Departmental Papers (ESE)


This paper presents an extended frequency range CMOS monolithic voltage-controlled oscillator (VCO) design. A negative feedback control algorithm is used to automatically adjust the VCO range according to the control voltage. Based on this analog feedback control algorithm, the VCO achieves a wide range without any pre-register settings. Low phase noise is achieved by using both coarse control and fine control in VCO. A 600 MHz to 3.3 GHz monolithic CMOS PLL based on this wide range and low phase noise VCO has been fabricated in TSMC 0.18 μm, 1.8V CMOS technology and is used in many different applications such as FC, GE, and SONET etc.

Document Type

Conference Paper

Date of this Version

September 2002


Copyright 2002 IEEE. Reprinted from Proceedings of the 9th IEEE International Conference on Electronics, Circuits and Systems (ICECS 2002), Volume 2, pages 425-428.
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VCO, PLL, voltage-controlled oscillator, phase-locked loop, phase-noise



Date Posted: 24 November 2004

This document has been peer reviewed.