R. Peruzzi Consulting, Inc.

Robert O. Peruzzi, PhD, PE
Mixed-Signal Electronics Consultant

Design, Behavioral Modeling and Verification Expertise
Radio Frequency (RF), Analog and Mixed-Signal
Semiconductors, Integrated Circuits (IC) and Systems-on-Chip (SOC)

Expert Witness: Forensic Investigation, Circuit Analysis,
Patent Analysis, Intellectual Property (IP), Patent Infringement. ICs, Modules, and Electro-Mechanical Systems. Requirements and Specifications


Computer Aided Design (CAD) Tools:
Cadence and Mentor Graphics, Verilog-A, Verilog-AMS, VHDL-AMS,
MATLAB, Simulink and HDL-Coder.
 
Emphasizing the integration of multiple model views targeted toward
  • Verification plan driven modeling approach
  • Fast-executing models using real-value techniques
  • System-level design exploration
  • Executable design specs

Why Behavioral Models?

Verification: A complete set of Analog/Mixed-Signal behavioral models is absolutely necessary to verify modern System-on-Chip (SOC) devices or any mixed signal device too large to fit into a Spice simulator.  It is especially critical if there are adaptive digital control loops such as automatic gain control or digitally controlled frequency synthesizers or even automated self-calibration.  With the cost of today's small geometry mask sets it is irresponsible to neglect functional verification, or to "make do" with less than optimal models.
 
System Design: Behavioral models can be the link between high level plans using C, Matlab etc. and the detailed design level of RTL and schecmatic.  Behavioral models may be executed on the same platform as the final design and their output waveforms graphically displayed side by side and compared to those of the final design.  As such, they become an "executable spec" for the final design.

 

Why a Consultant?

Even though behavioral models are absolutely necessary, their creation and maintenance is not a task required twelve months of every year. A common approach is to add model writing to the tasks of circuit designers, but this is not the best approach because
  • An expert designer might see writing models as a tedious chore and his or her best efforts may be inadequate, resulting in bugs escaping through the verification net and into the Silicon
  • Bad models are worse than none at all
    Models may have too much detail in the wrong places and unnecessarily slow down simulation
  • Models may have not enough or too much detail and be too pessimistic or optimistic
A wise alternative is to contract out the modeling work to a consultant such as me, for only as long as needed.
  • I have more than a dozen years of experience in analog behavioral modeling and verification, and have earned battle scars from finding simulator and language bugs never mentioned in tool vendor's training classes
  • I have the experience and judgment to precisely create a model with just enough detail to fulfill the verification plan, execute as fast as possible without neglecting necessary detail, and make the model understandable so it can be maintained and modified once my job is complete.

Expert Witness Case

[Comment from retaining attorney]

"... we got a complete win in the case, including all damages we asked for, attorneys fees and costs. More importantly for you, in her decision, Judge *** found you credible and qualified you as an expert witness (so now you can testify in future proceedings that you have been qualified by a court as an expert in electrical engineering, and your testimony was received into evidence and relied on by the court in rendering its decision).  ... What a case."