A programmable phase rotator based on time-modulated injection-locking

Author

O´Mahony, Frank ; Casper, Bryan ; Mansuri, Mozhgan ; Hossain, Masum

Author_Institution

Intel Corp., Hillsboro, OR, USA

fYear

2010

fDate

16-18 June 2010

Firstpage

45

Lastpage

46

Abstract

A 7-bit 360° phase rotator in 45nm CMOS interpolates between coarse phases by modulating the injection point of an oscillator. This architecture decouples phase resolution from device sizing. INL and DNL are improved by independently adapting the delay of each oscillator stage. A digital phase-locked loop using a time-to-digital converter based on a tracking ADC keeps the oscillator tuned to the injection frequency. The measured DNL and INL at 4.05GHz with phase calibration are 0.4 and 1.2 LSBs, respectively, while consuming 14.3mW.

Keywords

CMOS integrated circuits; analogue-digital conversion; injection locked oscillators; programmable circuits; CMOS; coarse phases; device sizing; digital phase-locked loop; injection frequency; phase resolution; programmable phase rotator; time-modulated injection-locking; time-to-digital converter; tracking ADC; Clocks; Delay; Frequency modulation; Jitter; Oscillators; Phase locked loops; Strontium; I/O; injection locked oscillator; phase rotator;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Circuits (VLSIC), 2010 IEEE Symposium on

Conference_Location

Honolulu, HI

Print_ISBN

978-1-4244-5454-9

Type

conf

DOI

10.1109/VLSIC.2010.5560263

Filename

5560263