Wakeup circuit

US12393257B2 · kind B2 · utility

Assignee

• Apple Inc. · US

Inventors

• Talbott M. Houk · Culver City, US
• Wenxun Huang · Redwood City, US
• Nikola Jovanovic · Tegernsee, DE
• Floyd L. Dankert · Austin, US
• Sanjay Pant · Santa Clara, US
• Alessandro Molari · Eichenau, DE
• Siarhei Meliukh · Munich, DE
• Nicola Florio · Bari, IT
• Ludmil Nikolov · Cupertino, US
• Nathan F. Hanagami · San Francisco, US
• Hartmut Sturm · Germering, DE
• Di Zhao · Nanhu, CN
• Chad L. Olson · Bountiful, US
• John J. Sullivan · Delmar, US
• Seyedeh Maryam Mortazavi Zanjani · Austin, US
• Tristan R. Hudson · San Jose, US
• Jay B. Fletcher · Saratoga, US
• Jonathan Alan Dutra · Saratoga, US

Key dates

• Filing date: Mar 16, 2023
• Grant date: Aug 19, 2025
• Expiry date: Mar 16, 2043

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F1/3203
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

The present disclosure describes a system with a power management device, a wakeup circuit, a battery management device, and a connector. During a powered down mode of operation, the battery management device can provide, via the connector, a bias voltage to the wakeup circuit. In response to a wakeup switch being activated, the battery management device can provide a power supply (e.g., from a battery) to the power management device. Benefits of the wakeup circuit include (1) a reduction of battery consumption—and thus improving battery lifetime—when the electronic system is in a powered down mode of operation because the wakeup circuit has lower number of active components compared to other designs and (2) a non-complex wakeup circuit design because one or more existing connector interconnects between the power management device and the battery management device can be re-used during electronic system's powered down mode of operation.