Circuit for automatically regulating the gain of a differential

Details Circuit for automatically regulating the gain of a differential Circuit for automatically regulating the gain of a differential

1996-09-13

1998-09-08

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330138, 330280, 360 46, H03G 330

Patent

active

058050221

ABSTRACT:
A circuit having a double half-wave rectifier connected to the outputs of a differential amplifier in order to produce two quantities dependent on the amplitudes of the half-waves of the output signal of the amplifier. Two comparators each having an input are connected to an output of the rectifier and a reference input in order to produce respective output signals when the amplitudes of the respective half-waves are greater than the levels applied to the reference inputs. The circuit also has processing means for generating a signal for regulating the gain of the amplifier in dependence on the durations of the output signals of the two comparators. The circuit may advantageously be used when the signal to be amplified is not symmetrical.

REFERENCES:
patent: 5521771 (1996-05-01), Keithley et al.

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