Common Mode Gain in BJT Formulas

Common Mode Gain is typically much smaller than the differential gain. Acm is the gain given to a voltage that appears on both input terminals with respect to the ground. And is denoted by A_cm. Common Mode Gain is usually measured using the Decibel for Noise. Note that the value of Common Mode Gain is always negative.

Formulas to find Common Mode Gain in BJT

fxCommon Mode Gain of BJTGo

BJT formulas that make use of Common Mode Gain

fxCommon Mode Rejection RatioGo

List of variables in BJT formulas

fx Collector Resistance Go

fx Output Resistance Go

fx Change in Collector Resistance Go

FAQ

What is the Common Mode Gain?

Common Mode Gain is typically much smaller than the differential gain. Acm is the gain given to a voltage that appears on both input terminals with respect to the ground. Common Mode Gain is usually measured using the Decibel for Noise. Note that the value of Common Mode Gain is always negative.

Can the Common Mode Gain be negative?

Yes, the Common Mode Gain, measured in Noise can be negative.

What unit is used to measure Common Mode Gain?

Common Mode Gain is usually measured using the Decibel[dB] for Noise. Neper[dB], MilliDecibel[dB] are the few other units in which Common Mode Gain can be measured.

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