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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. Check FAQs
gm=ftrCgs
gm - Transconductance?ftr - Transition Frequency?Cgs - Gate to Source Capacitance?

Transconductance of Source-Follower Example

With values
With units
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Here is how the Transconductance of Source-Follower equation looks like with Values.

Here is how the Transconductance of Source-Follower equation looks like with Units.

Here is how the Transconductance of Source-Follower equation looks like.

4.7996Edit=1846Edit2.6Edit
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Transconductance of Source-Follower Solution

Follow our step by step solution on how to calculate Transconductance of Source-Follower?

FIRST Step Consider the formula
gm=ftrCgs
Next Step Substitute values of Variables
gm=1846Hz2.6μF
Next Step Convert Units
gm=1846Hz2.6E-6F
Next Step Prepare to Evaluate
gm=18462.6E-6
Next Step Evaluate
gm=0.0047996S
LAST Step Convert to Output's Unit
gm=4.7996mS

Transconductance of Source-Follower Formula Elements

Variables
Transconductance
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.
Symbol: gm
Measurement: Electric ConductanceUnit: mS
Note: Value should be greater than 0.
Transition Frequency
The Transition Frequency associated with the transition (1 to 2 or 2 to 1) between two different vibrational levels.
Symbol: ftr
Measurement: FrequencyUnit: Hz
Note: Value should be greater than 0.
Gate to Source Capacitance
Gate to Source Capacitance is defined as the capacitance that is observed between the gate and Source of the Junction of MOSFET.
Symbol: Cgs
Measurement: CapacitanceUnit: μF
Note: Value should be greater than 0.

Other Formulas to find Transconductance

​Go Transconductance of CC-CB Amplifier
gm=2Av(RtRt+Rsig)RL

Other formulas in Response of Source and Emitter Follower category

​Go 3-DB Frequency in Design Insight and Trade-Off
f3dB=12π(Ct+Cgd)(11RL+1Rout)
​Go Amplifier Gain given Function of Complex Frequency Variable
Am=AmidK
​Go Drain Resistance in Cascode Amplifier
Rd=11Rin+1Rt
​Go Gain Bandwidth Product
GB=gmRL2πRL(Ct+Cgd)

How to Evaluate Transconductance of Source-Follower?

Transconductance of Source-Follower evaluator uses Transconductance = Transition Frequency*Gate to Source Capacitance to evaluate 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 gm symbol.

How to evaluate Transconductance of Source-Follower using this online evaluator? To use this online evaluator for Transconductance of Source-Follower, enter Transition Frequency (ftr) & Gate to Source Capacitance (Cgs) and hit the calculate button.

FAQs on Transconductance of Source-Follower

What is the formula to find Transconductance of Source-Follower?
The formula of Transconductance of Source-Follower is expressed as Transconductance = Transition Frequency*Gate to Source Capacitance. Here is an example- 4799.6 = 1846*2.6E-06.
How to calculate Transconductance of Source-Follower?
With Transition Frequency (ftr) & Gate to Source Capacitance (Cgs) we can find Transconductance of Source-Follower using the formula - Transconductance = Transition Frequency*Gate to Source Capacitance.
What are the other ways to Calculate Transconductance?
Here are the different ways to Calculate Transconductance-
  • Transconductance=(2*Voltage Gain)/((Resistance/(Resistance+Signal Resistance))*Load Resistance)OpenImg
Can the Transconductance of Source-Follower be negative?
No, the Transconductance of Source-Follower, measured in Electric Conductance cannot be negative.
Which unit is used to measure Transconductance of Source-Follower?
Transconductance of Source-Follower is usually measured using the Millisiemens[mS] for Electric Conductance. Siemens[mS], Megasiemens[mS], Mho[mS] are the few other units in which Transconductance of Source-Follower can be measured.
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