Resume of
Dewan Tarik Mahmud
(Canadian Citizen)
Address & Contacts 240 Natoma Station Drive
Apt # 274, Folsom, CA 95630 Telephone No (780) 436-9548
Email: mahmud@ee.ualberta.ca

Ambition
Research and Development in Analog/RF CMOS Circuits, Signal Integrity, Broadband Network, Hardware and software. Availability: Immediately.

Educational Qualification Master of Electrical and Computer Engineering from University of Alberta. Nov. 2001
Bachelor of Science in Electrical & Electronic Engineering from Bangladesh University of Engineering & Technology, placed in the First Class. 1992.

Chronicle
From 2002 Became part-time student and did the following projects in Analog/RF/Digital Circuits:
1. RF CMOS Circuit Design: Low power, high frequency, complementary double-folded, wide common mode input range, almost rail-to-rail, cascode operational amplifier design and simulation in Cadence Composer, Spectre.

2. Design CMOS Analog Integrated Circuits: Inverter Layout Design and post-layout simulation, in order to know how to use Cadence CAD tools efficiently in IC design. Layout, Extraction, LVS, DRC using Virtuoso / Diva / Analog Artist in Cadence.

3. Digital Integrated Circuit Design: This is a joint project with a French University. A group of communication students developed a Verilog program for Gaussian noisy channel. We designed the chip with Cadence Digital Logic Design Flow tools. The chip emulates a Gaussian noisy channel – any signal at the input appears Gaussian noise distorted at the output.

4. Advanced Digital Logic Design: Implementation of a small microprocessor on a FPGA board using VHDL programming in Altera Max Plus II CAD Tools. VHDL programs for different components inside a microprocessor are written and simulated in Max Plus ll. Then machine coded processor file is loaded on FPGA board to implement the processor.

5. RF Communication Circuits: In this project different components of a short wave receiver set, RF Amplifier, Mixer, IF Amplifier, Detector and Audio Amplifier, are designed, implemented on a bread-board and tested.
From 2004 to date Started research at the University of Alberta under supervisor professor, on RF CMOS analog circuits, have covered the complete cycle of CMOS chip development: from simulations, signing off for fabrication to after fabrication tests; have developed expertise on Op-Amp design with current mirror bias. Done simulation of VCO, LNA, Mixer and Signal Integrity. Recently got notes from a senior IC design consultant in San Jose and got the hang of TX/RX architecture, Filter, DAC/ADC, Comparator, Power supplies, Band-gap reference, Peak detector, Zero crossing detector, Rectifiers, PLL.
Research Result

Operational Amplifier: In this paper a high frequency, CMOS operational amplifier, for monolithic mixed signal application is presented. High unity gain frequency is achieved by employing telescopic main amplifier and gain is increased by making use of only one parallel booster auxiliary amplifier, placing it in a non-negative loop, and two pole-zero doublet cancellation capacitors, thus saving power and die area. Simulations show a unity gain bandwidth of 3 GHz with a load capacitance of 1pF. DC gain of 45 dB, Common Mode Rejection Ratio (CMRR) of 46 dB and phase margin of 80° are obtained. The main impediment to CMRR is the harmonic distortion produced by inherent non-linear behavior of CMOS transistors and odd transfer-function of an op-amp. It exhibits differential output peak to peak voltage swing of 2.6 V from a 3.3 V power supply. Total power consumption is about 14 mW. Layout has been designed for 0.18 µm CMOS technology with Cadence and Mentor Graphics CAD Tools.
From 2002 to date Part-time work: electronic product safety certification, for QPS Inc. Writing technical reports on compliance of electronic equipments with the national standards. Products are certified according to CSA standards as safe for Class 1, 2 & 3 and Division 1 & 2.

Other Projects

1. Digital Filter Design & Implementation: Used Matlab Signal Processing Environment and Motorola DSP56002EVM Microprocessor board and Graphical User Interface (GUI) for System Response Characteristics of a First-Order / Second-Order Recursive Digital Filter. Design and Microprocessor Implementation of a Two-Way Digital Crossover System, Multi-band Stereo Digital Graphic Equalizer, Digital Frequency Synthesizer. Writing Matlab code for different filter transfer functions, such as Chebyshev, Butterworth, elliptical and plotting the Magnitude-Frequency-Response of the filters.

2. Digital Signal Processing: A Comprehensive paper review to show how Discrete Cosine Transform (DCT) is superior to Discrete Fourier Transform (DFT), using matrix and why it is used in many popular image compression techniques, e.g., JPEG and MPEG.

3. Error Control Coding: Simulation of channel coding using C programming, to make channel encoder, channel and decoder simulators according to the Trellis and State diagram. Cyclic code is used because of its easy implementation and faster decoding. The encoder takes an input stream of ones and zeros of source coded signal. After encoding, bits are randomly changed, in order to simulate channel noise. Then the decoder decodes the distorted stream and compares with the original signal.

4. Broadband Integrated Services Digital Network (B-ISDN) Design and Optimization: B-ISDN is expected to integrate all the diverse types of services, namely voice, audio, video, image, and data services on the same network. All these applications differ widely in their nature of bit generation. Consequently, stochastic nature of parameters is becoming an important issue. This project deals with this kind of stochastic parameters. Stochastic programming (SP), namely wait-and-see (WS), methodology is exploited and simulation results are presented. Nonlinear model is also presented and discussed.

5. Digital Image Processing: A computational approach to edge detection in an image, for good detection and good localization. Edge pixels, bathed in white Gaussian noise, are convolved with filter functions, whose impulse responses we know. Centre of an edge is marked at a local maximum in the output of the convolution. First derivative of Gaussian operator is applied to the edge to get only one response to a single edge.

6. BISDN Network Design & Optimization: Utilization of super restorability in networks by modified Dikstra algorithm. Even in optimal design there are spans in a network on which traffic load can be increased without any impact on the spare capacity design. In this project C programs are written to route new demands in a manner such that the fewest total new links are added to the network to both provision the new service path and make it fully restorable on all spans en-route.

7. Design & Realization of Large Circular Loop Antenna.

Past Work

From2000 to 2001 Research Assistant
Optimization of Broadband Integrated Services Digital Network (BISDN.)
Asst. Prof. Dr. Xian Liu
Department of Electrical and Computer Engineering
University of Alberta
From 1997 to 1998 Worked for ATV satellite television, for about one year. Worked on cable TV network design.
From 1992 to 1997 Worked in industrial project planning, setting-up to manufacturing of products & cost estimation; had supervisor’s licence. Team leader of a sub-group of four electrical engineers

Training & Certificates

• On after-fabrication test equipments, namely, Oven for testing Die under worst case temperature, On wafer testing (Giga-test probing), HP 8753D VNA, SA, with Application Notes from Agilent Technologies.
• Electronics: Theory, Practice and Manufacturing of consumer electronic goods.
• Industrial Power & Electrification
Courses & Grades

1. EE633 Design CMOS Analog Integrated Circuits. 9
2. EE681 BISDN Network Design & Optimization. 8
3. EE588 Communication In Noise. 8
4. EE539 Digital Filter Design & Implementation. 8
5. EE601 Digital Signal Processing. 8
6. EE601 Digital Image Processing. 8
7. EE685 Data Communication & Computer Networks. 7
8. EE601 Error Control Coding. 6
9. EE586 Introduction to Optical Fiber Communications 6
10. EE589 Telecommunication Systems Engineering 6
11. EE635 Advanced Digital Logic Design. 6
12. EE550 Design with Operational Amplifiers. 7
13. EE571 RF Communication Circuits. 6
14. EE653 Digital Integrated Circuit Design. 6
15. EE671 RF CMOS Circuit Design. A+(9) (Note: This course was taken from the supervisor professor, without officially registering.)
Programming & Soft-wares used

• C
• Matlab
• VHDL in AlteraMax Plus ll CAD tool
• Cadence Custom IC Design tools
• Visio Technical
• LPSolve
• Ampl
• PSPICE9.1
• IntelliCAD • LabVIEW 8.2
• Adobe FrameMaker
• Adobe Photoshop
• EAGLE PCB 4.16
• Ansoft’s Maxwell 2D Extractor Field Solver 9.0
• Mentor Graphics' HyperLynx 7.5 EXT and GHz high-speed design tools, signal-integrity, crosstalk, EMC

Self study

• “Signal Integrity – Simplified” by Eric Bogatin.
• “Taking Charge of Your VoIP Project” by John Q. Walker from Cisco press. This is the text book for Cisco VoIP certification course. Did some research on VoIP.
• “Hazardous Locations–Guide for the Design, Testing, Construction, and Installation of Equipment in Explosive Atmospheres” by John A. Bossert from Canadian Standards Association.
• “Law for Professional Engineers” by D.L. Marston.
• “Canadian Professional Engineering Practice and Ethics” by G.C. Andrews and J.D. Kemper.


References
1 Dr. Igor Filanovsky
Professor, Department of Electrical and Computer Engineering
University of Alberta
Tel: (780) 492-3904
Email: igor@ee.ualberta.ca
2 Ahmed Allam
Instructor of RF Circuit Design & Implementation
Department of Electrical and Computer Engineering
Electrical and Computer Engineering Research Facility (ECERF)
University of Alberta
Edmonton, Alberta, Canada, T6G 2V4
Phone:780.492.3332
University of Alberta
allam@ece.ualberta.ca
3 Bill Stephenson
Engineering Manager
EXPLOSION RESEARCH LTD / QPS
9410-95 Street Edmonton, AB Canada
T6C 3X3
stephenson@explosionresearch.com
Phone: 780 905-9601

Signature: Dewan Tarik Mahmud Date: March 22, 2007