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:
Aug. 18, 2020
Filed:
Sep. 03, 2019
Efficient Power Conversion Corporation, El Segundo, CA (US);
Edward Lee, Fullerton, CA (US);
Ravi Ananth, Laguna Niguel, CA (US);
Michael Chapman, Long Beach, CA (US);
John S. Glaser, Niskayuna, NY (US);
Stephen L. Colino, Bear, DE (US);
Efficient Power Conversion Corporation, El Segundo, CA (US);
Abstract
A circuit for providing an adjustable output driver current for use in LiDAR or other similar GaN driver applications. The circuit creates an appropriate gate-to-source voltage, V, for a high-current GaN driver FET to obtain a desired, high slew-rate driver current, I. An externally provided reference current is used to create the required Vfor the driver FET, which is stored on an external capacitor. The value of the capacitor far exceeds the relatively low input-capacitance of the GaN driver FET. When a pulse Iof desired value is needed, the voltage on the capacitor is impinged upon the gate of the driver FET, thereby creating the desired I. The reference charging circuit replenishes any charge lost on the capacitor, so that the same desired Ican be obtained on the next command pulse.