Panasonic Automotive Systems Company of America, Division of Panasonic Corporation of North America

Panasonic Automotive Systems Company of America

Jerry Alan Rathje

Richard Dennis Fay

Larry Vincent Craig

Mike T Burk

Daisuke Iino

An AC capable power amplifier arrangement is realized that includes a buck converter with a power inductor, two buck switches, and alternately a buck-boost converter using four switches, each driving an output polarity steering set of four switches. The polarity steering switches convey the converter output current to output terminals that connect to a load with a capacitor connected in parallel. A differential receiver is connected to the output terminals to provide negative feedback. A mixer receives an input voltage signal, an output of the differential receiver, and output from a triangle wave generator. A set of two comparators for buck amplifier conversion, or four comparators for buck-boost amplifier conversion, each receives an output of the mixer. Each of the comparators produces a respective output for driving the converter switches through simple steering logic interfaces between the comparators, the converter components and a polarity steering output stage.

Switching audio amplifier

The interface uses a combination of controls. Mode independent controls retain essentially the same function throughout all modes and features and mode dependent controls vary based on the active mode or feature. The arrangement of the mode controls, the soft controls and the display is designed to facilitate the user's interaction with the system. The system provides some redundant controls so that the user can select the control that is most convenient or intuitive for that user. The interface supports a multizone system having a primary zone and one or more secondary zones. Information for the active mode of the active zone is provided via the display.

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Peachtree City, GA, United States of America

Jerry Alan Rathje