WILLIAM W. CARR
4301 East Equestrian Trail
Phoenix, Arizona 85044
Phone: (480) 893-7812
email: billwcarr@MSN.COM
OBJECTIVE
A contract electrical engineering position.
QUALIFICATIONS
Thirty-five years working as an electronic design engineer.
A majority of the work was in circuit design and product development.
In many cases, I was responsible for the entire product design package, including concept, design, scheduling, fabrication, testing, documentation and working with the marketing group.
ACHIEVEMENTS
Obtained U.S. patent on a high temperature eddy current proximity sensor. The design involved designing an oscillator circuit that could oscillate with a very low Q coil.
Authored article on eddy current sensors. Article was published in Sensor magazine.
In 2002, successfully completed "Propagation from Devices, Circuit Boards, and the Chassis," a course on Electro Magnetic Compatibility given be Elliot Labs.
PRIOR WORK EXPERIENCE:
12/89 - 11/00 AlliedSignal Aerospace, Senior Engineer.
Designed electronic equipment used for testing AlliedSignal products, including large test stands, test cells, bench test equipment and portable test equipment.
6/85 - 11/89 Sentech Corporation, Senior Engineer.
Worked on development of proximity sensor using capacitance for use in a paper mill. Investigated other applications for the company's sensor.
5/84 - 5/85 ADR Ultrasound, Programmer.
Wrote software in Basic for automatic test equipment.
4/81 - 4/83 Garrett Turbine Engine Company, Engineer.
Worked in lab designing test equipment used for evaluating the performance of turbo-fan engines.
4/80 - 4/81 Motorola Inc., Engineer.
Responsible for the design of the heating coil power section of a gallium arsenide crystal growing furnace.
1/78 - 3/80 Bently Nevada Corporation, Engineer.
Designed electronic instruments and eddy current proximity sensors.
6/70 - 12/77 Arizona State University, Lab Manager/Engineer.
Managed electronic instrument lab. Designed electronic instruments used by research scientists of ASU Physics and Chemistry Departments.
11/69 - 6/70 Motorola Inc., Product Engineer.
Solved production problems in Hi-Rel linear production facility.
6/66 - 11/69 General Electric Company, STEP Engineer.
Engineer on the Space Technology Engineering Program. Training program consisted of six-month assignments in various engineering groups of the General Electric Missile and Space Division. Time off given from work to attend Graduate School.
EDUCATION:
1966 ILLINOIS INSTITUTE OF TECHNOLOGY Chicago, Illinois
Bachelor of Science, Electrical Engineering
1969 UNIVERSITY OF PENNSYLVANIA Philadelphia, Pennsylvania
Completed 30 hours of Graduate School courses
1976 ARIZONA STATE UNIVERSITY Tempe, Arizona
Master of Science in Engineering, Electrical Engineering
1979 UNIVERSITY OF NEVADA AT RENO Reno, Nevada
Graduate studies in field theory
PROFESSIONAL ORGANIZATION MEMBERSHIP:
Institute of Electrical and Electronic Engineers (IEEE)
ACADEMIC HONORS:
DETAILS OF PRIOR DESIGN WORK EXPERIENCE:
AlliedSignal Aerospace
Work consisted of designing test equipment for maintenance of the company's products by aircraft maintenance personnel. The equipment included large test stands, bench testers and portable test equipment. Worked closely with customers and AlliedSignal Field Engineers during the design phases of a project.
Developed a portable tester used to troubleshoot the environmental control system on a Learjet 45 aircraft. This was highly successful product.
Garrett Turbine Engine Company
Designed electronic circuits and instruments for controlling and measuring. One of the more interesting assignments was the destructive test of an aircraft engine.
I was given the task to design a circuit to fire a squib that was buried inside a 731 turbo fan engine. The purpose of the squib was to knock a turbine blade off the rotating fan while the engine was running. This was a destructive test of an engine to obtain FAA certification. The electronics were placed inside the shaft of the engine and were rotating
at 10,000 RPM. I used a capacitive discharge circuit consisting of several transistors and six capacitors in parallel to fire the squib. Since the electronics were rotating, a telemetry signal was used to turn the transistors on and off to discharge the capacitors and fire the squib. It took three tries for a successful test. This was a very high profile assignment.
Motorola Inc.
I was hired to solve a problem with the design of the heating coil power circuits. When power was applied to the coils, a stepper motor would not operate properly. Adding shielding did not solve the problem. For some reason, the engineer who started the project decided to use phase fired SCR controllers. I replaced them with duty cycle controllers that switched the SCR's at the zero crossing. Problem was solved.
Bently Nevada Corporation
The work done at Bently Nevada consisted of analog circuit design, proximity sensor design and analyzing production problems with an existing product.
The analog circuit design involved the development of a circuit for extending the low frequency response of a spring-mass seismic probe. The normal convention of the company was to use a bi-quad filter for this function. I decided to go against convention and use a totally new design. This was a state variable filter in the feedback loop of an operational amplifier. This approach was easier to design and gave better performance than the bi-quad filter.
The company had tried for a long time without success to develop an eddy current proximity sensor that would operate at high temperature (350° F). The maximum temperature range of these devices was 250° F. I came up with a solution that worked extremely well.
Because of my demonstration to solve tough problems, I was asked to investigate a production problem the company was having with their flagship product. This product was an eddy current sensor used to measure vibrations in large turbines. The basic problem was poor yield in production and poor performance in the field. Mathematical analysis showed it was a design fault that could not be fixed.
Arizona State University
Designed electronic test equipment and devices for the Physics and Chemistry Departments. These included power supplies, timers, ramp generators, temperature controllers for ovens and control circuits for an electron microscope.
Designed a Fabry Perot Interferometer mirror control circuit for controlling the mirror alignment of the interferometer. The electronics included analog and digital circuits. This project was also used for Masters Thesis.
General Electric Company
The majority was in analog design with some digital. Designed a synchronous switching power supply for an infrared vidicon. The design consisted of low voltage supplies and a high voltage (1500 volt) supply for the vidicon.
Designed a highly accurate wave shaping for circuit for the Nimbus Satellite. The circuit took a voltage step input and converted it to precision analog output voltage. The waveform had three breakpoints. The mathematical function was exponential-linear-exponential.
Designed a null detector circuit for a star tracker. The most difficult part of this design was the worst case analysis.