Expert Witness
Dr. Walker has testified in jury trials and arbitration involving software technology issues. He has been engaged as a "technology neutral" to assist in the resolution and adjudication of electronic discovery issues. Dr. Walker also has significant experience in giving deposition testimony and in preparing declarations and expert reports. Dr. Walker regularly works with attorneys to help articulate and manage the many technology issues that arise in complex litigation. He is particularly adept at explaining complex technology issues to lay audiences and, as such, has often been asked to present Markman tutorials and prepare demonstratives.
ASIC Design Engineer
Dr. Walker is a recognized expert with over 35-years of experience in design of integrated circuits, including analog, digital and RF/microwave circuits. His analog IC circuit design experience includes analog components such as PLLs, voltage regulators and linear systems. In the digital IC design Dr. Walker has experience at the circuit level, including such structures as ESD components, level shifters, sense amps, SDRAM circuits such as DDR sequencing circuits and On-Die Termination (ODT). His RF/Microwave design experience includes microwave components (such as amplifiers, oscillators, mixers and switches) as well as sub-systems (tuners, low-noise down converters, etc).
Electrical Engineer
Dr. Walker has over 25 years experience in electronic design automation (EDA) software systems, simulation and circuit design and modeling. He is a recognized expert in the field of EDA systems, simulation, and modeling. He also has experience with the design of digital and analog IC, with verilog and VHDL analysis, synthesis of digital ICs such as flash memory controllers, analyses and verification of metal interconnects and related process technology. He also has acquired expertise in the analysis of alleged source code copying. He has developed specialized analysis tools that help find the "needle" of copied code in the "haystack" of large source-code databases. He has identified existence of misappropriated code as well as helped to demonstrate the lack of evidence of misappropriation. During the course of his practice, Dr. Walker has analyzed such diverse code as EDA software, VoIP software, database schema, mail-list processing software, and stock-brokerage software. He is familiar with a wide variety of source-code repositories including CVS, RCS, Subversion, and Rational ClearCase.