Differential amplifier input impedance

L.P. Dennis

doi:10.1109/proc.1970.7909

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Differential amplifier input impedance

L.P. Dennis

Year: 1970 Journal: Proceedings of the IEEE Vol: 58 (8)Pages: 1288-1289 Publisher: Institute of Electrical and Electronics Engineers

DOI: 10.1109/proc.1970.7909

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Abstract

The analysis of a simple differential amplifier excited by two separate voltage sources reveals that the input impedance which loads the voltage source at the inverting input is not a constant but rather is a function of the characteristics of each voltage source. An expression is derived for the input impedance and the result is illustrated in a simple example.

Keywords:

Voltage source Electrical impedance Output impedance Operational amplifier Input offset voltage Input impedance Direct-coupled amplifier Voltage Amplifier Physics Control theory (sociology) Computer science Electronic engineering Electrical engineering Engineering

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Differential amplifier input impedance

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