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US Patent 10090771 Switching mode power amplifier with load isolation

Patent 10090771 was granted and assigned to Sparton (company) on October, 2018 by the United States Patent and Trademark Office.

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Patent
Patent

Patent attributes

Patent Applicant
Sparton (company)
Sparton (company)
Current Assignee
Sparton (company)
Sparton (company)
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
10090771
Date of Patent
October 2, 2018
Patent Application Number
15220705
Date Filed
July 27, 2016
Patent Primary Examiner
‌
Dinh T Le
Patent abstract

A power amplifier device includes first and second pairs of semiconductor switches, transformers, and a zero-crossing detection circuit for detecting a zero voltage crossing of an analog input signal. The switches of the first pair receive a respective positive and negative component of the input signal. The transformers store energy from the positive and negative components, respectively. Each transformer releases accumulated energy when the respective switch of the first pair turns off The switches of the second pair have opposite switching states and are connected between a respective transformer and a load, e.g., a transducer, speak, or motor. Each switch receives released energy from the respective transformer. A switching state of each switch of the second pair changes in response to a detected zero voltage crossing of the input signal to transfer the released energy to the load. A system includes the device and the load.

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