A voltage‐controlled cmos phase‐shift oscillator for short‐range wireless communications

Abstract

AbstractThis paper presents a voltage‐controlled CMOS phase‐shift oscillator which can output a sinusoidal signal with a simple circuit configuration requiring no on‐chip inductor, which is intended for use in short‐range wireless communications such as a chip‐to‐chip wireless communications interface. A CMOS phase‐shift oscillator is experimentally fabricated by a 0.6‐µm CMOS process, with an oscillation frequency of approximately 600 MHz. Characteristics such as harmonics, the tuning range of the oscillation frequency, and phase noise are examined, and it is found that the proposed voltage‐controlled CMOS phase‐shift oscillator can be used in short‐range wireless communications, thus drastically reducing the circuit size. © 2003 Wiley Periodicals, Inc. Electron Comm Jpn Pt 2, 86(9): 24–30, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecjb.10080