Switched mode power amplifier

Abstract

A digital switched-mode power amplifier including a dc power source (1) and two dc-to-dc converters arranged in a parallel configuration and arranged to operate in a switched-mode operation is disclosed. Each converter comprises a primary side (2a, 2b) with first switching means and a secondary side (5a, 5b) with second switching means. The primary sides (2a, 2b) are connected to said dc power source (1) and the secondary sides (5a, 5b) are connected to opposite ends of a load (6). Furthermore, each converter is provided with a transformer to obtain dc-isolation between said primary side (2a, 2b) and said secondary side (5a, 5b). The transformer comprises a primary winding (3a, 3b) arranged at the primary side (2a, 2b) and a secondary winding (4a, 4b) arranged on the secondary side (5a, 5b). Moreover, control means (7) comprising primary (10) and secondary control means (12) are arranged to operate the dc-to-dc converters in a complementary manner and to use power control to affect the switching cycle of each converter.

Dependencies are inferred from the claim text.