of Secondary Winding in Primary)

Total Capacitance of CB-CG Amplifier

Go Capacitance = 1/(2*pi*Load Resistance*Output Pole Frequency)

Dominant Pole Frequency of Differential Amplifier

Go Pole Frequency = 1/(2*pi*Capacitance*Output Resistance)

Frequency of Differential Amplifier given Load Resistance

Go Frequency = 1/(2*pi*Load Resistance*Capacitance)

Short Circuit Transconductance of Differential Amplifier

Go Short Circuit Transconductance = Output Current/Differential Input Signal

Transition Frequency of Source-Follower Transfer Function

Go Transition Frequency = Transconductance/Gate to Source Capacitance

Gate to Source Capacitance of Source Follower

Go Gate to Source Capacitance = Transconductance/Transition Frequency

Transconductance of Source-Follower

Go Transconductance = Transition Frequency*Gate to Source Capacitance

Drain Resistance in Cascode Amplifier

Go Drain Resistance = 1/(1/Finite Input Resistance+1/Resistance)

Amplifier Gain given Function of Complex Frequency Variable

Go Amplifier Gain in Mid Band = Mid Band Gain*Gain Factor

Gain Factor

Go Gain Factor = Amplifier Gain in Mid Band/Mid Band Gain

Dominant Pole-Frequency of Source-Follower

Go Frequency of Dominant Pole = 1/(2*pi*Constant B)

Power Gain of Amplifier given Voltage Gain and Current Gain

Go Power Gain = Voltage Gain*Current Gain

Break Frequency of Source Follower

Go Break Frequency = 1/sqrt(Constant C)

Gate to Source Capacitance of Source Follower Formula

Gate to Source Capacitance = Transconductance/Transition Frequency
C_gs = g_m/f_tr

How does a source follower work?

A source follower, or common-drain amplifier, takes an input voltage applied to the gate and produces an output voltage at the source that follows the input, providing high input impedance, low output impedance, and unity voltage gain.

How to Calculate Gate to Source Capacitance of Source Follower?

Gate to Source Capacitance of Source Follower calculator uses Gate to Source Capacitance = Transconductance/Transition Frequency to calculate the Gate to Source Capacitance, Gate to Source Capacitance of Source Follower represents the inherent capacitance between the transistor's gate and source, affecting its high-frequency performance and input impedance characteristics. Gate to Source Capacitance is denoted by C_gs symbol.

How to calculate Gate to Source Capacitance of Source Follower using this online calculator? To use this online calculator for Gate to Source Capacitance of Source Follower, enter Transconductance (g_m) & Transition Frequency (f_tr) and hit the calculate button. Here is how the Gate to Source Capacitance of Source Follower calculation can be explained with given input values -> 2.6E+6 = 0.0048/1846.

FAQ

What is Gate to Source Capacitance of Source Follower?

Gate to Source Capacitance of Source Follower represents the inherent capacitance between the transistor's gate and source, affecting its high-frequency performance and input impedance characteristics and is represented as C_gs = g_m/f_tr or Gate to Source Capacitance = Transconductance/Transition Frequency. Transconductance is the ratio of the change in current at the output terminal to the change in the voltage at the input terminal of an active device & The Transition Frequency associated with the transition (1 to 2 or 2 to 1) between two different vibrational levels.

How to calculate Gate to Source Capacitance of Source Follower?

Gate to Source Capacitance of Source Follower represents the inherent capacitance between the transistor's gate and source, affecting its high-frequency performance and input impedance characteristics is calculated using Gate to Source Capacitance = Transconductance/Transition Frequency. To calculate Gate to Source Capacitance of Source Follower, you need Transconductance (g_m) & Transition Frequency (f_tr). With our tool, you need to enter the respective value for Transconductance & Transition Frequency and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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