TW200644434A - Unified dual-mode GSM/UMTS clock - Google Patents
Unified dual-mode GSM/UMTS clockInfo
- Publication number
- TW200644434A TW200644434A TW095117370A TW95117370A TW200644434A TW 200644434 A TW200644434 A TW 200644434A TW 095117370 A TW095117370 A TW 095117370A TW 95117370 A TW95117370 A TW 95117370A TW 200644434 A TW200644434 A TW 200644434A
- Authority
- TW
- Taiwan
- Prior art keywords
- clock signal
- umts
- gsm
- signal
- frequency
- Prior art date
Links
Abstract
A unified dual-mode global system for mobile communication (GSM)/universal mobile telecommunication systems (UMTS) clock and a transceiver employing the unified GSM/UMTS clock are disclosed. A reference clock generates a reference clock signal and a local oscillator (LO) generates a LO signal based on the reference clock signal. A frequency divider selectively generates either a GSM clock signal or a UMTS clock signal by converting a frequency of the LO signal by a predetermined factor. Both the GSM clock signal and the UMTS clock signal are generated based on the common reference clock signal. The reference clock signal frequency may be a GSM fundamental frequency or a UMTS fundamental frequency. An interpolator and/or a decimator may be used for matching frequencies of UMTS baseband signal and the UMTS clock signal or frequencies of GSM baseband signal and the GSM clock signal.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US68171205P | 2005-05-17 | 2005-05-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
TW200644434A true TW200644434A (en) | 2006-12-16 |
TWI353116B TWI353116B (en) | 2011-11-21 |
Family
ID=44870439
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW095145499A TW200737731A (en) | 2005-05-17 | 2006-05-16 | Unified dual-mode GSM/UMTS clock |
TW98117358A TWI394375B (en) | 2005-05-17 | 2006-05-16 | Unified dual-mode gsm/umts clock |
TW95117370A TWI353116B (en) | 2005-05-17 | 2006-05-16 | Unified dual-mode gsm/umts clock |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW095145499A TW200737731A (en) | 2005-05-17 | 2006-05-16 | Unified dual-mode GSM/UMTS clock |
TW98117358A TWI394375B (en) | 2005-05-17 | 2006-05-16 | Unified dual-mode gsm/umts clock |
Country Status (1)
Country | Link |
---|---|
TW (3) | TW200737731A (en) |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001345731A (en) * | 2000-06-06 | 2001-12-14 | Matsushita Electric Ind Co Ltd | Multi-mode portable telephone terminal |
-
2006
- 2006-05-16 TW TW095145499A patent/TW200737731A/en unknown
- 2006-05-16 TW TW98117358A patent/TWI394375B/en not_active IP Right Cessation
- 2006-05-16 TW TW95117370A patent/TWI353116B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
TWI394375B (en) | 2013-04-21 |
TW200947874A (en) | 2009-11-16 |
TWI353116B (en) | 2011-11-21 |
TW200737731A (en) | 2007-10-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Annulment or lapse of patent due to non-payment of fees |