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Small Signal Input Resistance in Transistor Amplifiers Formulas

Small signal input resistance 2 between Base and emitter models how the input impedance between the base and emitter terminals of the transistor changes when a small AC signal is applied. And is denoted by Rsm. Small Signal Input Resistance is usually measured using the Kilohm for Electric Resistance. Note that the value of Small Signal Input Resistance is always positive.

Transistor Amplifiers formulas that make use of Small Signal Input Resistance

fxInput Impedance of Common-Base Amplifier​Go
fxInput Resistance of Common Emitter Amplifier​Go
fxInput Resistance of Common Emitter Amplifier given Small-Signal Input Resistance​Go
fxOutput Resistance of Emitter-Degenerated CE Amplifier​Go
fxOpen Circuit Bipolar Cascode Voltage Gain​Go

FAQ

What is the Small Signal Input Resistance?
Small signal input resistance 2 between Base and emitter models how the input impedance between the base and emitter terminals of the transistor changes when a small AC signal is applied. Small Signal Input Resistance is usually measured using the Kilohm for Electric Resistance. Note that the value of Small Signal Input Resistance is always positive.
Can the Small Signal Input Resistance be negative?
No, the Small Signal Input Resistance, measured in Electric Resistance cannot be negative.
What unit is used to measure Small Signal Input Resistance?
Small Signal Input Resistance is usually measured using the Kilohm[kΩ] for Electric Resistance. Ohm[kΩ], Megohm[kΩ], Microhm[kΩ] are the few other units in which Small Signal Input Resistance can be measured.
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