Switched mode power amplifier

Details Switched mode power amplifier Switched mode power amplifier

2006-04-18

2006-04-18

Mottola, Steven J. (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including class d amplifier

Reexamination Certificate

active

07030694

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.

REFERENCES:
patent: 4186437 (1980-01-01), Cuk
patent: 5027264 (1991-06-01), DeDoncker et al.
patent: E00386933 (1990-09-01), None

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