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KRS03
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re: Slideshow: Samsung cagey on smartphone SoC at ISSCC
KRS03   3/7/2013 12:29:57 AM
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Yes, But just imagine the 10x draw on the battery to keep the 5x quad going. Battery weight is the driver here.

Hughston
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re: Slideshow: Samsung cagey on smartphone SoC at ISSCC
Hughston   3/5/2013 3:32:13 PM
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It's not a failure of ARM but a failure of poor system architectures.

AliNS
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re: Slideshow: Samsung cagey on smartphone SoC at ISSCC
AliNS   3/1/2013 6:34:12 PM
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Wow! In this case, it's a big price to pay to have a 5x larger quad-core processor idling by while using the low power core.

Wilco1
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re: Slideshow: Samsung cagey on smartphone SoC at ISSCC
Wilco1   3/1/2013 2:13:39 PM
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Read Anand's article about the Exynos Octa: http://www.anandtech.com/show/6768/samsung-details-exynos-5-octa-architecture-power-at-isscc-13 Around 5W max power for quad 1.8GHz A15 cores is actually amazingly low. That's just 1.25W per core. If anything, the large difference in power between A7 and A15 means that big.LITTLE has achieved its goal. Most of the time you will be running on the A7 cores, thus using only a fraction of the power (about 0.5W for 4 1.2GHz A7 cores according to the graph).

help.fulguy
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re: Slideshow: Samsung cagey on smartphone SoC at ISSCC
help.fulguy   2/28/2013 8:46:56 PM
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big.Little is nothing but a big failure of ARM. The power is going thru the roof to get minor performance gain. ARM has lost the power battle to Intel.

NikhilJK
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re: Slideshow: Samsung cagey on smartphone SoC at ISSCC
NikhilJK   2/28/2013 7:38:07 PM
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I remember this presentation. I was there. Yongmin also talked about body biasing both forward and reverse to boost performance and reduce leakage respectively. So I got to the mic and asked him if they applied body biasing on both pmos and nmos devices or only one of them. He refused to answer. I asked him if he could at least shed some light on how much leakage decrease or what performance boost he got. Again, he refused to answer. Mr Shin was right on one point this is a circuits conference. A conference which is place where you come to share your technologies and ideas and help advance the field. This paper should not have been selected. You cannot mention you tried various power saving schemes without a mention of what the benefit was. The presentation seemed more like a press release rather than a conference presentation. ISSCC should send a clear message. If you want to present here - you have to share information. You cannot use it as a platform to only advertize your wares. In Mr. Shin's defense, he was probably forced to not reveal anything.

mcgrathdylan
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re: Slideshow: Samsung cagey on smartphone SoC at ISSCC
mcgrathdylan   2/28/2013 5:18:29 PM
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A great question. And I must say, when I attend ISSCC and other such conferences, I am always struck with how much technical detail engineers are willing/able to share with a room fully of other engineers, some of whom happen to work for their fiercest rivals. It's got to be a delicate balance. I must also say that I too have observed presentations by Samsung where the presenter did not appear to want to answer detailed questions. Not faulting Samsung for this, but perhaps it is part of that particular company's policy.

rick merritt
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re: Slideshow: Samsung cagey on smartphone SoC at ISSCC
rick merritt   2/28/2013 3:29:55 PM
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What do we share, what do we keep hidden when it comes to our biggest projects and hottest markets?



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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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