(619) 460-4760	Bruce Brentlinger	www.c-lab.com
1991 - 2004	Cornerstone Lab, San Diego CA
Projects are listed in rough reverse chronological order.  Most of the designs 
involved a team of other engineers and scientists of various disciplines.  The 
last sentence of each listing describes the level of involvement in each 
individual project.
*	Modified existing Automatic Test Equipment (ATE) that charged 
capacitors to discharge them.  The tester tower had eight levels; each level 
tested 256 10 Farad capacitors.  Re-routed power, modified circuit cards, 
corrected the control panel to add the discharge feature and notify the user 
of charging status.  Involved reverse engineering, redesign and some 
electronic circuit design.
*	Designed a card to combine two 5 Farad ultracapacitors into one 
package (PC5-5) with integral active balancing circuit.  Then combined 
these cards into a panel of 195 cards with stiffener for mass production.  
Involved concept development, electronic circuit design, schematics and 
printed circuit card (PCB) (PCB) layout.
*	Developed a Mobile Visibility Transmissometer (MVT) test 
instrument for measuring laser performance at three different wavelengths in 
the field.  Designed a card to drive the lasers and a card to receive the laser 
transmission.  The receiver used an innovative signal magnification circuit 
that measured small variations in signal strength.  The system features 
uniform laser output over time using a feedback control circuit, 
thermoelectric cooler controls for laser cooling; heater controls for coping 
with outdoor environmental conditions; data collection via a programmable 
data logger; wireless data communication via cellular telephone.  Involved 
concept development, electronic circuit design, system engineering, block 
diagrams, schematics, printed circuit card (PCB) layout, cabling, harness, 
interconnects, test and integration.
*	Developed a general-purpose smart-card reader circuit card.  
Featuring an Atmel AT91 ARM Thumb microcontroller; universal serial bus 
(USB); designed in four 1.1" square cuttable and stackable sections; copper 
trace antenna embedded in circuit card; radio frequency and microcontroller 
circuits on the same card.  Involved collaborative electronic circuit design, 
schematics and printed circuit card (PCB) layout.
*	Designed two cards for a 48-channel Automated Accelerated 
Characterization Test Station (AACTS) that distributed power and signals 
for low noise measurement over tri-axial controlled-impedance paths 
embedded in the circuit card.  The station tested RF semiconductors such as 
discrete (MESFETs, HBTs, Diodes, etc.), monolithic microwave integrated 
circuits (MMICs), hybrid microwave integrated circuits (HMICs) at 
temperatures up to 250 degrees C.  Involved concept development, 
electronic circuit design, system engineering, block diagrams, schematics 
and printed circuit card (PCB) layout.
*	Developed an interface card for a Free Space Optical (FSO) 
communications system based on Long Wave Infra-Red (LWIR) all-weather 
optical wireless (AOW) technology.  Featuring multimode 1300nm fiber-
optic or copper inputs and conversion of these inputs to a level (Emitter 
Coupled Logic [ECL] or Positive-referenced ECL [PECL]) compatible with 
a Quantum Cascade Laser (QCL) input; temperature sensing and control of 
laser temperature using thermoelectric coolers; control of laser power, bias, 
and modulation; conversion of outputs from a proprietary laser detector to 
multimode 1300nm fiber-optic or copper outputs; high-gain automatic gain 
control (AGC) amplification, 
limiting or direct connection of the detector signal; signal processing of the 
detector signal using adaptive clock and data recovery with a programmable 
continuous non-return-to-zero (NRZ) frequency coverage from 10 megabits 
per second to 2.7 Gigabits per second; continuous non-invasive bit error rate 
monitoring; communication protocol independent - gigabit Ethernet, 
Synchronous Optical Network (SONET) Optical Carrier (OC) OC-1 
(51.84Mbps) /OC-3 (155.52Mbps) /OC-12 (622.08Mbps) /OC-48 
(2.488Gbps); in-circuit programmable microcontroller; test mode for 
alignment; user control panel interface with buttons and 8-character dot 
matrix alphanumeric programmable display.  Involved concept 
development, electronic circuit design, system engineering, block diagrams, 
schematics, printed 
circuit card layout, firmware, cabling, harness, interconnects, test and 
integration.
*	Developed access control smart-card reader circuit cards for a wall 
mount application to control building access.  Featuring an Atmel AT91 
ARM Thumb microcontroller; optically isolated Wiegand interface; 
universal serial bus (USB); Ethernet; copper trace antenna embedded in 
circuit card; radio frequency and microcontroller circuits on the same card.  
Involved collaborative electronic circuit design, schematics and printed 
circuit card (PCB) layout.
*	Developed and built an over-voltage protection card that protected 
Ultracapacitor testers from the test power supply.  It could handle a 20A 
load and had a fully adjustable trip point.  Involved concept development, 
electronic circuit design, system engineering, schematics, test and 
integration.
*	Designed a power backplane for a front replaceable modular DC 
(direct current) 300-watt power supply used in a Z-ATX rugged military 
computer workstation.  Involved some electronic circuit design, schematics 
and printed circuit card (PCB) layout.
*	Designed a backplane for the TranzPak 7 hot-pluggable IDE hard 
drive used in a Z-ATX rugged military computer workstation.  Involved 
some electronic circuit design, schematics and printed circuit card (PCB) 
layout.
*	Designed a flexible circuit for use inside a TranzPak 7 hot-pluggable 
IDE hard drive used in rugged military computer workstations.  Involved 
some electronic circuit design, schematics and printed circuit card (PCB) 
layout.
*	Developed concept and designed five cards (backplane, motherboard 
docking card, front panel, motherboard I/O, and rear I/O panel), for a Z-
MPU rugged high performance military multi-processor computer system.  
Featuring hot-swappable environmentally Sealed Computer Modules (SCM) 
and TranzPak 7 disk modules; multiple platforms (Intel, Sun, IDE, SCSI) 
and multiple operating systems can run together simultaneously; access to 
Shared Peripheral Clusters through a matrix-switched array of USB 
peripherals that can be dynamically switched to any SCM; an embedded 
processor for monitoring system health and watch-dog activity.  Involved 
concept development, electronic circuit design, system engineering, block 
diagrams, schematics and printed circuit card (PCB) layout.
*	Investigated and evaluated new lasers, detectors, modulators and 
electronic devices; generated characteristic curves, eye diagrams, and 
researched the feasibility of electronic circuit designs to incorporate these 
new devices into an all-weather optical wireless (AOW) communications 
system.  Designed electronic related portions of lab setups for research and 
demonstrations that required Bit Error Rate Testers (BERT), Digital 
Phosphor Oscilloscopes (DPOs), TEC (thermoelectric cooler) controllers, 
acousto-optic modulators and drivers, thermal imaging equipment, CO2 
lasers, Quantum Cascade Lasers (QCL), Helium-Neon lasers, and other 
types of lasers, proprietary detectors, optical tables, various lenses, 
reflectors, beam splitters, and optical power meters.  Set up and integrated 
electronic and optical 
equipment; directed lab personnel, performed optical alignments (visible 
and invisible), and verified performance with comparison to competitors 
equipment.  Involved concept development, consulting, reverse engineering, 
redesign, electronic circuit design, system engineering, block diagrams, 
cabling, harness, interconnects, test and integration.
*	Developed an access control smart card reader concept for a wall 
mount application to control building access.  Featuring a MachZ (x86 
system-on-a-chip) microprocessor; 16Mb DRAM; 16Mb Flash; Ethernet 
interface; optically isolated inputs/outputs for door control, motion 
detectors, door switches; several types of serial interfaces.  Involved concept 
development, collaborative electronic circuit design and block diagrams.
*	Developed access control smart-card reader circuit cards for a wall 
mount application to control building access.  Featuring an MCORE 2107 
microcontroller; optically isolated outputs, copper trace antenna embedded 
in circuit card; radio frequency and microcontroller circuits on the same 
card.  Involved collaborative electronic circuit design, schematics and 
printed circuit card (PCB) layout.
*	Wrote device drivers for a real-time broadcast-quality digital video 
over Internet protocol (IP) gateway.  Based on the Intel strong-arm 
1200/PCI processor, it involved C programming of device drivers for the 
Jam Player - for JTAG (Joint Test Action Group) programming of FPGAs 
(Field Programmable Gate Arrays); buttons; LCD; video, sound, and Inter-
IC (I2C) two-wire serial bus chips.  Involved firmware, test and integration.
*	Designed a card to combine two 5 Farad ultracapacitors into one 
package.  Then combined these cards into a panel of 195 cards with stiffener 
for mass production.  Involved concept development, electronic circuit 
design, schematics and printed circuit card (PCB) layout.
*	Designed multi-function 20 cell 4 Farad ultracapacitor tester with a 
5A peak discharge per cell (100A fully loaded).  It is capable of manual 
(pushbutton) or programmable automatic charge/discharge cycling and 
automatic leakage testing through a programmable data logger.  It also has 
the flexibility to be connected to a Bitrode cell tester.  Involved concept 
development, electronic circuit design, system engineering, block diagrams, 
schematics and printed circuit card (PCB) layout.
*	Designed a backplane for the TranzPak 7 hot-pluggable IDE hard 
drive used in a Zxi rugged rack mount military computer workstation.  
Involved some electronic circuit design, schematics and printed circuit card 
(PCB) layout.
*	Designed a low profile Bus Master Ultra DMA PCI to IDE adapter 
card for use in rugged military computer workstations.  Involved electronic 
circuit design, schematics and printed circuit card (PCB) layout.
*	Designed the front panel card for a real-time broadcast-quality 
digital video over Internet protocol (IP) gateway.  Involved electronic circuit 
design, schematics, printed circuit card (PCB) layout, firmware, test and 
integration.
*	Reduced size and optimized design of a smart card reader 
connectable to the Internet via a serial connection to a personal computer.  
Featuring copper trace antenna embedded in circuit card; 9V battery 
powered; radio frequency and microcontroller circuits on the same card.  
Involved collaborative electronic circuit design, schematics and printed 
circuit card (PCB) layout.
*	Designed a portable smart-card reader circuit card that plugged into 
a Handspring Visor springboard expansion slot.  Featuring 16Mb Flash 
memory; AAA battery power; copper trace antenna embedded in circuit 
card; radio frequency and microcontroller circuits on the same card.  
Involved collaborative electronic circuit design, schematics and printed 
circuit card (PCB) layout.
*	Developed concept for an embedded system in a Local Multipoint 
Distribution Services (LMDS broadband wireless 24/28GHz) network 
transceiver.  The design involved control and monitoring of proprietary 
monolithic microwave integrated circuits (MMICs); telemetry 
modulator/demodulator and switch; in-circuit programming, diagnostics and 
test; power supply and power distribution.  Also worked on an up/down 
converter for a cable modem demonstration requiring some microwave 
design in the 900MHz range.  Involved concept development, electronic 
circuit design, system engineering and block diagrams.
*	Designed packaging and layout of fiber-optic based triggering 
instruments for disarming nuclear warheads.  Controlled the impedance 
using micro-strip and other high-speed digital design methods.  Designed 
sheet metal enclosures, front and rear panels, silkscreen and finish.  Handled 
enclosure fabrication, printed circuit card (PCB) fabrication, and final 
assembly.  Delivered 12-channel and 4-channel rack mount units and one 
tabletop unit completely assembled and ready to use.  Involved some 
electronic circuit design, schematics, printed circuit card (PCB) layout and 
mechanical engineering.
*	Developed charge balancing cards for 2700 Farad capacitors used in 
multiple cell banks for high current powercache applications.  Balancing 
was user enabled with a very low quiescent current of 26uA and a maximum 
drive current of .5A.  Typical units provided 1.6KWm to 2.3KWm (Kilo-
Watt-minutes) of power for telecom, medical, industrial and other industries 
that require high reliability bridge power.  Involved concept development, 
electronic circuit design, system engineering, schematics, printed circuit 
card (PCB) layout, test and integration.
*	Designed a multi-function 78 cell tester for stacked 10 Farad 
ultracapacitors (PC10).  It is capable of manual (pushbutton) or automatic 
operation through a programmable data logger; charge/discharge cycling; 
automatic leakage testing; and user selectable parallel or series modes.  
Involved concept development, electronic circuit design, system 
engineering, block diagrams, schematics and printed circuit card (PCB) 
layout.
*	Designed a 256 cell 10 Farad ultracapacitor (PC10) tester card that 
resided in 8 rack pneumatic powered tester.  The 16" by 18" card was 
capable of manual or automatic leakage testing of capacitors through a PC 
based data acquisition system.  Involved electronic circuit design, 
schematics and printed circuit card (PCB) layout.
*	Designed two cards that simulated an application specific integrated 
circuit (ASIC) for a contactless smart card with an embedded chip and 
antenna that communicates via radio frequency with special readers at the 
point of entry into transit fare gates, ticket vending machines (AVM), 
parking systems, and potentially, building doors and airport boarding gates.  
Features a Field Programmable Gate Array (FPGA); design of a custom 
enclosure with power supply.  Involved collaborative electronic circuit 
design, schematics, printed circuit card (PCB) layout and mechanical 
engineering.
*	Designed three 26 cell over voltage protection and balancing cards 
for 2700 Farad ltracapacitors (PC2500).  Two of which were bus cards that 
routed the signals from the cells.  Involved reverse engineering, redesign, 
electronic circuit design, schematics and printed circuit card (PCB) layout.
*	Designed a smart card reader connectable to the Internet via a serial 
connection to a personal computer.  Featuring copper trace antenna 
embedded in circuit card; 9V battery powered; radio frequency and 
microcontroller circuits on the same card.  Involved collaborative electronic 
circuit design, schematics and printed circuit card (PCB) layout.
*	Designed a pair of optical sensor cards (transmit and receive) for 
sensing coins falling through a return chute.  Featuring closed-loop feedback 
for self-adjustment of optical output to compensate for aging, dirt build up 
and extend the life of components.  Involved collaborative electronic circuit 
design, schematics, printed circuit card (PCB) layout, cabling, harness, 
interconnects, test and integration.
*	Developed an over discharge protection circuit and a constant 
current/voltage pulse width modulated 3A battery charger for a sealed lead 
acid battery back up.  And integrated it into a microcontroller based alarm 
module.  Involved electronic circuit design, collaborative electronic circuit 
design, schematics, test and integration.
*	Designed a card that simulated an application specific integrated 
circuit (ASIC) for a contactless smart card with an embedded chip and 
antenna that communicates via radio frequency with special readers at the 
point of entry into transit fare gates, ticket vending machines (AVM), 
parking systems, and potentially, building doors and airport boarding gates.  
Featuring generic array logic (GAL) and discrete logic components; design 
of a custom carrying case/enclosure with power supply, internal and external 
cabling.  Involved collaborative electronic circuit design, schematics, 
printed circuit card (PCB) layout, firmware, cabling, harness, interconnects 
and mechanical engineering.
*	Designed a card to replace an obsolete 50 Volt bi-polar full bridge 
motor driver.  Featuring discrete power Metal Oxide Semiconductor Field 
Effect Transistors (MOSFETs) controlled by programmable logic with 
current sense control inputs for over current protection, and a very compact 
1.25-inch by .6-inch printed circuit card (PCB) layout.  Involved electronic 
circuit design, schematics, printed circuit card (PCB) layout, firmware, test 
and integration.
*	Designed a card for controlling movement in a ticket transport 
mechanism.  Included motor drivers, solenoid drivers, and optical sensor 
inputs.  Involved collaborative electronic circuit design, schematics, printed 
circuit card (PCB) layout, cabling, harness, interconnects, test and 
integration.
*	Designed four cards for various automatic fare collection (AFC) 
machines including a card that processed turnstile gate sensor inputs using a 
32 bit microcontroller, and 24 Volt optically isolated inputs; a power 
distribution card for gates; a power failure monitor; and redesigned a 
solenoid and sensor interface card.  Involved collaborative electronic circuit 
design, schematics, printed circuit card (PCB) layout, test and integration.
*	Designed I/O expansion cards for an automatic ticket vending 
machine (AVM).  Featuring computer controlled voice output, audio 
amplifiers, cascaded Direct Audio Storage Technology (DAST) or a speech 
synthesizer, programmable logic, and multiple serial channels.  Involved 
collaborative electronic circuit design, schematics, printed circuit card 
(PCB) layout, test and integration.
*	Redesigned a magnetic stripe ticket reader interface card for an 
automatic ticket vending machine (AVM) and designed a microcontroller 
based hopper security module.  Involved collaborative electronic circuit 
design, schematics and printed circuit card (PCB) layout.
*	Designed seven cards for various automatic fare collection (AFC) 
machines including a switch interface; a UPS interface that sends a power 
fail signal from an uninterruptible power supply to a serial port; an aisle 
sensor pulse modulator/driver; a serial adapter for a voice module; extender 
cards for maintenance; and a smart card target interface.  Involved 
schematics and printed circuit card (PCB) layout.
*	Designed several cards for industrial ultraviolet water disinfection 
machines.  Including a programmable logic controlled 28-lamp system 
activity monitor featuring high voltage current sensing, lamp life timer, 
lamp failure alarms, and AC to DC power supply.  Involved concept 
development, electronic circuit design, system engineering, schematics, 
printed circuit card (PCB) layout, firmware, test and integration.
*	Designed a 254nm light-sensing unit to monitor radiation levels; and 
redesigned an electronic ballast resulting in 23% higher output while 
lowering power input by 15%.  Involved concept development, electronic 
circuit design and schematics.
1989 - 1991	International Lottery & Totalizator Systems, Carlsbad CA
These projects were for computerized ticket processing systems for the 
gaming and wagering industry.  An essential part of these systems were 
digital communications among microprocessor based ticketing machines, 
communication controllers that concentrated data, and mainframe computer 
systems.  (A totalizator is a machine that registers bets and computes the 
odds & payoffs for pari-mutuel betting.)
*	Designed a dual channel synchronous differential controller for the 
PC/AT-Bus with daisy chain, multi-drop and arbitration sections.  This 
lowered production costs and increased message handling capabilities.  
Involved system engineering.
*	Wrote software to verify design, to test, and to program boards in the 
production area.  This enabled programmers to concentrate on higher level 
application software.  Involved software engineering, test and integration.
1986 - 1989	Logicon, San Diego CA
The projects here were for military training simulators of various types.  The 
two larger projects were a communications interface for stimulating aircraft 
consoles and an air traffic control tower trainer.  This equipment met 
military specifications.
*	Designed a color recognition circuit for allowing a computer to sense 
the color of light emitted from an air traffic control light gun.  Involved 
concept development, electronic circuit design, system engineering, block 
diagrams and schematics.
*	Designed a computer-controlled audio communication system with 
voice recognition  and voice synthesis, telephone (Kentrox) interface, radio 
transceiver simulation and a data Input/Output subsystem.  Involved concept 
development, electronic circuit design, system engineering, block diagrams, 
schematics, cabling, harness and interconnects.
*	Developed multi-user Computer Aided Design application software 
in C for use on a network of SUN-3 workstations running UNIX.  Involved 
concept development, system engineering, block diagrams, software 
engineering, test and integration.
*	Worked on proposal teams, advising, costing, and writing technical 
portions of proposals.  Involved concept development, system engineering 
and block diagrams.
1984 - 1985	Cubic Corporation, San Diego CA
This was for an Anti-Submarine Warfare (ASW) radar simulator project.  
This equipment met military specifications.
*	Designed an audio communication card using audio amplifier ICs, 
filters, and mixing circuits.  Multi-purpose card had three different functions 
depending on how the card was populated.  This resulted in a 66% savings 
in design, documentation, and production costs.  Involved concept 
development, electronic circuit design, system engineering, block diagrams, 
schematics, cabling, harness, interconnects, test and integration.
1983	Education
*	Rochester Institute of Technology, Rochester NY - BSEE
Skills Summary
*	Programming and Software:  C++, C, assembly language, database, 
html, various windows and unix/linux applications
*	Computer Aided Design:  Schematic Capture, Printed circuit card 
(PCB) Layout (IPC Certified), SPICE, Mechanical 
design, PLDs (OrCAD, Protel, PadsPCB, Solidworks, AutoCAD, and more)
*	Management:  Employees, Subcontracts, Projects, Planning: Tasks 
(WBS), Budgets (M&M), Schedules (Pert)
*	Small Business:  Accounting, Taxes, Finance, and Marketing.