Currently looking for a position in analog circuit design or maintenance, embedded microcontrollers, Linux development. I have experience in analog and digital circuit design, and am self-taught with microcontrollers and Linux. Finished several IEEE courses in Linux embedded design, and am continuing with courses at UC San Diego extension in C/C++. Ultimately, I would like to contribute
Currently looking for a position in analog circuit design or maintenance, embedded microcontrollers, Linux development. I have experience in analog and digital circuit design, and am self-taught with microcontrollers and Linux. Finished several IEEE courses in Linux embedded design, and am continuing with courses at UC San Diego extension in C/C++. Ultimately, I would like to contribute to a development effort in this area in a professional capacity.
Consultant @ Analog design, C/C++ programming, assembler programming for PIC microcontrollers From January 2009 to Present (7 years) Tenor @ Singer in tenor section for regional first-place barbershop harmony chorus. Vocal Revolution has represented the New England district at International competition for the last two years, and will do so again this summer. Participation in the chorus requires learning and memorizing new material, maintaining active repertoire of music, learning choreography, performance in shows and professional gigs, fundraising. It's a great source of companionship and camaraderie, and I'm proud to be a member of this top-level chorus! From February 2006 to July 2014 (8 years 6 months) Analog Design consultant @ Designed and optimized SPICE macromodel for AD8253, a digitally controlled instrumentation amplifier. Incorporated characteristics of frequency response, power consumption, CMRR, PSRR, noise, slew rate. Digital controls changed gain of device with two-line input. Macromodel accepted and posted on ADI website. To see macromodel, go to
http://www.analog.com/en/specialty-amplifiers/instrumentation-amplifiers/ad8253/products/product.html#product-designtools From March 2008 to August 2010 (2 years 6 months) Enumerator @ Located, interviewed and enumerated non-responsive residents of private homes, group living quarters and apartments. From April 2010 to July 2010 (4 months) Substitute Teacher @ Substituted for classes, kindergarten through high school. Followed lesson plans and improvised curriculum elements. Taught calculus, history, physics, English, general math, band. wind instruments, physical education, grade school general curriculum. From January 2005 to April 2006 (1 year 4 months) Corrective Action Engineer @ Investigated, wrote and completed Corrective and Preventive Actions (CAPAs) for cardiac defibrillators. Accumulated evidence, formulated and executed action plans to close the CAPA. Investigations included material abnormalities, design and obsolescence issues, evaluation of customer complaints about usage and compliance. Continuing Product Engineering duties (CPE) included evaluation of manufacturing and shipping processes, monitoring of failure rates of products, monitoring of vendor performance. Completed all required training for medical device production ahead of schedule. From September 2002 to October 2003 (1 year 2 months) Hardware Support Engineer @ Characterized, upgraded, and redesigned existing circuitry for proprietary component test systems. Wrote C programs to perform characterization tests on performance of circuitry. Designed in-house replacements for obsolete OEM parts. Redesigned existing circuits to address changing manufacturing requirements and historic problems with performance.
- Designed repeater circuitry to replace obsolescent OEM bus repeater for VXI bus communications. Design included schematic entry, supervision and inspection of board layout, testing in the system, and redesign to optimize performance. Released to manufacturing “on-time” to relieve critical parts shortage.
- Redesigned interface module to address communications failures. Analyzed and diagnosed improper bus interface problem, added circuitry to fix. Released to manufacturing.
- Redesigned digital support card. Corrected “sag” in power supply, increased power to relay driver circuits, replaced obsolete components and eliminated rework. Released to manufacturing.
- Tested and analyzed performance of redesigned Quad Voltage/Current source to measure compliance with system requirements. Corrected problems with design. Released to manufacturing.
- Contributed to complete characterization of CTS5340, the latest version of testing systems. Wrote several C programs to exercise digital support circuitry, voltage/current circuitry. From March 1999 to April 2002 (3 years 2 months) Applications Engineer @ Supported entire product line, providing customers with data and expert advice on numerous electronic devices, including precision and high speed op amps, log amps, ADCs, DACs, motor control devices, temperature sensors, signal conditioners. Developed SPICE macromodels for customer use in simulations, maintained SPICE library and responded to customer inquiries.
- Served up to 40 customers daily, assisting with all aspects of company devices. Followed up with research, consultation with product line experts and callbacks to customers. Common problems included: noise, biasing, theory of operation, optimal designs.
- Developed eight SPICE macromodels for high-speed and high-current op amps, matching actual part data sheet characteristics with simulated behavior in SPICE. Developed a SPICE macromodel for the AD623, the first instrument amplifier macromodel with rail-to-rail output stage. Presented paper at internal technical conference on rail-to-rail output stage modeling.
- Completed self-directed coursework in microprocessor and digital electronics. Course included
construction of a breadboard 68008 microprocessor project, including counters, display, RAM, I/O. From August 1996 to March 1999 (2 years 8 months)
Continuing education, Computer Programming @ University of California, San Diego From 2013 to 2014 Computer Science, 3.3 @ Harvard Extension From 2000 to 2002 Master of Science (MS), Electrical Engineering, 3.0 @ University of California, Berkeley From 1983 to 1985 Bachelor of Arts (BA), Chemistry, 3.0 @ UCSD From 1971 to 1975 John Hayes is skilled in: C, C++, Analog Circuit Design, Simulations, Testing, Embedded Systems, Electronics, Power Supplies, Semiconductors, IC, Analog, Microcontrollers, Customer Service, Linux, Microprocessors
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