公开(公告)号：US11804711B2

公开(公告)日：2023-10-31

申请号：US17567947

申请日：2022-01-04

Applicant: Stripe, Inc.

Inventor： Wing Cheong Chan ,  Hwai Sian Tsai ,  Chi Wah Lo

IPC: H02J1/10 ,  G07F7/08 ,  H02J7/00

CPC classification number: H02J1/102 ,  G07F7/0873 ,  H02J7/0068

Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.