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US 2025/0158419 A1Published application
Case to Earbud Communication Without Interrupting Charging
AssigneeQUALCOMM Incorporated
InventorsShamim AHMED, Christian CAMPORESE
Life of this patent
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Abstract
An electronic device includes an input terminal and a data receiver coupled to the input terminal. The electronic device also includes a battery coupled to the input terminal. The data receiver includes a high-pass filter coupled between the input terminal and an input to a comparator that produces a digital received signal while a modulated charging voltage drives the input terminal.
Claims29
An electronic device, comprising:
- an input terminal for receiving a charging voltage;
- a first voltage divider configured to divide a power supply voltage into a divided voltage at a first node;
- a second voltage divider configured to divide the power supply voltage into the divided voltage at a second node;
- a high-pass filter including a high-pass filter capacitor coupled between the input terminal and the first node;
- and
- a comparator configured to compare a voltage of the first node to a voltage of the second node to form a digital received signal.
3 more elements
A method of receiving data from a charging voltage to an electronic device, comprising:
- high-pass filtering a modulated charging voltage to form a high-pass filtered voltage;
- combining the high-pass filtered voltage with a common-mode voltage to form a combined voltage;
- and
- comparing the combined voltage to the common-mode voltage to form a digital received signal while using the modulated charging voltage to charge a battery in the electronic device.
1 more element
An earbud, comprising:
- an input terminal;
- a charging rail for a charging voltage;
- an input switch coupled between the input terminal and the charging rail;
- and
- a data receiver coupled to the input terminal, wherein the data receiver includes a comparator and a high-pass filter coupled between the input terminal and a first input of the comparator.
2 more elements
Dependencies are inferred from the claim text.