Amplifier improvements for limiting clipping

Details Amplifier improvements for limiting clipping Amplifier improvements for limiting clipping

1976-10-15

1977-09-13

Mullins, James B.

Amplifiers

With amplifier condition indicating or testing means

330 28, 330 29, 330 59, 330136, 330139, 330144, 330149, H03G 330

Patent

active

040485730

ABSTRACT:
A differential amplifier is connected to an amplifier for comparing an amplifier input signal with the signal fed back by the amplifier feedback circuit. The output of the differential amplifier is coupled to a full wave rectifier the output of which controls an attenuator connected between a source of electrical input signals and the amplifier. When the amplifier is operating in its linear range, the differential amplifier inputs are identical and it does not produce an output. Under this condition, the input signal is not attenuated. However, in the presence of amplifier clipping, the differential amplifier produces an output which, after full wave rectification, operates to increase the attenuation, and thus reduce the amplitude of the signal applied to the amplifier; clipping is limited.

REFERENCES:
patent: 3699468 (1972-10-01), Harmgarot

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