Product Selector Parametric Search Data Sheets Evaluation Boards
USB Hard Disk Drives Display/Digital TV Printers Spread Spectrum Clocking
CHO Technology White Papers Technical Publications Application Notes Layout Guidelines Webinars Frequently Asked Questions
Contact Us About Mobius Management Team Board of Directors Technical Advisory Board Investors Careers Brochure Company Backgrounder
News Room EventsBrochureCompany Backgrounder
Mobius Whitepapers

Microwaves & RF
August 2007

CMOS Clock Approach Breaks Quartz Tradition
Abstract: This technology provides accurate frequency generation entirely in standard CMOS, a task formerly accomplished exclusively with quartz resonators and crystal oscillators. Clock generation generally evokes images of quartz crystals and quartz-crystal oscillators. The technology has existed since before World War II and has provided reliable reference signals in communications systems around the world. If ever a technology could be considered "disruptive," it would be the one that displaced or at least provided an alternative to quartz crystals for this task. As will be shown, that technology exists and is based on the fabrication of reference signal sources entirely with silicon CMOS technology, forming a line of signal generators called CMOS Harmonic Oscillators (CHO™) [read more]
Planet Analog
January 2007		 Basics of Selecting the Optimal Frequency Source For an Application -Part 1 & 2
Abstract: This article analyzes various frequency sources available to the design engineer, from both technical and business perspectives, with the goal of helping select the right frequency source to meet specific system requirements. Because they are by far the most popular, this article will examine quartz-based crystal oscillators in particular, and describe their applications, advantages and disadvantages. Given the rapid growth of consumer electronics, some limitations of quartz crystals have become more pronounced. The article also reviews several recently proposed alternatives to quartz crystals and describes their key properties, such as ceramic resonators and CMOS resonators.  [read more]