As with many conferences, DesignCon authors may post their own papers on their companies, universities, or personal web sites. Agilent Technologies, sponsor of DesignCon Community, has made several papers and tutorial slides authored or co-authored by Agilent engineers available for download. You can find them in the information resources section, on the right side of any DesignCon Community page. (You need to register at DesignCon Community to download the papers.) Here's what you'll find:
Tips and Advanced Techniques for Characterizing a 28 Gbit/s Transceiver. At 28 Gbit/s, every interconnect between a transmitter and a receiver affects signal integrity. This paper explains how to measure and characterize a transmission channel's transmission lines, vias, IC packages, and connectors to best view what's happening to your signals.
Slides: DesignCon 2013: Challenges With Jitter, 3-hour tutorial takes you through the test issues surrounding serial links starting at 10 Gbit/s. The slides cover jitter measurements on transmitters and channels, so you can see what a receiver sees. The paper also covers clock recovery, jitter spectrum analysis, oscilloscopes, and noise.
DesignCon 2013 Paper: Effects of Temperature and Relative Humidity in Transmission Systems Using Differential Signaling. Every time serial-data rates increase, new issues arise that were negligible at lower speeds. This paper looks at how temperature and humidity affect differential signals. The authors experimented using a Samtec "Golden Standard" reference microstrip. The authors measured differential S-parameters, near-end crosstalk, and far-end crosstalk with a vector-network analyzer. As you might expect, temperature and humidity make a difference. Download the paper to find out how.
Slides: DesignCon 2013: Making DDR4 Work for You, 3-hour tutorial explains how to make the transition from DDR3 to DDR4 in computer memory systems. In going from 2133 Mbit/s to 3200 Mbit/s, the window for bit timing shrinks by 34 percent. That makes jitter an even bigger problem to solve to keep bit-error rate down. DDR4 also reduces voltage rails from 1.5 V to 1.2 V, making power integrity a larger contributor to bit errors. This presentation discusses design rules, electrical length, serpentine routing, mask margins, and testing.
DesignCon 2013 Paper: Innovative Defense Techniques for Damping Digital to RF Crosstalk covers how today's high-speed digital signals and RF signals can interfere with each other. You'll learn about how to use simulation to get an idea of possible EMI issues before building a prototype. You'll learn how antenna design and shielding can affect crosstalk in a portable device such as a phone or tablet computer.
DesignCon 2013 Paper: End-to-End Link Analysis and Optimization with Mid-channel Redrivers AMI Models, written by engineers from Maxim Integrated and Agilent, explains how to model a transmission channel and measure its characteristics. The redriver used here is a MAX3997, which operates at speeds up to 10.7 Gbit/s. The paper compares simulations to measured results.