Embedded Systems Conference
Breaking News
Comments
Newest First | Oldest First | Threaded View
MikiW
User Rank
Author
re: National Semiconductor: Software defined radio: Don't talk to me about ENOBS (Part 1 of 2)
MikiW   1/28/2012 4:31:24 PM
NO RATINGS
Hi, Where can I find the second part of the article?

Scott NSC
User Rank
Author
re: National Semiconductor: Software defined radio: Don't talk to me about ENOBS (Part 1 of 2)
Scott NSC   9/27/2010 3:10:57 PM
NO RATINGS
Hi Frank, The new 12-bit ADCs use a folding and interpolating architecture and they are manufactured in a CMOS process. Thanks, Scott

old account Frank Eory
User Rank
Author
re: National Semiconductor: Software defined radio: Don't talk to me about ENOBS (Part 1 of 2)
old account Frank Eory   9/24/2010 5:38:47 PM
NO RATINGS
Keep in mind SDR is still mostly a military thing -- it has a ways to go before it's cost-effective and low enough power for everyday commercial applications. A product brief on National's website says 4.1 watts @ 1.9V in a 292 pin thermally enhanced BGA package. You're clearly not going to put that in a cell phone, but that's not the target market. Scott, is this a continuous time sigma delta architecture? Can you tell us if it's CMOS, SiGE, or what?

Jaspreet.Singh
User Rank
Author
re: National Semiconductor: Software defined radio: Don't talk to me about ENOBS (Part 1 of 2)
Jaspreet.Singh   9/24/2010 12:48:18 AM
NO RATINGS
What is the power consumption and cost of the 12-bit 3.6 Gsps ADC ? I suspect it might still be too high to prohibit its use for commercial applications. What do you folks think about the future trends? As far as my understanding goes, it might be a long time till we have low-cost low-power Gsps ADCs. Good thing nonetheless is that there is growing awareness among academicians as well about the associated signal processing challenges posed by this ADC bottleneck. There have recently been efforts towards exploring design with extremely low-precision ADCs (1-4 buts), and also massively parallel time-interleaved ADCs that can provide higher resolution.

Pazhy
User Rank
Author
re: National Semiconductor: Software defined radio: Don't talk to me about ENOBS (Part 1 of 2)
Pazhy   9/23/2010 8:11:05 PM
NO RATINGS
Thanks for the article. A wideband ADC will also pick up wideband noise and interferers. This will reduce the dynamic range of the ADC.

Jayakumar
User Rank
Author
re: National Semiconductor: Software defined radio: Don't talk to me about ENOBS (Part 1 of 2)
Jayakumar   9/23/2010 7:41:45 AM
NO RATINGS
Very interesting to read about this article and we will look forward to read part 2. Speed in which ADC samples is very important and the same define how close we are towards true SDR. Do we have FPGA fabric to handle 3.5 GSPS samples and create I and Q channel and perform other operations in it. It is clear that present generation DSP’s may not able to do, but if these ADC’s fit in PCI or PXI bus of INTEL processors then we might able crank some amount of computations. Still challenge is there the way we do signal processing in Digital Part. May be we need to look at Neural Network based algorithms and innovation to work with high speed data at one side and very low speed decisions at other side of network. I am keen on looking for part 2 of Scott and hope he does touches the above part. (jk@epigon.co.in)

old account Frank Eory
User Rank
Author
re: National Semiconductor: Software defined radio: Don't talk to me about ENOBS (Part 1 of 2)
old account Frank Eory   9/20/2010 11:27:38 PM
NO RATINGS
Interesting article Scott, and I look forward to Part 2. It's true that digital radio designers are more interested in specs that are not typically quoted for ADCs. It would eliminate a lot of the guesswork if comms-oriented ADCs quoted perfomance data on parameters like IMD and NPR.



Top Comments of the Week
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Max Maxfield

March 28 is Arduino Day -- Break Out the Party Hats!
Max Maxfield
6 comments
Well, here's a bit of a conundrum. I just received an email from my chum David Ashton who hails from the "Unfinished Continent" Down Under. David's message was short and sweet; all he said ...

Bernard Cole

A Book For All Reasons
Bernard Cole
1 Comment
Robert Oshana's recent book "Software Engineering for Embedded Systems (Newnes/Elsevier)," written and edited with Mark Kraeling, is a 'book for all reasons.' At almost 1,200 pages, it ...

Martin Rowe

Leonard Nimoy, We'll Miss you
Martin Rowe
5 comments
Like many of you, I was saddened to hear the news of Leonard Nimoy's death. His Star Trek character Mr. Spock was an inspiration to many of us who entered technical fields.

Rich Quinnell

Making the Grade in Industrial Design
Rich Quinnell
16 comments
As every developer knows, there are the paper specifications for a product design, and then there are the real requirements. The paper specs are dry, bland, and rigidly numeric, making ...

Special Video Section
After a four-year absence, Infineon returns to Mobile World ...
A laptop’s 65-watt adapter can be made 6 times smaller and ...
An industry network should have device and data security at ...
The LTC2975 is a four-channel PMBus Power System Manager ...
In this video, a new high speed CMOS output comparator ...
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...
General-purpose DACs have applications in instrumentation, ...
Linear Technology demonstrates its latest measurement ...
10:29
Demos from Maxim Integrated at Electronica 2014 show ...
Bosch CEO Stefan Finkbeiner shows off latest combo and ...
STMicroelectronics demoed this simple gesture control ...
Keysight shows you what signals lurk in real-time at 510MHz ...
TE Connectivity's clear-plastic, full-size model car shows ...
Why culture makes Linear Tech a winner.
Recently formed Architects of Modern Power consortium ...
Specially modified Corvette C7 Stingray responds to ex Indy ...
Avago’s ACPL-K30T is the first solid-state driver qualified ...
NXP launches its line of multi-gate, multifunction, ...
Radio
LATEST ARCHIVED BROADCAST
EE Times Senior Technical Editor Martin Rowe will interview EMC engineer Kenneth Wyatt.
Flash Poll