Power stage with increased output dynamics

Details Power stage with increased output dynamics Power stage with increased output dynamics

1988-11-28

1990-04-10

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330260, H03F 345

Patent

active

049164082

ABSTRACT:
An improved power stage with increased output dynamics. The stage comprises a power amplifier having a first inverting input, a second non-inverting input, an output to be connected to a load and a feedback network comprising a first resistor connected between the inverting input and the output of the power amplifier and a second resistor connected between the first inverting input and a first line set to a first reference voltage by means of a voltage generator with preset values. The stage furthermore comprises an input voltage generator generating an input voltage signal to be amplified and connected between the second non-inverting input and a second line set to a second reference voltage different from said first reference voltage. In order to increase the output dynamics, in particular in the case of low power supply voltage, said voltage generator arranged between the second resistor and said input voltage generator, and generating a voltage which is variable in inverse proportion to the input voltage signal, with respect to the second reference voltage.

REFERENCES:
patent: 4401950 (1983-08-01), Davis

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