ashfaqur_rahman_resume

ASHFAQUR RAHMAN axr029@email.uark.edu, (240) – 246 6425

705 Putman St. Apt A3, Fayetteville, AR 72701

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OBJECTIVE Seeking Full time employment as a Design and System Engineer in Power Management and

Control

EDUCATION Ph.D. in Electrical Engineering (Analog and Mixed Signal IC Design)

University of Arkansas, Fayetteville, AR

August 2015

GPA: 4.00

Topic: Design of an Integrated SiC Controller for a DC-DC Flyback Converter in a Microinverter

B.S. in Electrical and Electronic Engineering Bangladesh University of Engineering And Technology, Dhaka, Bangladesh

January 2008 GPA: 3.79

Rank: 14/139

INTEREST

High Efficiency system design

Control and protection of signal interface and power applications

Power Management for High Temperature Applications

High Voltage and Harsh Environment Electronics

RELATED

COURSES

Analog Circuit Design

Introduction to IC Design IC Design Lab I & II

Mixed Signal Testing

Signals and Systems

Power Electronics

IC Fabrication Processes and Techniques Semiconductor Devices

Mixed Signal Modeling and Simulation

Microelectronics Fabrication Techniques and Procedures

RESEARCH

AND DESIGN

EXPERIENCE

Mixed Signal Controller and Gate Driver for a microinverter in BiCMOS Si (2014 - )

The purpose of the project is to provide a 3 chip (gate driver, power supply, mixed signal

sense and control) solution for a 300 W microinverter board in collaboration with Sinewatts

Inc. and Ozark IC Inc. The chips are being designed in the 0.18 µm Dongbu BiCMOS high voltage process.

Project task leader and interface with foundry technical staff

Chip architect of the mixed signal chip and chip integrator for the gate driver chip

Design of mixed signal chip sensors and conditioning circuitry for feedback control

Design Voltage and Current References, Operational Amplifiers and Filters

Design of mixed signal communication block to communicate over power lines

Development of behavioral models in and verifying Si design in Cadence

Providing design support to the gate driver and power supply chip

Consult on package selection and board design with partnering entities.

Fully Analog Controller and Mixed-Signal Interface for Digital Controller in CMOS

SiC (2012 - ) The purpose of the project is to develop an on-chip controller for a Flyback DC-DC converter

that uses Sliding Mode control. Analog and Digital controllers were developed. The circuits

and systems were designed in the 1.2 µm Raytheon HiTSiC CMOS process.

Design of an all Analog Sliding Mode Controller for a DC-DC converter

Design of an 8 bit SAR ADC and 8 bit R-2R DAC

Design of mathematical circuits in SiC for signal conditioning and control.

Design of mixed signal interface to digital controller

High Temperature Analog and Mixed Signal Circuits on SiC CMOS for operation at

300⁰C (2012 - )

The purpose of the project is to develop high temperature analog and mixed signal parts in a

1.2 µm Raytheon HiTSiC CMOS process for high temperature and gate driver applications.

The project was done in collaboration with two Ozark IC Inc., APEI Inc. and Raytheon UK.

Design and maintain a new Process Design Kit for a SiC CMOS process

Design PCELLs for devices and develop DRC and LVS rules for design verification

Design of the first SiC Voltage and Current References. These include -

PTAT current, Constant current sources and Diode based Bandgap Reference

Design of Voltage and Current Comparators and Operational Amplifiers

Chip Integrator of two 21 mm X 12 mm SiC chips with over 100 circuits.

Bonding and packaging of circuits for high temperature testing

Extensive probe testing of parts on Semiprobe probe station.

Design of a Linear Voltage Regulator in all-NMOS SiC (2011 – 2012)

The purpose of the project was to design a linear regulator for a 20 V nominal supply and a 15 V output in a 2 µm all-NMOS Cree SiC.

Participation in design of error amplifiers and feedback network

Small signal model development for frequency response and stability assessment

Layout optimization with one metal of routing layer availability.

Design of Wireless Sensor Networks Project (2009 -2011)

The purpose of the project was to design components a wireless sensor network in a 0.13 µm IBM CMOS process for RF design.

Design of low Power Fully Differential Amplifier, Switched Capacitor Filter.

Participation in the design of a Wireless Sensor Node including Mixer, PLL, LNA,

Power Amplifier, Variable Gain Amplifier.

Design Support for Electronics 2 instruction lab (2012 -2015)

The purpose of the work is to provide instruction and support the design and testing of IC circuits for Electronics 2 students in their junior year in 0.5 µm ON Semi CMOS process.

Develop instruction manuals for IC design and Cadence tools for undergraduates.

Design and verify building block analog circuits like OpAmps and references

Integrate circuits from over 15 groups each run and send for fabrication

Package parts and design test boards for circuit verification.

Design Co-Op at Texas Instruments Inc. (2011, 2012)

The design co-op included designing in the LBC5 and LBC7 process at TI.

Design a One Time Programmable (OTP) memory array

Participate in the design of curvature compensated bandgap voltage reference

Design of a 10 bit SAR ADC with a decoder based DAC

Design signal conditioning circuits and input interface for the ADC

Design offset compensated voltage buffer for DAC input

Test bench testing for latch up conditions on chip

EMPLOYMENT

HISTORY

Returning Design Co-Op, Power Management Group

Texas Instruments, Dallas, TX

Graduate Research Assistant, MSCAD Lab University of Arkansas, Fayetteville, AR

Design Co-Op, Power Management Group

Texas Instruments, Dallas, TX Lecturer, Department of Electrical and Computer Engg.

Presidency University, Dhaka, Bangladesh

Services Engineer, RAN Implementation

LM Ericsson Bangladesh Ltd., Dhaka, Bangladesh

May 2012 – August 2012

August 2009 – present

January 2011 – May 2011

June 2008 – July 2009

January 2008 – May 2008

SKILLS Software Tools: Cadence, Matlab, Simulink, Mentor Graphics, Modlyng, PSpice Simulation Tools: HSpice, Spectre, Spice

Languages: Verilog, C/C++

ACADEMIC

HONORS

Dean’s list of honors, Faculty of EEE, BUET (8 semesters) University Merit Scholarship (Top 15% GPA), BUET (6 semesters)

2003 – 2007 2003 - 2007

AWARDS AND

LEADERSHIP

Distinguished Doctoral Fellowship, University of Arkansas Award for Excellence, Notre Dame College, Dhaka, Bangladesh

Student Coordinator, ‘Save Bhobodoho’ movement by Dristipat

President, Bangladesh Student Organization, University of Arkansas

2009 – 2014 2002

2007

2010-2012

PUBLICATIONS 1. J.A. Valle-Mayorga, A. Rahman, H.A. Mantooth, "A SiC NMOS Linear Voltage Regulator

for High-Temperature Applications," Power Electronics, IEEE Transactions on , vol.29,

no.5, pp.2321,2328, May 2014.

2. A. Rahman, A.M Francis, S.A. Bhuyan, et. al., “A Family of CMOS Analog and Mixed Signal Circuits in SiC for High Temperature Electronics,” 2015 IEEE Aerospace Conference,

Big Sky, MT, Mar 2015.

3. A. M. Francis, J. A. Holmes, A. Rahman, et. al., “Towards Standard Component Parts in Silicon Carbide,” 2015 IEEE Aerospace Conference, Big Sky, MT, Mar 2015.

4. N. Kuhns, L. Caley, A. Rahman, et. al., “High Temperature Testing Reulsts of Synchronous

and Asynchronous Digital Silicon Carbide Integrated Circuits,” GOMAC 2015, St. Louis, MO, Mar 2015.

5. P. Shepherd, A. Rahman, S. Ahmed, A.M. Francis, J. A. Holmes, H.A. Mantooth,“500 kHz

– 5 MHz Phase-Locked Loops in High-Temperature Silicon Carbide CMOS,” High

Temperature Electronics Conference 2014, Albuqurque, NM, 13-15 May, 2014. 6. L. Caley, N. Kuhns, W.S. Bowen, P. Shepherd, A. Rahman, et. al., “Delay-Insensitive

Asynchronous Silicon Carbide Integrated Circuit Design for High-Temperature

Applications,” GOMAC 2014, Charleston, NC, 31 Mar – 3 Apr, 2014. 7. A.M. Francis, J.A. Holmes, A. Rahman, et. al., “Design of Analog and Mixed-Signal

Integrated SiC CMOS Circuits with a High Fidelity Process Design Kit,” GOMAC 2014,

Charleston, NC, 31 Mar – 3 Apr, 2014. 8. J. A. Valle-Mayorga, A. Rahman, H. A. Mantooth, "Back to the Future: An All-NMOS SiC

Linear Voltage Regulator for High Temperature Applications," Compound Semiconductor

Integrated Circuit Symposium (CSICS), 2012 IEEE , vol., no., pp.1,4, 14-17 Oct. 2012.

REFERNCES Available upon Request