Differential amplifier circuit having improved control signal fi

Details Differential amplifier circuit having improved control signal fi Differential amplifier circuit having improved control signal fi

1982-11-04

1985-04-16

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330261, H03F 345

Patent

active

045118531

ABSTRACT:
A circuit arrangement includes 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 avoid the use of 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 signal, which is supplied through a further low-pass filter having only one capacitor to the first differential amplifier.

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