Robert M. Wheatley
1544 Rosewalk Lane
Roanoke, VA 24014-7201
Phone 888-858-8194 or 540-904-0101
FAX 540-427-1489
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Dec 1994 -
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 Robert
Wheatley Consulting Services LLC ; Roanoke, VA
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Present
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Consultant
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Telecom / Datacom:
Designed Data Interface for a High
Speed Data Recorder,
which included line drivers & receivers for differential ECL, and
LVDS. Designed control logic for Disk Storage, SCSI Bus, Local
Bus, and PCI Bus.
Experience gained in Analog Devices' DDS (Direct Digital Synthesis)
frequency synthesizer.
Designed & tested UTP and Fiber Optic
Ethernet hubs & switches. Designed & tested Analog Data Acquisition
systems for
Line Monitors.
Designed CSU/DSU Products for
DDS & T1/FT1 Services. Analyzed and refined Line Build Out Networks
(LBO) for
DDS Products.
Designed data link for long transmission
lines including 2 to 4 wire hybrid interfaces (2 Wire T1 link), and PLLs for clock recovery
& FSK data transmission circuits. Designed and tested serial
data interfaces RS-530, RS-449, V.35, & RS-232.
PLDs / Firmware / Digital:
Designed custom PCI and CPCI interface cards for PC based
product (VHDL). Designed & wrote Bit Error Testing for internal
system test, using Pseudo-Random Number Generator. Devised &
Implemented parallel BERT in an Altera Stratix FPGA using
Quartus (Verilog). Designed & wrote PLDs for packing &
unpacking data, bus control, processor control and FIFO control using
Altera
7000 CPLDs and FLEX 10KA FPGAs in a High
Speed Data Recorder
(AHDL). Designed and wrote firmware for USB Human Interface
Device using Cypress CY7C63221 micro (Assembly Language).
Designed FracT1
drop & insert circuitry using AMD MACH CPLDs (111s, & 120s)
(MACHXL). Designed multiplexing
circuits
with Xilinx CPLDs and FPGAs (Xable). Wrote firmware
for a 68HC05 micro-processor and designed PLD control circuitry (MACH
211s)
for a multi-channel Intercom System.
Experience with PALs such as 16V8s and 22V10s etc (PALASM & CUPL). Designed
custom timing electronics for a Cub Scout Pinewood Derby Track, using
PIC 16F72 Micros (PIC Assembly). Designed KWh Meter for three phase power system
using PIC 18F452 Micro (PIC Assembly)
Analog Circuitry:
Designed simplified Safety Ground Wire Monitor for industrial
applications. Designed circuitry for a Barking Control collar
dogs. Designed and simulated High slew rate (5KV/uS 0-10V) output
stage
for a High Speed DAC. Corrected design problems, reducing the
noise & hum in the audio path of a VoIP Phone
reference design.
Developed a replacement "Ground Monitor" for use in coal mines.
Simulated Video filters, and added SinX/X compensation to a video
filter
for a Digital Video System.
Performed component tolerance analysis on multi-pole Video filters.
Designed 4 wire analog Intercom System for use with 4 wire + E&M telco system. Reconstructed documentation,
performed pSpice simulations, and redesigned semi-custom analog ICs.
Member of design team for a 64 bit
Plasma Driver IC. Redesigned an Optical
Receiver for higher sensitivity. Performed pSpice analysis for
Telco
monitors.
Power Supplies / Power Management / Battery Systems:
Designed power management systems and DC/DC converters for
Telco
products and lap-top computers. Designed Power Supply for battery
powered Portable Data Recorder.
Designed, built, and tested power supply and triggering circuit for Xenon
flasher. Designed, built, and tested Li-Ion battery system with solar
charger.
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Jul 1994 -
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Telecommunications Techniques Corp. (TTC)
(Acterna); Germantown, MD
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Aug 1996
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Senior Electrical Engineer
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Responsibilities include simulation, analysis and design, of analog circuits
used in portable telecom test equipment in an ISO9000 environment. Experiences
gained in data communication test equipment involving T1, DDS, ISDN, and
subscriber lines. Designs included telecom interfaces for copper line transmission,
isolated data acquisition systems, a 50 W triple output, universal input
power supply with battery support and a TIMS product (IEEE 743). Additional
experiences gained in Compliance Engineering (FCC Parts 15 & 68, IEC
950, UL1950 & 1459, CSA22.2), and surface mount technology. CAD experience
gained with Allegro’s "Concept" Schematic Capture.
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Nov 1991-
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Sotas Inc.; Rockville (Gaithersburg),
MD
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Jul 1994
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Senior Engineer
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Responsibilities include all phases of product design, prototyping and
testing. Experiences gained in T3 data communication equipment, and subscriber
line test and monitoring equipment. Designs included high speed serial
data interfaces, RS-530 & RS-232 Interfaces, Telephone DAAs, telco
line monitors, PLLs, power supply & power distribution, and fault switching
circuitry. Experience gained with PALs in T3 Multiplexer using CUPL. Additional
experiences gained in PC based products (DOS), Compliance Engineering,
ATE, and surface mount technology. CAD experience gained with OrCAD.
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Apr 1989 -
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Versitron; Annapolis Junction,
MD (Bear, DE)
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Nov 1991
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Senior Design Engineer
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Responsibilities included all phases of product design. Experiences gained
with fiber optic data and voice communication links, surface mount technology,
and P-CAD. Designs include fiber optic Token Ring products, fiber optic
RS-530, RS-232, and V.24 data links, fiber optic phone systems, switching
power supplies, and a Clock Distribution system.
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Oct 1987 -
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Data
Measurement Corp.; Gaithersburg, MD
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Apr 1989
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Project Engineer
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Responsibilities included product management, circuit design, chassis design,
and product documentation. Experiences gained in industrial measurement
and control systems, and customer service. Designs included electrically
isolated interfaces, switching power supplies, photomultiplier circuits,
servo motor systems, analog measurement and detection circuits.
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Apr 1983 -
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Catalyst Research Corp.; Owings
Mills, MD (MSA Mars, PA)
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Jul 1987
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Electrical Engineer
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Responsibilities included research, product design. Products included a
Pulse Oximeter, portable Oxygen and Carbon Monoxide Monitors, and Electo-chemical
cell interfaces for industrial use. Experience gained in agency approvals
and surface mount production.
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Dec 1982 -
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Bendix EPID; Baltimore, MD
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Apr 1983
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Senior Electronic Technician
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Responsibilities included construction and test of Ion Mobility Detection
Cells for gas identification.
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Apr 1980 -
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Universal Security Instruments; Owings Mills, MD
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Nov 1982
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Senior Electronic Technician
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Responsibilities included supervision and operation of the engineering
lab. Experience gained in prototype circuit construction and product testing
of Security Systems and Telecommunications Equipment.
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Oct 1979 -
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HRB Singer; State College, PA
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Apr 1980
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Field Engineer (at the Washington Support Office)
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Responsibilities included repair and maintenance of the SEL 32 computer
system.
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Apr 1979 -
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Pfizer Medical Systems; Columbia, MD
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Sep 1979
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Production Test Technician Temporary employment through MTD
R&D Corp.
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Experience gained with CAT Scanners and DEC PDP 11/34 computers.
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Feb 1976 -
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Westinghouse Aero-space BWI;
Baltimore, MD
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Apr 1979
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R&D Technician Grade B
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Responsibilities included prototype construction and test of micro-wave
and digital circuits.
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Jun 1969 -
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U.S. Army; Fort Meade, MD
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Jan 1976
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Specialist 5th Class
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Trained to repair Receiver Systems, Wide Band
and Video Recorder Systems and Avionics Radio Systems. Honorable Discharge.
Decorations: Army Commendation Medal - Good Conduct Medal - National Defense
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EDUCATION & CERTIFICATIONS
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2004
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Comptia
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A+ Computer Technician
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1987
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Johns Hopkins University
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Bachelor of Electrical Engineering
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1982
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Catonsville Community College
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Associate in Arts
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1970
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U. S. Army USASATC&S
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Recorder & Receiver Systems Repair
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1969
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Atholton High School
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(College Prep Curriculum)
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Reference List Available -
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