Frequency calibration method applicable in universal serial bus device and related universal serial bus device
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United States of America Patent
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Feb 27, 2018
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app pub date -
Nov 27, 2014
filing date -
Nov 28, 2013
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Abstract
A frequency calibration method applied to a Universal Serial Bus (USB) device includes: coupling the USB device to a USB host, wherein the USB device at least comprises a programmable oscillator; utilizing the USB device to extract a low frequency periodic signal from the USB host; and calibrating the programmable oscillator of the USB device according to the low frequency periodic signal, to make the programmable oscillator generate an oscillating signal having a predetermined frequency.
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