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:
Mar. 12, 2019
Filed:
Apr. 07, 2017
Microsoft Technology Licensing, Llc, Redmond, WA (US);
Mark Champion, Kenmore, WA (US);
Lev Cherkashin, Redmond, WA (US);
Jonathan Alan Dutra, Saratoga, CA (US);
Eric P. Filer, Renton, WA (US);
Microsoft Technology Licensing, LLC, Redmond, WA (US);
Abstract
Techniques for providing an enhanced resonant circuit amplifier are described herein. Using a capacitor to couple the drive to the resonant circuit can be problematic because the current flows the same direction with every energy burst, which causes the coupling capacitor to charge up and stop injecting energy into the resonant circuit. To solve this issue, embodiments disclosed herein add a burst of energy once every half cycle. This reduces distortion in the resonant energy. A second benefit is the ability to 'push in' and 'pull out' energy from the resonant circuit, which can prevent the capacitor from charging up and allow a resonant circuit amplifier to continually produce a symmetric, stable output. In addition, a controller can dynamically modify a number of aspects of an output, e.g., an amplitude and/or a DC bias, by modifying the duty cycle of an input signal.