WIRELESS COMMUNICATION CIRCUIT AND TRANSPORT DEVICE FOR SENDING RESCUE MESSAGE
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United States of America Patent
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Issued Date -
May 9, 2024
app pub date -
Oct 16, 2023
filing date -
Nov 9, 2022
priority date (Note) -
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Abstract
A wireless communication circuit and a transport device for sending rescue message are provided. The wireless communication circuit is arranged in a transport device for sending a rescue message to a cellular network and includes a radio transceiver, a signal amplifier circuit, a plurality of filters, and a first switch. The radio transceiver converts a baseband signal to a radio frequency signal and determines whether the cellular network has been connected. The first switch includes an input end and a plurality of output ends, and is electrically connected between the signal amplifier circuit and the plurality of filters. The first switch connects the input end and one of the plurality of output ends in sequence until the radio transceiver determines the cellular network has been connected. The wireless radio transceiver sends the rescue message through the first switch.
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