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TWI268411B - USB interface of self-adjusting oscillator with capable of constructing a non-quartz self-adjusting synchronous oscillator - Google Patents

USB interface of self-adjusting oscillator with capable of constructing a non-quartz self-adjusting synchronous oscillator

Info

Publication number
TWI268411B
TWI268411B TW091109414A TW91109414A TWI268411B TW I268411 B TWI268411 B TW I268411B TW 091109414 A TW091109414 A TW 091109414A TW 91109414 A TW91109414 A TW 91109414A TW I268411 B TWI268411 B TW I268411B
Authority
TW
Taiwan
Prior art keywords
oscillator
self
adjusting
synchronous
usb
Prior art date
Application number
TW091109414A
Other languages
Chinese (zh)
Inventor
Pei-Sung Chung
Ming-Te Taeng
Kuan-Chia Huang
Original Assignee
Alcor Micro Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alcor Micro Corp filed Critical Alcor Micro Corp
Priority to TW091109414A priority Critical patent/TWI268411B/en
Application granted granted Critical
Publication of TWI268411B publication Critical patent/TWI268411B/en

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  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

The present invention relates to a USB interface of a self-adjusting oscillator, comprising at least one voltage controlled oscillator (VCO) to provide a USB synchronous frequency needed by a device connected to the USB interface; at least one adjustment unit for computing a feedback frequency to capture a synchronous signal of the USB interface and receive feedback of the USB synchronous frequency generated by the voltage controlled oscillator. The adjustment unit also computes a ratio of the feedback of the USB synchronous frequency to the captured synchronous signal so as to determine whether the synchronous frequency of the voltage controlled oscillator is too fast or too slow, then to deliver a frequency adjustment signal to the voltage controlled oscillator to properly adjust the output USB synchronous frequency of the voltage controlled oscillator, thereby constructing a non-quartz self-adjusting synchronous oscillator.
TW091109414A 2002-05-07 2002-05-07 USB interface of self-adjusting oscillator with capable of constructing a non-quartz self-adjusting synchronous oscillator TWI268411B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW091109414A TWI268411B (en) 2002-05-07 2002-05-07 USB interface of self-adjusting oscillator with capable of constructing a non-quartz self-adjusting synchronous oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW091109414A TWI268411B (en) 2002-05-07 2002-05-07 USB interface of self-adjusting oscillator with capable of constructing a non-quartz self-adjusting synchronous oscillator

Publications (1)

Publication Number Publication Date
TWI268411B true TWI268411B (en) 2006-12-11

Family

ID=60850603

Family Applications (1)

Application Number Title Priority Date Filing Date
TW091109414A TWI268411B (en) 2002-05-07 2002-05-07 USB interface of self-adjusting oscillator with capable of constructing a non-quartz self-adjusting synchronous oscillator

Country Status (1)

Country Link
TW (1) TWI268411B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI410805B (en) * 2008-07-03 2013-10-01 Intel Corp Power optimized dynamic port association
TWI475397B (en) * 2012-09-18 2015-03-01 Algoltek Inc Usb3.0 clock frequency generation device without crystal oscillator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI410805B (en) * 2008-07-03 2013-10-01 Intel Corp Power optimized dynamic port association
TWI475397B (en) * 2012-09-18 2015-03-01 Algoltek Inc Usb3.0 clock frequency generation device without crystal oscillator

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees