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To USB or Not to USB
  • About

    Covering the latest trends and topics in USB IP.

    I started working on USB in 1995, starting with the world’s first BIOS that supported USB Keyboards and Mice while at Award Software. After a departure into embedded systems software for real-time operating systems, I returned to USB IP cores and software at inSilicon, one of the leading suppliers of USB IP. In 2002, inSilicon was acquired by Synopsys and I’ve been here since. I also served as Chairman of the USB On-The-Go Working Group for the USB Implementers Forum from 2004-2006.

    I received an M.B.A. from Santa Clara University and an M.S. in Engineering from University of California Irvine, and a B.S. in Engineering from the University of Minnesota. I’m a licensed Professional Engineer in Civil Engineering in the State of California
    - Eric Huang

Archive for the 'IP' Category

Synopsys wins Innovation Award for USB 3.0 IP

Posted by Eric Huang on 27th April 2010

Synopsys won EDN’s Silicon Intellectual Property Innovation award for our USB 3.0 IP Solution.

This includes USB 3.0 PHY IP, USB 3.0 digital IP, USB 3.0 Verification IP, and our virtual platforms for virtual prototyping of USB.

Here are a few members of our USB 3.0 team with the award

USB 30 team Innovator Award - IMG00296-20100426-2025

My colleague Navraj Nandra blogs our USB 3.0 solution in more detail here. 

We are really excited about winning this award.

In addition, Synopsys won an Innovation award for in “EDA: Front-End Analysis and Synthesis Tools” for the Synopsys "IC Validator in-design physical-verification solution”

Be sure to rate this blog entry below.

Posted in IP, USB 3.0, USB IP | No Comments »

Wireless USB Product Reviews, and Effective Throughput

Posted by Eric Huang on 29th November 2007

The Price of CWUSB products.
As I recall WiFi pairs when they were introduced were $500 or more at their introduction back in before 1999? And that was when $500 was worth something.  I adopted WiFi in 2003 when the pairs cost about $230.  As I recall this is around the time 802.11b was introduced at a price premium in the laptop chipset.  You still needed to buy a router for $120 in those days.  How fast did the throughput those systems run?  Did we need to cut cables in 2000? 2003? Can we live without WiFi today?

$200 is a reasonable price for the first products.
I think the $200 price is reasonable for a first generation device, and for those people willing to accept early data rates and cut 4 cables (not just 1). The throughput isn’t what was hyped, but hey, Draft-N just got there after pre-N has been in the market for 2 years.  When will we see “N” products that interoperate at high speeds?  I see nothing in the press on this.  Isn’t that interesting? Did 802.11b ever achieve 12 Mbps?

Critics of Wireless USB are right.  There must be compelling uses. There must be “decent” throughput.  There must be ubiquity in some device.

BUT, WiFi was ratified in 1997.  CWUSB in 2005.  WiFi started at 12Mbps technology. CWUSB achieves 35Mbps today at 1/2 the price (dollars unadjusted).  My best guess is CWUSB will be at 3x-5x these speeds within 2 years.

Effective Throughput
Lots of questions still on the internet regarding the Effective Throughput of Certified Wireless USB.  I think the article Is Ultrawideband still a viable wireless technology? gives an even-handed review pointing out the technical problems. 
It seems like all the companies with UWB products claim higher throughputs than the current products on the market.  I’m not sure why this data isn’t more publically published.  Alereon’s CEO talks about the performance of Native Devices in his blog.  (A Native device doesn’t use Wired USB.  On your Laptop this means it’s an ExpressCard or integrated into a chipset. )  Alereon observes speeds in excess of 125 Mbps and expects faster speeds by CES 2008. 

Eric is right on his blog.  Native devices will go faster.  We’ve achieved comparable native speeds in our lab with our own IP, but that is a topic for another entry.

I’m looking forward to the WiMedia UWB Technology – A Reality where I’m hoping more companies will demonstrate better throughput.  It’s free in Santa Clara on December 6, 2007.

Posted in Certified Wireless USB, CWUSB, IP, UWB | No Comments »