کنفرانس بین المللی میکروالکترونیک ایران

صفحه اصلی / ششمین کنفرانس بین المللی میکروالکترونیک ایران

A differential ring VCO with a new structure for the pre-charger and pre-discharger method

نویسندگان :

Vahid Khodadadi Viaee¹ Mahdi Alijani² Adib Abrishamifar³

1- دانشگاه علم و صنعت ایران 2- دانشگاه علم و صنعت ایران 3- دانشگاه علم و صنعت ایران

کلمات کلیدی :

ring VCO،tuning range،phase noise

چکیده :

This paper proposes a high-performance, low-power, and wide-band Ring Voltage Controlled Oscillator (RVCO) with a differential topology. Utilizing a dual-delay path method alongside a novel structure as a pre-charger and pre-discharger circuit has successfully improved the efficiency parameters of the proposed VCO. Also, employing composite load at the output node which shows an inductive impedance, leads to an increment of frequency bandwidth. The introduced circuit is designed and simulated in a standard 180nm CMOS process under the power supply of 1.8V. The oscillation frequency in the proposed circuit can be tuned from 853MHz to 3.178GHz with a variation of control voltage from 0.7V to 1.8V, leading to a tuning range of 115.35%. This structure achieves a phase noise of -87.02 dBc/Hz at 1MHz frequency offset from the carrier. Also, the presented VCO dissipates an average power of 1.495mw. The figure of Merit (FoM) of this VCO is calculated at -152.09 dBc/Hz and it occupies an area of 26.13µm×50.9µm