Communication demodulation in wireless charging system

US11336117B2 · kind B2 · utility

Assignee

• AIRA, INC. · US

Inventors

• William Paul Abajian · Napa, US
• Jules Marie Xavier Laffitte · San Mateo, US
• John MacDonald · San Francisco, US
• Lixin Shi · Hangzhou City, CN
• Jake Lee Vander Ploeg · San Francisco, US
• Xiaoping Zhu · 余新镇, CN

Key dates

• Filing date: Jan 30, 2020
• Grant date: May 17, 2022
• Expiry date: Jul 16, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B5/79
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A wireless charging system is configured to charge one or more receiver devices simultaneously. The wireless charging system includes multiple coils that may be driven independently based on a feedback system with one or more feedback channels. One of the feedback channels may be demodulated communication signals from the one or more receiver devices. The demodulation may be performed by a communication demodulation circuit with configurable gain. The demodulated communication signals are processed for error correction at a bit level and a packet level, which improves accuracy despite presence of multiple receiver devices and noisy conditions.