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Analog Electronics
Transconductance in BJT Formulas
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. And is denoted by G
m
. Transconductance is usually measured using the Millisiemens for Electric Conductance. Note that the value of Transconductance is always negative.
Formulas to find Transconductance in BJT
f
x
Transconductance using Collector Current
Go
f
x
Short-Circuit Transconductance
Go
f
x
Transconductance of BJT at Intrinsic Gain
Go
BJT formulas that make use of Transconductance
f
x
Drain Current given Device Parameter
Go
f
x
Small-Signal Diffusion Capacitance
Go
f
x
Unity-Gain Bandwidth of BJT
Go
f
x
Transition Frequency of BJT
Go
f
x
Common Mode Rejection Ratio of BJT
Go
f
x
Voltage Gain given Transconductance and Collector Resistance
Go
f
x
Overall Voltage Gain given Load Resistance of BJT
Go
f
x
Small-Signal Input Resistance between Base and Emitter using Transconductance
Go
f
x
Input Resistance of Common Gate Circuit given Transconductance
Go
f
x
Output Resistance of CS Amplifier when GMRO is Greater than 1
Go
f
x
Single Component of Drain Voltage given Transconductance
Go
f
x
Voltage between Gate and Source
Go
f
x
Output Voltage given Transconductance
Go
f
x
Small Signal Input Voltage given Transconductance
Go
f
x
Body Transconductance
Go
List of variables in BJT formulas
f
x
Collector Current
Go
f
x
Threshold Voltage
Go
f
x
Output Current
Go
f
x
Input Voltage
Go
f
x
Drain Current
Go
f
x
Gate to Source Voltage
Go
FAQ
What is the 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. Transconductance is usually measured using the Millisiemens for Electric Conductance. Note that the value of Transconductance is always negative.
Can the Transconductance be negative?
Yes, the Transconductance, measured in Electric Conductance can be negative.
What unit is used to measure Transconductance?
Transconductance is usually measured using the Millisiemens[mS] for Electric Conductance. Siemens[mS], Megasiemens[mS], Mho[mS] are the few other units in which Transconductance can be measured.
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