1. 系所:積體電路設計研究所 指導教授:林志明 學生:鄭士豪
A GHz Multi-Band CMOS Frequency Synthesizer for WPAN WLAN Applications Ja-Yol Lee, Kwidong Kim, Jongkee Kwon, Seung-Chul Lee, Jongdae Kim, and Sang-Heung Lee IEEE 2006 Custom Intergrated Circuits Conference (CICC) Page(s):377 – 380 Sept. 2006
系所:積體電路設計研究所
指導教授:林志明
學生:鄭士豪

2. Outline Abstract Introduction Building Block of Multiband PL
Multiband Mutimodulus Divider
Adaptive Multiband LC VCO
Measurement of Conclusion

3. Abstract
a GHz multi-band CMOS frequency synthesizer for WLAN and UWB applications
new multi-mode prescaler and adaptive multi-band LC VCO
six modes of divide-by-2/3, 4/5, 8/9, 16/17, 32/33, and 64/65
the gate width of cross-coupled MOS array is tuned to calibrate oscillation amplitude and alleviate 1/ƒ flicker noise of MOS
-121 dBc/Hz at 5 MHz offset from 5.24 GHz carrier
a total current of 26mA at 1.2 V
0.13-μm CMOS process technology

4. Introduction WLAN (wireless local area networks)
The a working in 5-GHz UNII (unlicensed national information infrastructure) band supplies a bandwidth of 300 MHz and provides twelve nonoverlapping data channels of 20 MHz.
A MIMO (multiple-input multiple-output) integrated system begins to appear in chip market for the purpose of enhancing the present technology.
The unlicensed frequency spectra of GHz has been allocated by FCC (federal communications commission) as UWB (ultra-wideband communication) band.
UWB system must satisfy high-date rates as well as a fast band switching time of nanoseconds.

5. Building Block of Multiband PL

6. Multiband Mutimodulus Divider

8. Adaptive Multiband LC VCO

10. Measurement of Conclusion