Re: [802.3BA] 40G CMOS Ref
Ali-san,
I'm Kazuyuki Mori, Fujitsu Labs. Matt-san may misunderstand for your
question.
The eye diagram of page 11 in traverse_02_0708 is our test chip result using
65nm standard CMOS. It was a first time for showing this data in a public
place, so there is no paper about this. The circuit architecture is almost
the same as our 90nm design shown in ISSCC2005 8.2.
Kazuyuki Mori
----- Original Message -----
From: "Frank Chang" <ychang@xxxxxxxxxxx>
To: <STDS-802-3-HSSG@xxxxxxxxxxxxxxxxx>
Sent: Thursday, September 04, 2008 10:16 AM
Subject: Re: [802.3BA] 40G CMOS Ref
Ali;
I have interest to understand this as well. I feel the laser driver doesnot
have to be CMOS such as in 10G for better performance.
I think what in Matt's slides actually talking about the high-speed driver
portion of the CDR, which indicated in its Ref.1 of pg.11 by Toifl. Here is
what I can find from google search for this Ref.
ISSCC2007
12.3 A 72mW 0.03mm2 Inductorless 40Gb/s CDR in 65nm SOI CMOS
9:30 AM
T. Toifl, C. Menolfi, P. Buchmann, C. Hagleitner, M. Kossel, T. Morf, J.
Weiss,
M. Schmatz
IBM, Rueschlikon, Switzerland
A quarter-rate CDR circuit is based on a dual-loop approach where sampling
phases are
generated by a phase-programmable PLL that is controlled by a digital DLL.
Implemented in 65nm SOI CMOS, the chip occupies 0.03mm2 and consumes
1.8mW/Gb/s. Measurements confirm 40Gb/s operation with a BER <10-12 at a
maximum
frequency-offset of 400ppm. The phase relation between data and edge samples
can be
programmed within ±0.1UI.
________________________________
From: Ali Ghiasi [mailto:aghiasi@xxxxxxxxxxxx]
Sent: Wednesday, September 03, 2008 4:53 PM
To: STDS-802-3-HSSG@xxxxxxxxxxxxxxxxx
Subject: Re: [802.3BA] 40G CMOS Ref
Matt
I looked at reference on page 8 Yagisawa-san's paper title "Compact
40-Gbit/s Electroabsorption Monolithically
Integrated DFB Laser (EML) Module with a Driver IC for Very Short Reach
Application". The EML driver
IC is not described in this paper, but to drive an EML I expect the driver
IC to be either in InP or SiGe.
Based on this driver data how did you arrive at the following statement on
page 11 "40 Gb/s Driver Output Waveform In
65 nm Standard CMOS"? You are using InP or SiGe driver performance as proof
that 40Gb/s is possible in
65 nm CMOS!
Thanks,
Ali
Matt Traverso wrote:
Ali,
The reference for page 11 is the same as the reference on page 8 --
Yagisawa-san's paper. My apologies that this was not clearer in the
presentation.
--matt
On Wed, Sep 3, 2008 at 3:14 PM, Ali Ghiasi <aghiasi@xxxxxxxxxxxx> wrote:
Mat
I was reviewing your presentation from Denver traverso_02_0708. On page 11
you show an eye diagram
under sub-title "40Gb/s Driver Output Waveform in 65 nm standard CMOS", I
assumed the reference for
this eye diagram was included in one of the 3 reference listed on this page.
Can you please provide the
supporting material for reference eye diagram.
Thanks,
Ali