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Analog & Mixed Signal

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Analog & Mixed Signal

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Analog-Mixed-Signal

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The Analog & Mixed Signal Community discusses technologies and applications in that tidy bit of spectrum between DC and daylight. These include, but are certainly not limited to, signal conditioning and processing, energy management, functional monitoring, and communications. Due to the nature of the analog-digital interface (itself an analog construct) this community also discusses data converters, PWMs, and other discrete-time objects the performance of which depends on one or more continuous variable. Analog: There’s no Digital Abstraction without it!

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Monday, 02 November 2009

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Joshua Israelsohn

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Optimal Configuration of your Reconfigurable PLL

Optimal Configuration of your Reconfigurable PLL

by Erik Mentze, Sr. Systems Engineer, Cypress Semiconductor

The goal of any frequency synthesizer is to, based on a given input reference frequency, generate a desired output frequency. However, this relationship between available input frequency and required output frequency is not always obvious. The question always looms: is there another, better configuration for my PLL that would give me better noise performance and lower power? Sometimes the question is critical as to whether the current hardware is even able to meet new requirements (does a solution exist?) This article introduces a method for finding all possible PLL configurations (using integer divide PLLs) that can meet a given set of input / output frequency requirements. A metric is then applied to this complete list of configurations to determine the “best” configuration for your specific application.

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Optimal Configuration of your Reconfigurable PLL

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Community Wall

Mike Burr, 2011-06-20 06:10:55

Another Analog design guru lost this week. Bob Pease lost in a vehicle accident, after departing Jim Williams memorial service. Rough week for the Analog communit. :(

http://electronicdesign.com/Blogs/JoeDespositosBlog/tabid/727/entryid/164/Bob-Pease-Killed-in-Car-Crash.aspx

Joshua Israelsohn, 2009-12-04 21:59:28

Folks, a short time ago, Daniel Payne posed a question on the Community Wall that I believe is more likely to be answered in bits and pieces from many sources than in a single statement from one community member. For this reason, I've moved the topic to Community Discussions under the title "Behavioral Modeling for Analog & Mixed-Signal Design. Take a look and ring in if you can shed some light on the subject. If you can't but you >know< somebody who can, please invite them to join the community and share their insights.

Joshua Israelsohn, 2009-11-17 07:31:56

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Joshua Israelsohn, 2009-11-16 03:56:41

Welcome to the World

Despite proliferating so-called digital circuits (technically, analog circuits that operate nonlinearly to provide a physical implementation of a digital abstraction) our world—the source and destination for signals and data—steadfastly remains an analog system. There’s hardly an area or application in our industry—from power supplies to photonic interfaces—that doesn’t depend on the multiparametric behaviors of physical devices and interconnects.

So that, in an outsized nutshell, is what the Analog & Mixed Signal Community is about. It’s a huge canvas—far bigger than one person can fill—which is why I’m using my first stroke of the brush to invite your participation. Read and respond, or better still, initiate topics you believe are of interest to the rest of the Community. Meanwhile, I look forward to our interactions.