Efficient, switched linear signal driver

Amplifiers – With semiconductor amplifying device – Including class d amplifier

Reexamination Certificate

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C330S20700P

Reexamination Certificate

active

06937095

ABSTRACT:
The invention provides a switched linear amplifier for amplifying an input signal for provision to a communication medium. The switched linear amplifier includes a linear amplifier, an output current detector, and a switched inductive circuit. The linear amplifier amplifies the input signal to produce a linearly amplified signal. The output current detector is operative to detect an output current level having a magnitude greater than a predetermined threshold and provide a control signal. The switched inductive circuit is responsive to the control signal from the output current detector to provide an output current via a switched (and ideally lossless) inductive path, to provide a highly efficient means of generating a linearly amplified signal for provision to the communication medium.

REFERENCES:
patent: 3636380 (1972-01-01), Anderson
patent: 5438694 (1995-08-01), Muri et al.
patent: 5847610 (1998-12-01), Fujita

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