Embedded Systems Conference
Breaking News
Comments
Newest First | Oldest First | Threaded View
Robert Peruzzi
User Rank
Author
re: Embrace formal verification, make more money, take better vacations
Robert Peruzzi   10/29/2010 4:10:59 PM
NO RATINGS
Hello Harry, I am one of those who are passionate about verification. I'm nearly always disappointed to see that the exciting new verification tools only work with 100% digital ICs. Iíve always worked with mixed signal SOCs with digital circuitry in the analog feedback loop. Placing such digital circuitry in a black box with the analog circuitry allows one to use digital verification tools but leaves holes in the verification plan. Here are some mixed-signal building blocks with high-risk digital content. In particular, Iím talking about analog front-end sub-circuits with digital controls that are generated by signal processing the output of the A/D converter. For example: * Automatic Gain Control * Digital PLL (discrete incremental control over sampling frequency and phase) * Adaptive Analog Filters * Built-in Analog Self-Test * Automatic Calibration and Offset Cancelation A workaround is to create a "real" testbench to verify the mixed-signal SOC. In addition, create a "spoof" testbench which quarantines the mixed-signal content to make the SOC look like a 100% digital IC. The real testbench includes assertions for verifying power-up sequencing, bias currents, reference voltages and the validity of digital controls. It also assigns variables such as gain, frequency, phase or other analog quantities versus time, for which assertions are written. I haven't found a way to objectively measure and quantify the completeness of mixed-signal verification -- with or without assertions. I long for the day when verification tools are written to assist the mixed-signal verification engineer with the real SOC testbench. I welcome further comments about mixed-signal verification. Has anyone found solutions to the problems I've described? Contact me via my web page or LinkedIn profile if you have questions of your own, or need help with RF, Analog and mixed-signal SOC verification. Cheers, Bob P. R. Peruzzi Consulting, Inc. URL: www/RPeruzzi.com LI: www/LinkedIn.com/in/Peruzzi



Top Comments of the Week
Flash Poll
Radio
LATEST ARCHIVED BROADCAST
EE Times Senior Technical Editor Martin Rowe will interview EMC engineer Kenneth Wyatt.
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Special Video Section
After a four-year absence, Infineon returns to Mobile World ...
A laptopís 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 ...
Avagoís ACPL-K30T is the first solid-state driver qualified ...
NXP launches its line of multi-gate, multifunction, ...