In this work, a 7.92 GHz ultra-low-voltage LC-tank voltage controlled oscillator (VCO) is introduced. The proposed LC-tank VCO adopts a NMOS cross-coupled topology and additional parallel capacitors for low voltage operation and phase noise reduction. The measured phase noise at 600 KHz frequency offset is -98 dBc/Hz and at 1 MHz offset is -108 dBc/Hz, respectively. The proposed VCO achieves a figure-of-merit (FOM) value of -187 dBc/Hz, drawing 0.87 mW from a 0.62V supply. The proposed circuit topology is designed for ultra wide-band (UWB) applications and implemented in TSMC 0.18 \mu M CMOS technology.
|Title of host publication||PROCEEDINGS OF PROGRESS IN ELECTROMAGNETICS RESEARCH SYMPOSIUM (PIERS 2012)|
|Number of pages||5|
|State||Published - 27 Mar 2012|
|Name||Progress in Electromagnetics Research Symposium|
Lin, C-Y., Rao, P. Z., Chiu, H-H., & Chung, S-J. (2012). An Ultra-low-voltage CMOS VCO Using Parallel Capacitor for Phase Noise Reduction. In PROCEEDINGS OF PROGRESS IN ELECTROMAGNETICS RESEARCH SYMPOSIUM (PIERS 2012) (pp. 1256-1260). (Progress in Electromagnetics Research Symposium). Electromagnetics Academy.