Enhanced class SM power amplifier

Details Enhanced class SM power amplifier Enhanced class SM power amplifier

1987-04-08

1988-05-31

Laroche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including class d amplifier

330207A, H03F 3217

Patent

active

047484217

ABSTRACT:
A class SM amplifier is provided having a threshold circuit with a plurality of threshold levels for generating a plurality of threshold signals. In response to an input signal passing a particular threshold level, the threshold circuit generates as an output a particular threshold signal. A voltage supply is provided having a plurality of voltage levels. The class SM amplifier includes a plurality of transistors coupled to a power combiner and the threshold circuit, and the plurality of voltage levels from the voltage supply. The transistors switch voltage levels across the power combiner in response to a particular threshold signal from the threshold circuit. The power combiner is coupled to a load, and outputs the combination of the voltages from the transistors across the load. The plurality of voltage levels are adjusted to approximate the input signal.

REFERENCES:
patent: 4554512 (1985-11-01), Aiello
patent: 4594560 (1986-06-01), Dingwall et al.

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