Marcus F. Julian
Technology and product Innovation. Analog, digital and mixed signal design. System architecture and design.
Experienced hands-on entrepreneur with highly developed analog engineering and operational management skills.
Rare combination of deep analytical abilities combined with well developed operational leadership, business development, and project management skills.
Ability to infuse an organization with a sense of urgency and a passion for excellence.
Over 25 years experience in developing and launching a wide range of disruptive technologies
PC and broadcast video,
Consumer electronics (camera and high end audio electrponics)
Implantable, wearable, and diagnostic medical devices.
Strong work ethic that can accomplish aggressive goals and obtain quality results.
Proven expertise in the scientific method of discovery.
Demonstrated ability to pay meticulous attention to critical details.
MIT - BSEE June 1979. Emphasis: Analog Electronics. Thesis Advisor James K. Roberge
MathCad, Matlab, Lisp, LTSPICE, SpiceOpus, Pspice, Xcircuit, Orcad CIS, Excel, Word.
Ultrasound transmit/receive systems and circuits.
High and low power Switching Power supplies.
Low-noise analog sensor Interfaces. TIA Amplifiers.
Embedded Systems, FPGA logic, high speed digital.
Low-noise amplifiers, PLLS, Oscillators.
Digital and analog audio/video.
Low-power CMOS analog and system-level ASIC design, including audio delta-sigma DACS and ADCs, FIR and IIR filters.
Medical devices - 3D intra-cardiac mapping system, flow cytometers, wearable insulin pump, implantable defibrillator.
Consumer - digital video encode and decode, wearable athletic training device, PC graphics card.
Linux, Embedded Firmware: C and Assembly.
Circuit Analysis, Complex problem solver and debugger
Medical Regulatory Design and Testing.
Acutus Medical, Inc., Carlsbad, Ca. June 2010 - Present
Technical Fellow Lead architect and developer of Acutus medical electronics and system
Electronics system architect and sole designer for Gen 1.0 and 2.0 3D mapping systems.
Design and development of Intra-cardiac catheter and electronics for 3D mapping.
Patented design of circuit allowing high-speed low impedance ultrasound and low-speed high impedance physiological signals to co-exist on one electrode, which reduced wire count 50%.
Design of low-noise input amplifiers that were saturation proof during ablation (300Vpp) while still able to detect microvolt signals -- never before accomplished
Design of high spectral purity I/Q localization sources.
Design of a high speed multi-channel (> 100) FPGA based ADC and FPGA 24 bit signal filtering and processing system
Assisted in regulatory testing and verification.
Gen 1.0 systems received FDA and CE approvals.
Stratec Medical, Diatron - Germany and Hungary, June 2016 - Present
Consultant Electronics and system design for innovative laser based Flow cytometers
Architecture and design of next generation flow cytometer electronics.
Design of highly sensitive wide-band photo diode front-end
Analog and digitally based intelligent base-line signal removal processing.
System included an FPGA based signal processing system which communicated to host PC via USB
FPGA based local control of Cytometer motor and sensors
Tandem Diabetes, Inc., San Diego, Ca. 2007 - 2010
Senior Staff Scientist, Director of Hardware Engineering
Built a world-class medical device engineering team from the ground up.
Responsible for the electronic and system design of the tandem pump.
Worked closely with mechanical and industrial engineers to design iphone-like insulin pump.
Developed only available OLED based touch screen interface.
Designed a miniature and water-proof medically isolated USB internal charger for the pump.
Developed LISP based software test suite for the pump.
Design of miniature flyback transformer meeting FDA patient leakage standards
Monitored ongoing product development and spearheaded new product development.
Cameron Health, Inc., San Clemente, Ca. 2003 - 2007
Senior Principal Analog Engineer Acquired by Boston Scientific, Inc., 2012. Cameron Health began as a start-up which developed the first Implantable sub-cutaneous Defibrillator.
Recruited to complete development of mixed signal Analog ASIC for the S-ICD
Led team of engineers in re-design of Analog ASIC. Led effort to re-implement ASIC testing at external vendor.
Led effort to re-implement ASIC test procedures and qualify new vendor
Re-architected and simplified existing ASIC implementation.
Increased switching power supply efficiency from 50 to 80 percent at loads less than 5uA.
Re-implemented front-end design and ADC. Re-design of voltage reference and DAC circuitry.
Reviewed overall system requirements and design and proposed basic changes to analog ASIC to meet system requirements.
Solved complex system level issues during device verification and validation
Solved complex system recovery time issue which involved changes to mechanical and electrical components within the system. Patent applied for.
Design and debug of ASIC test program to meet FDA requirements.
Ultimate Balance., 2002 - 2005
Co-founder, System Architect, Designer Accelerometer-based battery powered wearable athletic training system specifically for tennis.
Wearable battery based Hardware design.
Developed DSP algorithms to differentiate between tilt (gravity related acceleration) and athlete motion-related acceleration.
Wrote firmware in C and Assembly.
Sound Vision, Inc. 2002 - 2003
Chief Competitive Officer Sound Vision was a privately held VC-funded fabless semiconductor company
Worked closely with CEO John Morey and founder Bob Caspe to build company IP patent hardware and software profile.
Investigated additional potential market applications for the use of sound Visions (industry's first ever) single digital still camera ASIC.
Worked closely with potential Fortune 500 ASIC partners for SV’s next generation ASIC.
Idexx Labs, Westbrook, ME. 1998 - 2002
Architect and Designer Idexx Labs is a 2 Billion dollar publicly held company. Architecture of complete analog and digital electronics for flow cytometers, working closely with scientists to determine optimal system architecture.
Design of input TIA amplifier, ADC, DSP signal processing, and embedded motor control and I/O systems. Participated in optics specification.
Developed Visual Basic and LISP applications for GBIP-based system test and verification.
Optiscan Biomedical Corporation, Alameda CA. 1998
Consultant Optiscan was a start-up attempting to develop a non-invasive blood glucose test. Analysis and re-design of an extremely low-noise differential infrared bipolar photodiode amplifier system for extra-cutaneous insulin detection.
Vibrint Technologies, Inc. Bedford, MA. 1995 - 1997
Co-founder/VP/CTO Vibrint was a VC-based start-up acquired by Thompson-CSF
Developed business plan and raised money to fund start-up.
Created software and hardware technical teams. Set up manufacturing.
Architecture and design of a broadcast quality analog and digital MPEG2 video compression system.
New Media Graphics, Inc. Bedford MA. 1994 - 1995
VP of Engineering
Instituted engineering changes to facilitate the manufacture of previously unreliable product.
Stripped down existing engineering team and rebuilt with worldclass hardware and software Engineers.
Successful introduction of new multimedia product at Comdex after only 3 months of development.
Winchester Digital Systems, Cambridge, MA. 1992-1993
Consultant. Design of extremely high precision hybrid analog/digital mirror scanning control system utilizing inexpensive stepper motors as linear galvanometers.
University Of Paris, France. Dept. of Neurology 1993
Consultant Design of Video tracking system for rats in a maze with brain implants. Color-coded LEDs were used to determine rat position and orientation.
Fluent, Inc. Natick, MA. 1989 - 1993
Founder/Director of Engineering/Program Manager Fluent was a VC and Intel investment based start-up and was purchased by Novell, Inc.
Designed ISA Bus digital audio subsystem.
Designed analog video subsystem .
Hired and directed Hardware development team .
Setup, qualified, and managed contract manufacturing.
Responsible for early stage management of software development teams..
Micrologic, Inc. Watertown, MA. 1988 - 1989
Performed a wide range of engineering feasibility studies (RF, infrared, and acoustic) for potential Micrologic customers.
Worked closely with marketing personnel to determine product marketplace, costs, and specifications.
Redesigned LoJack RF police tracker for better performance and reliability using newer technology and more advanced signal processing techniques.
Apollo Computer, Natick, MA. 1987
Consultant Design of PAL/NTSC video frame grabber for Apollo's new workstation product line.
Analog Devices,Chelmsford, MA. 1984 - 1985
Consultant Design of a high speed ( > 150 MHz) PLL communications (FDDI) chip utilizing their new bipolar flash process.
Symbolics Inc. Cambridge, Ma, 1982 - 1985
Member of the Technical Staff Symbolics was an LISP computer company. "Symbolics.com" was the first corporate dot com registration
Developed method to transmit high speed video data over large distances using inexpensive coaxial cable using PLLs.
Designed high performance analog video amplifiers and filter for Symbolics Graphics division.
Responsible for the specification, development, and production of a high resolution monochrome 68000 based embedded system for the 3600 series LISP machines.
Design of 8051 based Digital micro-controller sub-system and interface for console.
ACM SIGGRAPH ’97 (Special Interest Group for Computer Graphics)
RenderComp: The New Editing Work-flow Paradigm for Digital Video Publishing Authored and Presented paper on an application to optimize video quality of MPEG compressed Streams using feed forward and feedback techniques. [Link #1]
Electronics Design News, March 1988.
Novel technique using a switched capacitor filter as a phase detector in a synchronous demodulator. Design of the Month.
Control Engineering, October 1982.
Digital techniques for control of an analog servo motor system.
San Diego, Boston, Metropolitan NY area
U.S. citizen. Former tennis professional, active amateur radio operator extra class (KI6SYM) and experimenter.
73.Flow cytometry-based hematology system Patent number: 6784981
74.Catheter system and methods of medical uses of same, including diagnostic and treatment uses for the heart Patent number: 10004459
75.EXPANDABLE CATHETER ASSEMBLY WITH FLEXIBLE PRINTED CIRCUIT BOARD (PCB) ELECTRICAL PATHWAYS Publication number: 201********
76.IMPLANTABLE CARDIAC STIMULUS DEVICES AND METHODS WITH INPUT RECHARGE CIRCUITRY Publication number: 200********
77.SEALED INFUSION DEVICE WITH ELECTRICAL CONNECTOR PORT Publication number: 201********
78.SEALED INFUSION DEVICE WITH ELECTRICAL CONNECTOR PORT Publication number: 201********
79.ULTRASOUND SEQUENCING SYSTEM AND METHOD Publication number: 201********
80.Adjustable training system for athletics and physical rehabilitation including student unit and remote unit communicable therewith Publication number:200********
81.Multiple Battery configurations in an Implantable Medical Device Publication number: 201********
82.MULTIPLE BATTERY CONFIGURATIONS IN AN IMPLANTABLE MEDICAL DEVICE Publication number: 200********
83.Multiple battery configurations in an implantable medical device Patent number: 8588913
84.End of life battery testing in an implantable medical devicePublication number: 200********
85.Multiple battery configurations in an implantable medical device Patent number: 7962212
86.Catheter system and methods of medical uses of same, including diagnostic and treatment uses for the heart Patent number: 10004459
87.EXPANDABLE CATHETER ASSEMBLY WITH FLEXIBLE PRINTED CIRCUIT BOARD (PCB) ELECTRICAL PATHWAYS Publication number: 201********
88.Consumable tube for use with a flow cytometry-based hematology system Publication number: 200********