Recent advances in delay cell VCOs [application notes]
Document Type
Article
Publication Date
8-1-2011
Abstract
Voltage-controlled-oscillators (VCOs) are the heart of every wired and wireless communication system, including phase-lock-loop (PLL), clock-data-recovery (CDR), serial-link-radio, digitalmillimeter-radar (DMR) [1], CPUs, and microprocessorbased systems [2] [3]. Low phase noise and wideband frequency coverage are two of the most crucial issues in VCO design(s) [4]. Monolithic VCOs have two main topologies: the ring VCO and inductance (L) and capacitance (C) VCO. Ring structures provide a wide tuning range, inferior phase noise performance (because of their low quality factor), smaller layout area, lower dissipated power, and less design complexity compared to LC structures [5].
Keywords
Delay cell, Design complexity, Dissipated power, Layout area, Low phase noise, Low qualities, Phase noise performance, Ring structures, Ring VCO, Voltage controlled oscillator, Wide band frequencies, Wide tuning range, Wired and wireless communications, Communication systems, Global system for mobile communications, Phase noise, Program processors, Telephone systems, Variable frequency oscillators, Wireless telecommunication systems, Delay lock loops
Divisions
fac_eng
Publication Title
IEEE Microwave Magazine
Volume
12
Issue
5
Publisher
IEEE