Abstract

A differentially controlled monolithic LC-VCO along with a differential charge pump are used to implement a differential PLL for substrate noise immunity. The differential VCO control is achieved with minimal increase in the power consumption and without sacrificing the tuning range. In a 0.5 /spl mu/m CMOS technology the measured VCO phase noise is -11 dBe @1.0 MHz and the tuning range is 26% of the 1.25 GHz center frequency, at a total power consumption of 4.0 mA from 3 V supply. The common mode rejection of the VCO control lines is more than 2000 at DC. The new differential charge pump architecture provides common mode correction without the need for a clean reference.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.