RESUME — Akos Szoboszlay, BSEE; Electrical Design Engineer

Analog (low-noise, sensors, servos) and digital (FPGAs, processors, C)

Nov. 2015. This resume will no longer be updated on this website due to the way internet search has changed.

 

Akos Szoboszlay, BSEE

San Jose, CA 95126      (in Silicon Valley, next to San Jose, CA)

Phone: (deleted to avoid robo-call harvesting).

Email:        job-akos-ee  (place the @ here)  akos.us

 

This abridged resume (5 pages, akos.us/resume) omits obsolete technology and omits some details.

The full version of my resume (8 pages) is available upon request and at:  akos.us/resume-full

 

USA citizen; Security clearance: secret (expired)

Availability:  immediate

Objective:  Looking to utilize my widely varying experience on either a contract or permanent basis.

 

Professional Summary: Electrical design engineer (BSEE) with over 20 years experience:

•   Analog design, including precision low-noise circuits, servos, robotics, sensors, DC-DC power supplies;

•   Digital design, including FPGA/CPLD in VHDL or Verilog, processors, C/assembly programming;

•   Communication skills:  documentation, former newsletter editor (volunteer) and I give presentations.

•   I do efficient, high quality work and can show samples. I design, debug, test and document.

 

Education:

BS EE, June 1974, San Jose State University.

"Feedback Control Systems" 1-year course, 9/77 - 6/78 , San Jose State University.

Patent:

"Height Control for Agricultural Machine"; designed feedback control system (servo) for controlling sickle height, and included ultrasonic distance measuring and LVDT for feedback.

Photos and description of my patent design are at:  lownoisedesign.com/harvester.html

Design skills summary:

•   Analog design:  motion servos with various feedbacks, low-noise sensors (gyro, optical, RTD, others), temperature control, low-noise yet efficient DC-DC power, phase locked loops (PLLs)

•   Motors, mechanical motion in my servo designs:  DC motors, brushless DC motors (BLDC), linear DC motors, stepping motors, voice-coil motor, piezo, hydraulic cylinder.

•   Servo loop compensation, four methods used: Matlab/Simulink, Dynamic Signal Analyzers (DSAs), PID (in software), and “lab” analog techniques with intuitive knowledge.

•   Camera circuit design (see Gatan and Night Vision Technologies) and video design (Compression Labs)

 

Tool and instrument skills summary:

•   Simulation: SPICE (TINA, LT SPICE, others). Used MatLab/Simulink in 2001 and earlier.

•   Instruments:  Dynamic Signal Analyzers (DSAs), HP 3562A and Agilent 35670A; spectrum and FFT analyzers; many types of oscilloscopes (favorite is LeCroy), logic analyzers (including Agilent 16700).

•   Schematics:  Orcad (by Cadence). Previously used others (DxDesigner, Allegro-Concept).

•   FPGAs, CPLDs:  VHDL or Verilog using Xilinx ISE or Altera Quartus 2. 

•   Programming:  C and Assembly Languages; PIC processors, 68xxx series and others.

Experience (abridged version):

Portions of 2014 and 2015;  Self-employed

•   Designed device to measure ultrasonic sound (frequency and magnitude).

•   Designed for low noise, high sensitivity, high dynamic range and battery power.

•   Analog design: low-noise pre-amp, filters, log amp, exponential circuit, VCO, active filters, audio amp.

•   Designed 300 VDC power supply for low-noise and efficiency. It was a resonating type (sine wave).

•   Simulated analog portions in SPICE using TINA for noise and frequency response.

•   Simulated filters using on-line tools (from ADI and TI) including worst-case tolerances.

11/14 – 2/15; Boston Scientific    Contract Electrical Engineer

•   Solved EMC (Electro-Magnetic Compatibility) design errors in existing medical pump for catheter.

•   Performed Surge and EFT/B (Electrical Fast Transient/Burst) tests to IEC60601 using Thermo EMC-Pro.

•   Solved false triggering of very sensitive sensors (bubble detectors) during EMC testing.

•   Designed filters and shielding, selected/placed ferrite beads, and solved board level design errors.

•   Solved problem in another product, catheter “Pod”: coil inductors of filters were magnetically coupled.

•   Simulated: Used SPICE (TINA-TI) for simulation of filters, including parasitic values.

1/12 - 7/13; Abbott Laboratories, Diagnostics (Hematology) Div. Senior Electrical Engineer

•   Designed pre-amps containing transimpedance amplifiers and optical sensors of 3 types: PMT (photomultiplier tube), APD (avalanche photodiode) and PD (photodiode) for hematology/blood analyzer.

•   Designed board, Optical Bench 1, containing analog signal processing, processor (ARM Cortex), ADCs, DACs (to set gains, high voltages), SPI bus for on-board devices, CAN bus, analog output drive, etc.

•   Designed the on-board power section. The analog rails had no visible switching noise on the scope.

•   Created error budget for the gain tolerance spec for the APD channels. Calculations showed closed-loop was required to keep APD gain constant. The traditional method is open-loop using a thermister.

•   Designed closed-loop control of APD gain, which varies greatly with temperature and voltage, using an LED of constant brightness for frequent, automatic calibration. This loop went through software that set APD voltage via a DAC and HV Supply. I also designed an inner, analog servo loop to keep LED light constant despite LED aging and temperature effects, by using a stable photodiode in the loop. (See details.)

•   My design was low-noise, high gain, bandwidth up to 10 MHz. Designed system-level noise reduction.

•   I have a low error-rate: All boards I designed worked on the very first FAB/Assembly with only minor rework, including Optical Bench 1 with 22 schematic pages. I had 20 boards built per type, initially.

•   Documented above by block diagrams (Visio), SPICE simulations (TINA), schematic (Orcad), layout/artwork instructions (Word), BOM (Excel), SW-HW interface spec (Excel, Word), Test Procedures and Test Results (Excel, Word). I made presentations and conducted Design Reviews.

•   Selected FFC cables and connectors of 0.5 mm pitch to reduce force on optically-aligned pre-amp boards.

•   Used documentation-management software (TeamCenter by Siemens).

8/11 - 10/11 Crossing Automation (acquired by Brooks Automation)   Contract Servo Engineer

•   Designed motion control for servos using PID.

•   Spreadsheet calculations for DC motor with PWM drive, inertia, stall conditions, required current, voltage, encoder (50,000 count/rev.). Selected PID parameters. Achieved spec of Intel “S” trajectory.

•   Achieved 1 micron repeatability of wafer alignment respect to wafer notch. Wafer was 450 mm diameter.

•   Analyzed power requirements for 5-axis (of motion) wafer transporter by increasing wafer to 450 mm dia.

2/11 - 4/11 Apple     Contract Senior Electrical Engineer    

•   Battery charge and discharge circuits (“Battery Management Unit”) with 0201 size parts.

•   Did worst-case analysis (using spreadsheets), prototype testing, and wrote test procedures.

•   Solved and documented current leakage problem (sub microamps) for store-shelf battery life.

•   Used Kikusui programmable load (controlled current or resistance), scope, DMMs, power supply.

11/08 - 7/10 Nikon Research Corporation of America    Analog and FPGA consultant

•   Analog and digital design for low noise, high-accuracy motion control for (IC) wafer steppers.

•   Designed 22-bit resolution DAC circuit for servo use. (Then, the best DAC chip was only 18-bit.)

•   Used Dynamic Signal Analyzer (DSA), Agilent 35670A, for measuring frequency response and noise.

•   Created PSD plots and plotted total in-band noise, in Vrms, using DSA.

•   Designed FPGA (Xilinx Virtex 4) in VHDL for above DAC project. Used Xilinx ISE and ModelSim.

•   More of my designs for Nikon Research are in listed in three different sections, below. (Search “Nikon”.)

2/08 - 4/08 Aoptix Technologies   Analog consultant

•   Analog engineering: improved servo loop response and reduced noise for adaptive optics (for laser communication); Transimpedance Amplifier (TIA), ADC and system grounding portions.

•   Used FFT Analyzer for noise measurement (Stanford Research 770).

7/07 - 10/07 Clarity Medical Systems   Contract senior electrical engineer

•   Designed low noise circuits: optical sensing, gain and true positive integrator (for rail-rail I/O).

•   Spice simulation using LT SPICE. Noise calculations using speadsheet.

•   Designed control circuits. Selected MOSFETs, calculated heat and used safe operating area.

•   Designed audio tone generator.

•   Orcad schematic capture.

•   Troubleshooted high voltage circuits for xenon (flash) tube lamps, for in-house xenon testing.

•   Used LeCroy oscilloscope, including waveform storage and transient calculations.

3/06 - 3/06: Nikon Research Corporation of America   Analog consultant

•  Low-noise circuit for geophone vibration sensor (Geospace # GS-11D)

•  Calculated values (in Excel) for op amp circuit to create virtual negative resistance or positive resistance (in series with the coil resistance) to change the damping factor of the geophone.

12/05 - 2/06 KLA-Tencor:  Contract analog engineer

•   System grounding, DC power distribution, power supply specifications for wafer inspection tool.

•   Also see prior contract (analog and FPGA) below (search KLA-Tencor).

4/04 to 5/05: Gatan, Inc.   Contract electrical engineer,  camera product

Designed controller -- analog / digital circuit board and C programming -- for CCD imaging (camera) for electron microscopes:

•   Designed five DC-DC converters (step down, step up, inverting, and variable output) followed by linear regulators, filters. Achieved low-noise and efficiency goals.

•   Achieved goal of no detectable DC-DC switching noise in image and by using proper grounding techniques --despite the length of the power-signal cable being 5 meters.

•   Designed PID servo loop for temperature control by TEC (Thermo-Electric Cooler or Peltier Device), including servo compensation, and wrote the program in C language.

•   Designed low-noise (linear) current drive for TEC. Designed variable voltage-output DC-DC.

•   Designed circuit board with the above plus these: PIC processor (18LF452), FPGA (Xilinx Spartan 3), LVDS (for cable), 60 MHz oscillator (120 MHz clock).

•   Used DxDesigner. Used Pads Viewer for artwork checking.

•   Wrote real-time control program for PIC processor (18LF452) using C compiler (CCS # PCWH)

1/03 to 4/03, 7/03, 10/05: Nikon Research Corp. of America   Analog and FPGA consultant

Various designs for wafer steppers. 

•   Designed and tested controller for motion/force control.

•   Interfaced to Encoder, Load Cell and Power Amplifier.

•   Achieved 1/2 LSB noise on 12-bit ADC conversions (at 1 KHz sampling) with wiring connected.

•   Another project:  Designed serial clock recovery at 180 MHz using PLL.

•   Solved intermittent bad data problem in a prior system caused by poor design.

•   Another project:  Altera FPGA design on purchased interface type circuit board (Technobox).

1/02 to 3/02: Systron Donner Inertial Division     Contract analog and servo engineer

•   Various EE tasks with gyro (MEMS tuning fork) and accelerometer circuits:

•   Used Dynamic Signal Analyzer (HP 3562A), rate tables and shakers.

•   Devised testing of frequency response, scale, etc. Wrote test procedures after devising and performing the tests. Many tests used an oven/cooler chamber, testing from –40C to +85C.

•   Solved 60 Hz noise problem in shaker’s power amp output caused by poor wiring/grounding.

•   Used LeCroy oscilloscope for data capture, testing of saturation recovery, and to view amplitude during frequency response tests to prevent saturation.

•   Solved noise problem in extremely sensitive gyro tuning fork circuit using both HP 3562A and data logger for CAN bus (Canalyzer). Found problem by gradually cutting/drilling board and adding tiny coax cables: A via with digital signal was too close to an analog trace. Rework fixed it.

•   Did EMI susceptibility test in shielded chamber (with help from the in-house expert).

This was not a design job, but it was a lot of fun!

9/01 - 11/01 Arista Networks:    Electrical engineer, analog

•   Designed precision temperature using Thermal Electric Cooler (TEC) and RTD platinum sensor.

•   Angle sensing circuit using magnetoresistance Wheatstone bridge (HMC1501).

•   Selected DAC, Sigma-Delta ADC, RTD, all operating from same Vref to cancel drift error.

•   Used Orcad. Used Excel for calculations of drift, accuracy, stability from –5C to +65C.

9/00 - 4/01 KLA-Tencor  Contract analog and servo engineer, dark field wafer scanner product

•   Designed Auto Focus Sensor Board at the block level for minimum drift errors, noise and phase lag. Selected critical components: op amps, ADC, Vref, analog switch, DAC.

•   Used MatLab/Simulink for modeling of servos (including piezo driven actuator) and signal processing (FFT, filters, etc.).

•   Used Dynamic Signal Analyzer (HP 3562A) to obtain servo loop response and take noise measurements of existing system.

•   Another project: Designed Altera on a Direct Digital Synthesis Chirp Board. Used MaxPlus2.

10/99 - 6/00 Inviso    Analog engineering consultant

Designed audio (codec, microphone, audio amp), charger for NiMH battery and DC-DC converter.

Selected components (ICs, speaker, MOSFETs, ferrites, etc.). Used Orcad schematic capture.

 

9/99 - 10/99 and 3/00 Night Vision Technologies   Engineering consultant, camera product
Designed processor based circuit board for an infra-red camera: This included Hitachi 7729 (RISC with DSP), 66 MHz bus, SDRAM, Flash, FIFOs, DMA control, and PLD for glue logic (Altera 7000 using MaxPlus2, VHDL). For debug, included JTAG port for emulator, PROM debugger, RS232 and LEDs. Designed temperature control for heat/cool thermoelectric device.

9/95 - 5/96 Nikon Research Corp. of America   Contract analog and servo engineer

•   Designed motor control, power amplifier and servo electronics for LCD panel manufacturing (similar to lithographic stepper). Interfaced to VME bus.

•   Calculated motor spec's and power amplifier component values using EXCEL.

•   Used MatLab/Simulink for simulation, Dynamic Signal Analyzer (HP 3562A) for test.


1/95 - 5/95 Compression Laboratories Inc.   Contract electrical engineer, video product

•   Designed conversion of digital video to NTSC / PAL Composite Video and added closed-captioning.

2/87 - 10/90 Lockheed, Dept. of Servos, Mechanisms and Robotics  Analog and servo engineer

•   Designed inertial sensor (analog and servo design), DC to 300 Hz (±0.25 dB flat, DC to 18 Hz).

•   Designed servos for gimbal, sinusoidal rate table (with optical feedbacks), Inertial Angle Sensor capture loops. To see an official Lockheed photo of me and 3 of my servo design, go to:

            lownoisedesign.com/lockheed.html    For details of these, see my full resume.

•   Used Dynamic Signal Analyzer (DSA) (HP 3562A) for frequency response, noise (PSD and rms), compensation of servo loops, obtaining open loop poles&zeros from closed loop. Used “synthesis” feature to insert compensation network and to insert “shaping filter” for flattening gain.

•   Designed other analog circuits: Friction/Stiction emulator; Phase Locked Loop (PLL) to search for phase needed for noise cancellation (of Gyro spin frequency); data acquisition (to 68020 ΅P).

•   Used SPICE program (Analog Workbench) on Sun 3 computer.

2/86 - 7/86 Eaton Microlithographic Systems Division   Analog and servo engineer

Designed servos for lithography / wafer stepper: position/velocity profile servo for shutter; linear brushless DC motor servo for reticle transporter. Also designed a constant amplitude (16 bit accuracy, 10 ppm/C) pure sine wave oscillator to drive the LVDT feedback. (It had –61 dB harmonic distortion). Used Dynamic Signal Analyzer (HP 3562A) for servo analysis.

5/80 - 9/80 and 6/81 - 10/81 Blackwelders    Analog and servo engineer, obtained patent

Designed control system to automatically control height of the sickle on a tomato harvester. Feedback included ultrasonic distance measurement (with PLL and small echo from calibration bar for nulling sound velocity). Obtained patent. See photos: lownoisedesign.com/harvester.html

For more experience and details, see my full resume (8 pages) at:  akos.us/resume-full

 

Other Skills:

Communication:

•   Clear, complete technical specifications for software, layout/artwork, test and calibration procedures. My motto is, “If not sure, put it in so they won’t ask later.”

•   I was told that I was the “best spec writer” by a software programmer.

•   Documented my designs to whatever level desired. Sometimes I wrote a manual. Use Visio.

•   I create and give Powerpoint / Keynote presentations.

•   Newsletter Editor (volunteer from 1982 to 1999) and Webmaster for Modern Transit Society.

•   Political achievements: Lead successful effort for bike-lanes (completed) and sidewalks (approved) along all seven expressways (which are arterial roads, 45 to 50 mph) in Santa Clara County, despite opposition from highway and traffic engineering departments of the County and of the cities. This required good communication skills and I won at the County Board of Supervisors and City Councils. For example, notice both sidewalks and bike-lanes along Lawrence Expressway, completed circa 1996, which were the result of my efforts. Details are at:     moderntransit.org/expressway.

Hobbies:

• Bicycling, hiking, travel

Languages: Fluent in Hungarian (Magyar), close to fluency in Spanish.

References:

Given upon request after an interview because some agencies use references for solicitation purposes.