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VNP
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re: Consulting engineer sinks teeth into problematic ultrasonic toothbrush
VNP   7/25/2010 12:16:50 PM
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I like this story. Because it is an example how to cross the border in our mind. Actually it not easy. Good luck.

thebatosai
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re: Consulting engineer sinks teeth into problematic ultrasonic toothbrush
thebatosai   7/25/2010 3:53:39 PM
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I am totally thrilled to read this article. Engineering at its best.

LDM0
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re: Consulting engineer sinks teeth into problematic ultrasonic toothbrush
LDM0   7/25/2010 6:14:04 PM
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As Howard said, the solution is obvious. All one needs to do is recognize the possibility of a problem in the first place. Apparently, there was no tolerance analysis of the original design.

Guru of Grounding
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re: Consulting engineer sinks teeth into problematic ultrasonic toothbrush
Guru of Grounding   7/28/2010 4:14:52 PM
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This sounds like a product that went into production way, way too fast. Just because one prototype worked well, doesn't mean it's ready for production. An engineer who thinks even slightly outside the box should have realized the transducer sub-system is a high-Q thing!

ttt3
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re: Consulting engineer sinks teeth into problematic ultrasonic toothbrush
ttt3   7/28/2010 5:51:21 PM
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I wouldn't solely blame the designers of the product here. The toothbrush manufacturer could have had an issue with the transducer component supplier/manufacturer - i.e. the transducers themselves, being supplied to the toothbrush manufacturer were not being manufactured to the appropriate specifications/tolerances. This happens all the time when developing complex products and it is often impossible to predict lot-to-lot variances on components.

MHK_#1
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re: Consulting engineer sinks teeth into problematic ultrasonic toothbrush
MHK_#1   7/29/2010 4:52:38 AM
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I know such a feeling, taking a customer request and identify their problem with a suggested solution. That is win-win situation. I always wander why such a big company could not figure out the root cause. That is why a consultant is there with a specific expertise. Good job! I hope you are going to have them as a repeat customer.

t.alex
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re: Consulting engineer sinks teeth into problematic ultrasonic toothbrush
t.alex   8/1/2010 6:59:47 AM
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Amazing and admirable! I am just curious I how long it took you for this challenge?



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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