Microelectron. J. | 2021
Low power CMOS differential ring VCO designs using dual delay stages in 0.13 \u200bμm technology for wireless applications
Abstract
Abstract This manuscript postulates two new designs of dual-delay stage for the four-stage CMOS differential ring voltage controlled oscillators (VCOs). Ring VCOs designs use dual-delay path techniques to achieve a wide tuning range with low power dissipation. The proposed VCOs are designed in TSMC 0.13\xa0\u200bμm CMOS technology with a power supply of 1.3\xa0\u200bV. VCO-1 generates tuning ranges from 5.188 to 7.932\xa0\u200bGHz (41.82%), whereas its power dissipation varies from 1.853 to 2.711\xa0\u200bmW by the change in control voltage from −1.0\xa0\u200bV to 0\xa0\u200bV. VCO-2 based on I-MOS varactors produces a tuning range from 4.918 to 7.268\xa0\u200bGHz (38.56%) and dissipates the power from 1.853\xa0\u200bmW to 2.711\xa0\u200bmW. VCO-1 and VCO-2 exhibits phase-noise of −102.2 dBc/Hz and −99.5 dBc/Hz at 1\xa0\u200bMHz offset from 5.834\xa0\u200bGHz to 5.482\xa0\u200bGHz central frequency, respectively. The figure-of-merit (FoM) of VCO-1 and VCO-2 circuit is −173.9 dBc/Hz and −171.2 dBc/Hz. Proposed VCO-1 and VCO-2 acquire an area of 247.62 μm2 and 248.04 μm2, respectively.