By Topic

A Distributed Dual-Band LC Oscillator Based on Mode Switching

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Guansheng Li ; School of Electrical and Computer Engineering, Cornell University, Ithaca, NY, USA ; Ehsan Afshari

In this paper, we present a distributed dual-band LC oscillator suitable for low-phase-noise applications. It switches between the odd and even resonant modes of a fourth-order LC resonator. In contrast to other switched-resonator designs, the switches used for mode selection do not carry current, and therefore, do not affect the quality factor of the resonator, which leads to low phase noise. Analysis shows it achieves the same phase-noise figure-of-merit (FoM) as a single-band LC oscillator that uses the same inductor and active core. This was verified by a prototype in a 0.13-μm CMOS process. It draws a current of 4 mA from a 0.5-V power supply and achieves a FoM of 194.5 dB at the 4.9-GHz band and 193.0 dB at the 6.6-GHz band, which is the same as the reference standalone LC oscillator. There is good agreement among theory, simulation, and measurement results.

Published in:

IEEE Transactions on Microwave Theory and Techniques  (Volume:59 ,  Issue: 1 )