Small Signal in BJT Formulas

Small signal is an AC signal (more technically, a signal having zero average value) superimposed on a bias signal (or superimposed on a DC constant signal). And is denoted by V_ss. Small Signal is usually measured using the Volt for Electric Potential. Note that the value of Small Signal is always negative.

Formulas to find Small Signal in BJT

fxSmall-Signal Input Resistance given Emitter CurrentGo

fxSmall Signal Input Voltage given TransconductanceGo

BJT formulas that make use of Small Signal

fxEmitter Resistance of BJTGo

fxTotal Instantaneous Gate-to-Source VoltageGo

List of variables in BJT formulas

fx Signal Current Go

fx Emitter Resistance Go

fx Input Voltage Go

fx Transconductance Go

fx Resistance Go

FAQ

What is the Small Signal?

Small signal is an AC signal (more technically, a signal having zero average value) superimposed on a bias signal (or superimposed on a DC constant signal). Small Signal is usually measured using the Volt for Electric Potential. Note that the value of Small Signal is always negative.

Can the Small Signal be negative?

Yes, the Small Signal, measured in Electric Potential can be negative.

What unit is used to measure Small Signal?

Small Signal is usually measured using the Volt[V] for Electric Potential. Millivolt[V], Microvolt[V], Nanovolt[V] are the few other units in which Small Signal can be measured.

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