The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 26, 2013
Filed:
Sep. 24, 2010
Tsung-yin Chiang, Chiayi County, TW;
Chun-chi Wang, Nantou County, TW;
Po-hao Wu, Hsinchu County, TW;
Chun-an Tang, Hsinchu County, TW;
Tsung-Yin Chiang, Chiayi County, TW;
Chun-Chi Wang, Nantou County, TW;
Po-Hao Wu, Hsinchu County, TW;
Chun-An Tang, Hsinchu County, TW;
Elan Microelectronics Corporation, Hsinchu, TW;
Abstract
A circuit and method for trimming an internal oscillator of a USB device that generates a clock signal as a frequency source of the USB device detect an end of packet from an input data stream to initialize a counter, identify a token packet in the data stream to detect a start of frame token packet for the counter to carry out clock counting on the clock signal to thereby obtain a count value, and compare the count value with a reference value to determine a trimming code for trimming a clock frequency of the internal oscillator.