John Billingsley Email & Phone Number

Chandler, Az, Us

High-Voltage, Analog, Power, Linear, Mixed Signal, and Micro-controller-Based Mixed-Signal Applications

Rugged Tablet Computers

• Expert in Complex Power Stage Models, Digital Loop Compensation and Solver Optimization• Design Evaluation Boards to enable products in the market place.• Construct and maintain C#, MathCAD and Excel design tools for stress analysis and digital loop compensation / optimization.• Recommend Solutions to specific customer requirements, provide development support.• Investigate Issues with customer applications, drive to resolution.• Authored Ap-Notes, Customer Response documents and internal articles.

Round Rock, Texas, Us

• Designed / Developed Pentium 4, IMVP5 and IMVP6 extreme performance computer power systems.• Resolved Issues with power and analog circuits on Pentium 4, IMVP5 and IMVP6 computer main boards and video boards.• Directed Efforts of Suppliers and OEMs in product development and issue resolution.• Authored / Updated Dell Development Process Documents o DC-DC Regulator Component Qualification Procedure o Test Plans for CPU Vcore and standard DC-DC regulators and battery chargers o Product Power Spec, Functional Plan, Statement of Work, Work Instructions o Templates for Product Compliance, Power Characterization, Design Approach and Stress Analysis o Vendor Selection Process o Article on RMS Currents in Buck Regulator Outputs.

• Owned ~10% of the company, a startup consulting business.• Project Experience included Pentium 4, 82850E (MCH), 82801BA (ICH2), USB, keyboard controllers, medical devices, wireless telecommunications (CDMA).• Analyzed Patents for Inevasibility. Strengthened patent wording. Proved existing patents against competitive products.• Performed Electrical Design Analysis of products per customer’s requirements.• Evaluated customer requirements, provided engineering estimates for contract bids.

Santa Clara, California, Us

Founding Member of Advanced Power Technology Group• Designed voltage regulator circuits for Athlon Core, DDR SDRAM, HyperTransport, AGP. Switchers and linears. Resolved power issues on server and desktop platforms. Highly skilled in Mentor Graphics Design Architect and Layout. Operated PCB mill.• Designed Transient Load Tools. Two generations of tools for six processor packages. Achieved 100% of design objectives, including >400 A/us slew rate. Performed analog and digital simulation with PSPICE. Conceptual mechanical design.• Developed Production Test Fixtures for Voltage Regulator Modules (VRMs). State machine-based designs. Reduced VRM testing time to less than 30 seconds.• Critiqued OEM Motherboard Supplies for nVidia, Gigabyte, Asus, MSI, etc. Established requirements. Performed qualification testing. • Supported Hammer Platform Bringup. Opteron desktop and Server ( 2P / 4P ).

• Lead Electrical Design Engineer for slot1, 440BX, PIIX4e PCI motherboard.• Design experience w/ Intel Pentium II/III, 440BX/EX/ZX and 810 (GMCH/ICH/FWH).• Solved BIOS Deployment Problems on seven Intel-based PC motherboard designs using Phoenix and Award/Medallion BIOS and ACPI.

• Lead Design Engineer for a ruggedized, pen-based portable computer (Hardbody).• Solved legacy design issues regarding battery charger/power conditioner circuits.• Maintained schematics for all portable computer boards (OrCAD).• Reduced EMI problems involving Hardbody in an automotive application.• Evaluated Technologies for product evolution direction - processors and displays.

Dallas, Tx, Us

• Designed Boards for Notebooks: CPU, video, memory (386SX, 486DX, DX4).• Simulated Notebook ASIC Design: PC Chipset with Rambus memory controller.• Achieved/Maintained Certifications for portable computers / docks (FCC/VDE/CE).• Advised Engineers for EMC about electrical, mechanical and layout required EMI features.• Accelerated time-to-market by reducing FCC/VDE/CE qualification time.• Oversaw Lotus Notes Consultant in construction of EMC Test Results Database.• Produced In-Circuit-Emulator Notebooks for BIOS debug.

Dallas, Tx, Us

• Supervised Development Teams in delivery of hardware and software test stations. Designed real-time O/S to emulate H/W environment for the Program-Under-Test.• Designed Interface Controller for Intermediate Frequency sensor test station. Designed state machines using 2Kx8 Registered EEPROMs.• Devised Input/Output Simulator for custom high-speed arithmetic processor card.• Designed, Coded and Tested in PASCAL, VAX DCL, and assembly languages.• Top Secret Clearance active through 1990.

Bs, Electrical Engineering

Coursework, Power Electronics

Bs, Physics