Mark Gurries technical back ground
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Mark Gurries technical back ground
Mark Gurries
Senior Design Engineer Applications at Qnovo
Location
San Francisco Bay Area
Industry
Semiconductors
Mark Gurries's Overview
Current
- Senior Design & Applications Engineer at Qnovo
Past
- Electrical Engineer at Patent Support
- Senior Applications Engineer and Group Leader at href="http://www.linkedin.com/company/apple?trk=ppro_cprof">Apple Inc.
- Analog Systems Engineer at Diasonics Ultrasound (GE medical)
- Lead Power System Engineer at Rugged Digital Systems Inc (Datametrics Corp)
- Manufacturing Analog Test Engineer at Rolm Mil Spec Computers (Loral)
href="http://www.linkedin.com/redir/redirect?url=http%3A%2F%2Fwww%2Esiliconvalleylines%2Ecom%2Fdcc%2Fpresentations%2Ehtml&urlhash=vgZg" target="_blank">Hobby: Digital Command Control
Mark Gurries's Summary
I am a senior analog applications and design engineer/manager with the ability to be a key technical contributer to product design as it relates to system power conversion and management. I have a wide background of design experience in analog power and mixed signal design with my current focus on battery based portable products in both consumer and industrial markets. I have a lot of experience working with people and solving problems.
Specialties
Portable Power Design, DC-DC, Power Management, Battery Systems, EMI compliance, Safety (UL) compliance, PCB design
Mark Gurries's Experience
Senior Design & Applications Engineer
Qnovo
May 2011 – Present (10 months)
Design/development of evaluation (demo) boards and supporting customer applications (integration) for implementation of a next generation charge management systems for lithium ion batteries. The technology will greatly expand existing current in production Li-ion battery performance in terms of cycle life by a factor of 2. The applications range from consumer electronics (notebooks, cell phones, tablets) to transportation (EV).
Electrical Engineer
Patent Support
2011 – 2012 (1 year)
Served as an electrical engineer "Skilled in the Arts" in power supply, power management, memory and mixed signal applications for patents in dispute. I worked on the following patents to date:
5,491,774
5,742,737
5,491,774
5,742,737
Senior Applications Engineer and Group Leader
Public Company; 10,001+ employees; AAPL; Computer Software industry
September 1991 – December 1996 (5 years 4 months)
Notebook Computer Manufacture. Analog Engineer primarily responsible for DC-DC, Battery Charger, Power-Path and misc Analog design including mixed signal of notebooks. This included meeting EMI and Safety requirements. Directly worked with PCB designer to define PCB layout requirements, review/modify layout and give final approval. DC Load complexity ranged from CPU (Core) voltage compliance under transient conditions to noise free sound system supply rails. Defined the power architecture for many product lines that has to support multiple levels of power states. One of the key aspects of the design was efficient DC to DC operation while only providing power to memory for Standby/Sleep modes of operation. Electrically specified AC Wall adapter requirements. Helped develop 3 patents in which Apple is actively using 2 in patent disputes.
Analog Systems Engineer
Diasonics Ultrasound (GE medical)
March 1990 – September 1991 (1 year 7 months)
Ultrasound Imaging Systems. Design multilayer impedance controlled VME computer backplanes that supported mixed signals. Implemented a 1.2KW power factor corrected power supply that met worldwide medical and safety requirements (UL544/IEC601). Evaluated products for EMI compliance in both physical design and testing. Drove product safety compliance to meet UL Safety Standards.
Lead Power System Engineer
Rugged Digital Systems Inc (Datametrics Corp)
September 1987 – March 1990 (2 years 7 months)
Military Ruggedized Computer Systems Manufacture. Designed 5W to 1.5KW AC power supplies with the high power versions using DC-DC resonant modules. Designs included power monitoring. fault protection and power control circuits. Everything had to operated over a 0-50C operating range while meeting full Mil-Spec electrical and mechanical standards.
Manufacturing Analog Test Engineer
Rolm Mil Spec Computers (Loral)
April 1984 – September 1987 (3 years 6 months)
Mil-Spec Computer Manufacture. Provide analog sustaining support and implement test production tools for production of full Mil-Spec power supplies. Trouble shoot down to component level and reviewed with design engineering failure modes and design changes to improve reliability. Design test fixtures to test the various kW level DC input and AC input switching power supplies that had as many as 8 output voltages. Unique power applications were supporting Nuclear EMP pulse applications where the computer had to shutdown fast along with shorting (crow-baring) all supply rails to make the effect of the externally induced current flow from the pulse become common mode to the computer itself. This protects the computer from damage making survivability possible. Involved in support of memory test and debug of modular memory arrays used in the computers. Although DRAM was one of classes of memory, most of the work was involved in Core Memory support which has an intense mixed signal design aspect to it basic operation. (See Schmoo Plots on wikipedia.) Everything has to work over a -55C to a +95C temperature range while passing memory test used to detect bit error defects that show up in the core memory media (medium) itself.
Mark Gurries's Publications
With the backing of Intel and Microsoft, Smart Batteries have become the dominant battery pack solution for products that require an accurate gas gauge to predict battery life. The Smart Battery System (SBS) has simplified the design of standalone battery systems so much that it is showing up in applications outside its usual realm of notebook computers.
Power over Ethernet (PoE) is a new development that allows for the delivery of power to Ethernet-based devices via standard Ethernet CAT5 cable, precluding the need for wall adapters or other external power sources. The PoE specifications sets an upper limit on the power that can be drawn by the product. The problem is: what happens when a product must draw more power than allowed by the PoE... href="http://www.linkedin.com/redir/redirect?url=http%3A%2F%2Fcds%2Elinear%2Ecom%2Fdocs%2FDesign%2520Note%2Fdn393f%2Epdf&urlhash=lXm5" target="_blank">Handheld High Power Battery Charger Design Note 393
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- Linear Technology
- July 2006
Authors: href="http://www.linkedin.com/redir/redirect?url=http%3A%2F%2Fcds%2Elinear%2Ecom%2Fdocs%2FDesign%2520Note%2Fdn277f%2Epdf&urlhash=Z-R2" target="_blank">Dual Battery Power Manager Increases Run Time by 12% and Cuts Charge Time in Half – Design Note 277
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- Linear Technology
- February 2002
Many modern CPUs run at two different clock speeds, where each speed requires a different core operating voltage to assure optimum performance. Some new DC/DC converters (the LTC®1909, for example) have built-in VID control that supports dual programmable output voltages, but many existing converters do not.
Li-Ion batteries are normally charged with a current limited constant voltage for a fixed length of time. At the end of this time period, the voltage must be removed to prevent internal chemistry changes in the battery. At a minimum, a timer is needed to terminate the charging process after the maximum amount of time required to fully charge the battery. However, if the battery is never fully... href="http://www.linkedin.com/redir/redirect?url=http%3A%2F%2Fwww%2Eedn%2Ecom%2Farticle%2F490782-02_16_98_Table_of_Content%2Ephp&urlhash=iGpD" target="_blank">Reap benefits while simplifying dual-battery portable power management.
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- EDN
- February 16, 1998
Authors: href="http://www.linkedin.com/redir/redirect?url=http%3A%2F%2Fcds%2Elinear%2Ecom%2Fdocs%2FDesign%2520Note%2Fdn193f%2Epdf&urlhash=o6Qy" target="_blank">SMBus Accelerator Improves Data Integrity – Design Note 193
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- Linear Technology
- November 1998
The predominant design challenge in most single-battery applications, such as tablet PCs and portable instrumentation, is how to save space.
Constant-Voltage/Constant-Current Battery Charger Is DAC-Controlled.
-
- Electronic Design
- October 28, 1999
Authors: href="http://www.linkedin.com/redir/redirect?url=http%3A%2F%2Fcom-linear-www-2s%2Ewwwa%2Ecom%2Fltmagazine%2FLTMag_V09N4_Nov99%2Epdf&urlhash=ja8V" target="_blank">Smart Battery Charger Is Programmed via the SMBus
-
- Linear Technology
- November 1999
-
Muting of Computer Sound System During Power Cycling
- United States Patent 5,424,678
- Issued June 13, 1995
Inventors:
href="http://www.linkedin.com/pub/mark-gurries/27/100/84b">Mark Gurries, Andrew Hardagon, Steve Young, Kihachiro Tonomura, Markus Wallgren
A complete uP based battery charger system that can charge the main battery located in the host notebook while working with 2 batteries located in a plug in accessory device which has its own uP and battery charger. Power management software and hardware sets both priority and charging rates that can vary depending on the notebook being on or off, number of batteries involved, the condition of a... href="http://www.linkedin.com/pub/mark-gurries/27/100/84b">Mark Gurries, James Blanc
A method and apparatus of using a uP PWM output to program the battery chargers output voltage.
Mark Gurries's Education
Santa Clara University
BSEE, Electrical Engineering
1979 – 1984
Hewlett Packard Corporation
EMI design Course by HP 11949A
Course no longer offered but here is a independent web link showing it existed. http://www.testequipmentconnection.net/Test-Equipment-Detail.asp?model=11949A
11 Recommendations
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