Transconductance of Source-Follower Calculator

✖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 [C_gs]			+10% -10%

✖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 of Source-Follower [g_m]

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Formula

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Transconductance of Source-Follower

Formula

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

Example

`"4.7996mS"="1846Hz"*"2.6μF"`

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Transconductance of Source-Follower Solution

STEP 0: Pre-Calculation Summary

Formula Used

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

Variables Used

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.
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.

STEP 1: Convert Input(s) to Base Unit

Transition Frequency: 1846 Hertz --> 1846 Hertz No Conversion Required
Gate to Source Capacitance: 2.6 Microfarad --> 2.6E-06 Farad (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

g_m = f_tr*C_gs --> 1846*2.6E-06

Evaluating ... ...

g_m = 0.0047996

STEP 3: Convert Result to Output's Unit

0.0047996 Siemens -->4.7996 Millisiemens (Check conversion here)

FINAL ANSWER

4.7996 Millisiemens <-- Transconductance

(Calculation completed in 00.004 seconds)

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Home » Engineering » Electronics » Amplifiers » High Frequency Response Amplifiers » Response of Source and Emitter Follower » Transconductance of Source-Follower

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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)

Transconductance of Source-Follower Formula

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

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 Transconductance of Source-Follower?

Transconductance of Source-Follower calculator uses Transconductance = Transition Frequency*Gate to Source Capacitance to calculate the Transconductance, Transconductance of Source-Follower refers to its ability to convert input voltage changes into output current variations, quantifying its amplification capability without voltage gain. Transconductance is denoted by g_m symbol.

How to calculate Transconductance of Source-Follower using this online calculator? To use this online calculator for Transconductance of Source-Follower, enter Transition Frequency (f_tr) & Gate to Source Capacitance (C_gs) and hit the calculate button. Here is how the Transconductance of Source-Follower calculation can be explained with given input values -> 4799.6 = 1846*2.6E-06.

FAQ

What is Transconductance of Source-Follower?

Transconductance of Source-Follower refers to its ability to convert input voltage changes into output current variations, quantifying its amplification capability without voltage gain and is represented as g_m = f_tr*C_gs or Transconductance = Transition Frequency*Gate to Source Capacitance. The Transition Frequency associated with the transition (1 to 2 or 2 to 1) between two different vibrational levels & Gate to Source Capacitance is defined as the capacitance that is observed between the gate and Source of the Junction of MOSFET.

How to calculate Transconductance of Source-Follower?

Transconductance of Source-Follower refers to its ability to convert input voltage changes into output current variations, quantifying its amplification capability without voltage gain is calculated using Transconductance = Transition Frequency*Gate to Source Capacitance. To calculate Transconductance of Source-Follower, you need Transition Frequency (f_tr) & Gate to Source Capacitance (C_gs). With our tool, you need to enter the respective value for Transition Frequency & Gate to Source 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 Transconductance?

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

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

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