Dynamically switched low-phase-noise LC VCO with harmonic filtering

Author

Liu, Peng ; Upadhyaya, Parag ; Jung, J. ; Heo, Deukhyoun ; Kim, Jung-Ho ; Kim, Byung-Sung

Author_Institution

Sch. of Electr. Eng. & Comput. Sci., Washington State Univ., Pullman, WA, USA

Volume

47

Issue

14

fYear

2011

Firstpage

792

Lastpage

793

Abstract

A novel load-independent switched LC VCO with PMOS dynamically switched current source and harmonic filtering is presented. The VCO has been designed and implemented with Jazz 0.18 μm CMOS process. At 5.47 GHz carrier frequency, the VCO achieves a measured phase noise of -122.4 and -102dBc/Hz at 1 MHz and 100 kHz offset, respectively. The VCO works between 5.3-5.7 GHz, which yields a tuning range of 400 MHz. This VCO consumes 4.2 mA from a 1.2 V supply and the figure-of-merit (FOM) is - 190.2 dBc/ Hz, which is among the best published FOM results for 5-6 GHz VCOs in standard CMOS process.

Keywords

CMOS analogue integrated circuits; MMIC oscillators; MOSFET; field effect MMIC; filtering theory; phase noise; switched current circuits; voltage-controlled oscillators; Jazz CMOS process; PMOS dynamically switched current source; bandwidth 400 MHz; current 4.2 mA; dynamically switched low-phase-noise LC VCO; figure-of-merit; frequency 5 GHz to 6 GHz; harmonic filtering; load-independent switched LC VCO; voltage 1.2 V;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2011.0741

Filename

5961264