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horta1212
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re: CogniPower among the giants at APEC 2013
horta1212   3/23/2013 6:31:50 AM
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I'd be more interested to see how it operates at frequencies other than 1k. The way their signal looks, at 10k to 20k their harmonic distortion would go through the roof.

Tom Lawson
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re: CogniPower among the giants at APEC 2013
Tom Lawson   3/25/2013 7:05:18 PM
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You are looking at a version of the amplifier aimed at voice for cell phones. Depending on which screen shot you are looking at, it is either 10 kHz or 15 kHz, with the amplifier clocked at 166kHz. Contact me at tlawson@cognipower.com, and I will send you a screen shot of a 20 kHz sine wave with the same amp being clocked at 1 megahertz. A very small notch filter removes the carrier frequency quite nicely.



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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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