A novel technique to reduce the supply sensitivity of CMOS ring oscillators
2014 (English)Manuscript (preprint) (Other academic)
A technique to abbreviate the supply sensitivity of CMOS ring oscillators is presented. By switching the power source from the noisy power supply to a battery during sensitive zero crossings the noise performance of the ring oscillator is improved. The proposed technique can be used in conjunction with other regulation techniques to enhance the performance of ring oscillators in phase locked loops. The proposed switching circuit using a pseudo differential ring oscillator are designed in a 65 nm CMOS process to demonstrate the viability of the proposed scheme in deep submicron process with reduced voltage headroom. At 2 GHz the outputclock exhibits a jitter of less than 14 ps while subjected to a 500 mV noise tone at 500 MHz.
Place, publisher, year, edition, pages
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:liu:diva-113280OAI: oai:DiVA.org:liu-113280DiVA: diva2:780468