Design Con 2015
Breaking News
Comments
Newest First | Oldest First | Threaded View
Page 1 / 3   >   >>
M5NOMAD12
User Rank
Rookie
re: CMOS oscillator said to beat quartz
M5NOMAD12   11/2/2010 11:36:20 PM
NO RATINGS
Aging? What about the Aging? Will they spec 1 year and add that in the 100 PPM spec? What does it do 3 to 5 years down the road. Short Term Stability? 457 femtosecond phase jitter. Yes but defined over what range? The range where the LC oscillator is optimum? Achieves -140dBc/Hz phase noise; yes but at what offset frequency? Yes but I have 1 more question to ask; if this is such a great technology then what happened to Mobius Microsystems? Why was it acquired by IDT earlier this year.

agk
User Rank
Rookie
re: CMOS oscillator said to beat quartz
agk   10/31/2010 6:53:00 AM
NO RATINGS
Yes to the words of silicon guy and Frank. CMOS oscillator soon going to replace the crystal oscillators with many advantages like cost,accuracy and integarability,quick start up time,low jitter etc.

gautham
User Rank
Rookie
re: CMOS oscillator said to beat quartz
gautham   10/30/2010 4:40:09 PM
NO RATINGS
Yes, I've been following these guys since they published their work at the ISSCC 2007: http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4077168 when they were still Mobius Microsystems. If I remember correct, the paper mentions using an elaborate digital calibration with the aid of an external reference clock to achieve sub-100ppm setting accuracy.

Code Monkey
User Rank
Rookie
re: CMOS oscillator said to beat quartz
Code Monkey   10/29/2010 7:18:34 PM
NO RATINGS
I'm sure OTP fuses or something compensate for process spread. ATE would measure the 3GHz and program the divider accordingly.

Sanjib.A
User Rank
CEO
re: CMOS oscillator said to beat quartz
Sanjib.A   10/28/2010 2:14:47 PM
NO RATINGS
I agree with you. The title could be over-optimistic for the IDT3C02 CMOS oscillator. But this "all-silicon" oscillator could certainly beat the 100 ppm quartz crystal oscillators available in the market...isn't it?

martinm_de
User Rank
Rookie
re: CMOS oscillator said to beat quartz
martinm_de   10/26/2010 7:20:39 AM
NO RATINGS
The length change of silicon is 2ppm/Kelvin Length change of Aluminium is 23ppm/K Copper has 16ppm/K Lets assume that the silicon length change overrides the length change of the metal (whatever is used) , a temperature change of 50 Kelvin causes an inductance change of 100ppm Same for the capacitors, I guess. I have no idea how they trim the circuit to compensate the +/-20% process spread of the capacitors. Laser trimming? I see no space for a fractional PLL.

dnh
User Rank
Rookie
re: CMOS oscillator said to beat quartz
dnh   10/26/2010 1:49:49 AM
NO RATINGS
The title is missleading. 100ppm is nowhere close to even good crystal oscillators, let alone the best. Besides, 100ppm is meaningless without a temperature range. DHorn

jg_
User Rank
Rookie
re: CMOS oscillator said to beat quartz
jg_   10/25/2010 9:45:21 PM
NO RATINGS
I see IDT claim 73c/10K, which is ok, but not much below even Digikey Crystal Osc prices. There are also 1mA Crystal Oscillators, so their claims of lower power is more 'average', rather than comparing leading edge, with leading edge. I can see it has a place, replacing the very bottom spec'd crystals, but Ceramic resonators are more threatened here. The wide supply range is impressive. Missing from their data sheet, is the Base Freq, I see mentioned above as 3GHz. Also missing is any breakout of the 100ppm components : no dF/dT, dF/dV, etc

bfemmel
User Rank
Rookie
re: CMOS oscillator said to beat quartz
bfemmel   10/25/2010 9:31:30 PM
NO RATINGS
I don't think this will be in your new watch anytime soon as it still is in the 2mA range. Quartz oscillators for your watch will be under 1uA.

krisi
User Rank
CEO
re: CMOS oscillator said to beat quartz
krisi   10/25/2010 6:01:18 PM
NO RATINGS
Can anyone explain how this technology works? Any grad student can build LC oscillator that oscillates at hundres of MHz or few GHz (I know first hand, I had a few students who built that)...by neither L or C are predictable so you will get a value of oscillation frequency which will be 20% off or so...you can tune that in with C (using varactor) or less likely with L (using some switches to connect more L if needed)...but how do you maintain that tuning over life of the product, temp changes, VVD variations etc...any hint is appreciated...Kris

Page 1 / 3   >   >>


Top Comments of the Week
Flash Poll
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

Want a Voltera Desktop PCB Printer?
Max Maxfield
15 comments
I just received an email from my chum Javi in Spain. "Have you heard about Voltera (VolteraInc.com)? It's a Canadian company that is going to offer desktop-size PCB printers for fast ...

Aubrey Kagan

Have You Ever Been Blindsided by Your Own Design?
Aubrey Kagan
37 comments
I recently read GCHQ: The uncensored story of Britain's most sensitive intelligence agency by Richard J. Aldrich. The Government Communication Headquarters (GCHQ), Britain's equivalent of ...

Martin Rowe

No 2014 Punkin Chunkin, What Will You Do?
Martin Rowe
2 comments
American Thanksgiving is next week, and while some people watch (American) football all day, the real competition on TV has become Punkin Chunkin. But there will be no Punkin Chunkin on TV ...

Rich Quinnell

Making the Grade in Industrial Design
Rich Quinnell
15 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
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, ...
Doug Bailey, VP of marketing at Power Integrations, gives a ...
See how to ease software bring-up with DesignWare IP ...
DesignWare IP Prototyping Kits enable fast software ...
This video explores the LT3086, a new member of our LDO+ ...
In today’s modern electronic systems, the need for power ...