The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 30, 2021
Filed:
Mar. 11, 2020
Hunter Wu, Santa Clara County, CA (US);
Hamza W. Derbas, Menlo Park, CA (US);
Paul Firehammer, Saline, MI (US);
Robert J. Kromer, San Francisco, CA (US);
Hunter Wu, Santa Clara County, CA (US);
Hamza W. Derbas, Menlo Park, CA (US);
Paul Firehammer, Saline, MI (US);
Robert J. Kromer, San Francisco, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
A high-voltage DC floating system includes a source, a power rail, a power bus, a load, and a pre-charge circuit. The power bus includes a positive bus portion and a negative bus portion. The pre-charge circuit includes a first pre-charge circuit portion that is configured to equalize a voltage across the positive power supply switch between the source and a Y-capacitance of the load and a second pre-charge circuit portion that defines a switched path to ground that is configured to equalize a voltage associated with a Y-capacitance of the negative power rail.