A low‐phase‐noise and low‐power CMOS colpitts VCO using Gm boosting and capacitance switching techniques. Issue 1 (30th July 2020)

• Record Type: Journal Article
• Authors: Pakasiri, Chatrpol; You, Jia‐Hao; Wang, Sen
• Is Part Of: Microwave and optical technology letters. Volume 63:Issue 1(2021)
• Page Start: 46
• Page End: 50
• Publication Date: 2020-07-30
• Subjects: CMOS -- Gm‐boosting topology -- low‐phase‐noise -- low‐power -- switched capacitor array -- voltage‐controlled oscillator (VCO); Microwaves -- Periodicals; Optics -- Periodicals; 621
• DOI: 10.1002/mop.32550
• Languages: English
• ISSNs: 0895-2477

Abstract

Abstract: This letter presents a low‐power and low‐phase‐noise 5‐GHz VCO fabricated in a standard CMOS 0.18‐μm process. The low power dissipation was achieved by using the PMOS cross‐coupled pair and G m ‐boosting topology, and the low phase noise was obtained by adding two pairs of switched capacitor array. The VCO consumed a dc power of 2.92 mW with the supply voltage of 1 V. The measured phase noises were − 104.6 dBc/Hz and − 117.4 dBc/Hz at 1 MHz offset frequency with switched off and on capacitances, respectively, which demonstrated 12.8‐dB improvement.