Journal
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
Volume 59, Issue 8, Pages 1694-1705Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCSI.2012.2206496
Keywords
Capacitive coupling; Colpitts; ISF; phase error; phase noise; quadrature; RF; voltage-controlled oscillator
Categories
Funding
- U. S. Army [W15P7T-09-C-S320]
Ask authors/readers for more resources
This paper presents a 0.6-V quadrature voltage-controlled oscillator (QVCO) with enhanced swing for low power supply applications. The QVCO comprises a novel capacitive coupling technique that is employed not only for quadrature signal coupling, but also for phase noise reduction. As a result, the proposed QVCO can even achieve 4.6 dB lower phase noise than its single-phase counterpart at 3-MHz offset. Optimized capacitive coupling combined with source inductive enhance-swing technique enables low power and low phase noise simultaneously. The QVCO achieves a measured phase noise of -132.2 dBc/Hz @ 3-MHz offset with a center frequency of 5.6 GHz and consumes 4.2 mW from a 0.6-V supply. This performance corresponds to a figure-of-merit (FoM) of 191.4 dB. Due to the intrinsic phase shift in the proposed quadrature-coupling path, the problem associated with +/- 90 degrees phase ambiguity between the quadrature outputs has been avoided. The QVCO RFIC is implemented in a 0.13 mu m CMOS process with core area of 0.6 x 0.8 mm(2).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available