Input Resistance in Feedback Amplifiers Formulas

The Input Resistance is the resistance seen by the current source or voltage source which drives the circuit. And is denoted by R_in. Input Resistance is usually measured using the Kilohm for Electric Resistance. Note that the value of Input Resistance is always positive.

Feedback Amplifiers formulas that make use of Input Resistance

fxInput Resistance with Feedback of Feedback Voltage Amplifier Given Loop GainGo

fxInput Resistance with Feedback of Feedback Transresistance Amplifier (Shunt-Shunt)Go

fxInput Resistance with Feedback of Feedback Transconductance Amplifier (Series-Series)Go

fxInput Resistance with Feedback Current AmplifierGo

FAQ

What is the Input Resistance?

The Input Resistance is the resistance seen by the current source or voltage source which drives the circuit. Input Resistance is usually measured using the Kilohm for Electric Resistance. Note that the value of Input Resistance is always positive.

Can the Input Resistance be negative?

No, the Input Resistance, measured in Electric Resistance cannot be negative.

What unit is used to measure Input Resistance?

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 Input Resistance can be measured.

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