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 oscillatorInfo
- 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
Links
Landscapes
- 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.
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)
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 |
-
2002
- 2002-05-07 TW TW091109414A patent/TWI268411B/en not_active IP Right Cessation
Cited By (2)
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2006001952A3 (en) | Low power and low timing jitter phase-lock loop and method | |
TW200625821A (en) | Oscillator circuit and semiconductor device having oscillator circuit | |
TR200102834T2 (en) | Method and device for reducing oscillator noise with noise-forward-feed management. | |
WO2009057289A1 (en) | Spectrum spread clock generation device | |
HK1068998A1 (en) | Control system with capacitive detector | |
MY152626A (en) | Apparatus and methods for frequency control in a multi-output frequency synthesizer | |
TW200705145A (en) | Charge pump control circuit and control method | |
TW200515130A (en) | Electric saving circuitry and method of an electronic device | |
GB0906418D0 (en) | Digital phase-locked loop architecture | |
TW200715700A (en) | Calibration circuit and operation method for voltage-controlled oscillator | |
AU7472500A (en) | Apparatus for doppler correction in a wireless communications system | |
AU2003230160A1 (en) | Phase-locked loop. | |
TW200620840A (en) | Clock generation circuit, and communication device | |
DE60302440D1 (en) | VIBRATION LIVE LOOP LOOP | |
MY127135A (en) | Mains frequency synchronous burst mode power supply | |
TW200718022A (en) | Offsetcontrollable spread spectrum clock generator apparatus | |
MX155327A (en) | TIME BASED IMPROVEMENTS SYNCHRONIZED TO AN EXTERNAL CLOCK FOR NUMERIC AUTO-SWITCHES | |
TWI268411B (en) | USB interface of self-adjusting oscillator with capable of constructing a non-quartz self-adjusting synchronous oscillator | |
AU2003224367A1 (en) | Pll circuit | |
TW200640145A (en) | System and method for optimizing phase locked loop damping coefficient | |
TW200712827A (en) | Circuit of dynamically adjusting the basic clock signal for the front-side bus and its method | |
TWI268410B (en) | Circuit and method for generating a clock signal | |
AU7566901A (en) | Linear dead-band-free digital phase detection | |
AU2003228303A1 (en) | Phase-locked loop control of passively q-switched lasers | |
TW200705814A (en) | Phase lock loop, method and apparatus for fixed output frequency of phase lock loop thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Annulment or lapse of patent due to non-payment of fees |