The Differential amplifier circuit

Published:2011/6/15 1:44:00 Author:Christina | Keyword: Differential, amplifier | From:SeekIC

The basic form requirements of the circuit: The parameters of the two circuits are completely symmetry. Also the temperature features of the two tubes are completely symmetry. Working principle: when you input the signal Ui=0, the two tubes have the same current, also the collector electrode potential, so the output voltage Uo=UC1-UC2=0. When the temperature is increasing, the currents of the two tubes increase too, and the collector electrode potentials reduce, because they are in the same temperature environment, so the two tube have the same variation values of current and voltage, the output voltage is still zero.



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