CIRCUIT ARRANGEMENT COMPRISING A DIFFERENTIAL AMPLIFIER

摘要

. Circuit arrangement comprising a differential amplifier. A circuit arrangement comprising a differential amplifier, which supplies a balanced alternating voltage having a d.c. component which is filtered by means of a low-pass filter and is used for negative feedback. In order to economize a second filter capacitor, the voltages are supplied through a low-pass circuit to a second differential amplifier, which supplies an unbalanced d.c. control quantity, which is supplied through a further low-pass filter comprising only one capacitor to the first differential amplifier.