IEEE - CAS Bangalore Chapter, India     CAS Chapter - Region 10
Institute of Electrical and Electronics Engineers - Circuits and Systems Society
Goals: To conduct seminars, workshops, and other events pertaining to all aspects of electronic circuits and systems

Event Reports - 2015
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December
A Two-day Wikipedia Editathon (Topic - Science and Technology)
December 19-20, 2015
Texas Instruments India, Bangalore Campus
Report by C.P.Ravikumar

wikiedit-dec15 A Two-day Wikipedia Editathon was organized by Wikipedia Association, in cooperation with Texas Instruments India, IEEE CAS Bangalore Chapter and IEEE Bangalore section on December 19-20, 2015 at Texas Instruments, Bangalore campus.

The purpose of the workshop was held in conjuntion with the 13th Kannada Wikipedia anniversary. The aim was to enable interested participants write technical articles in Kannada on selected subjects under science and information technology, and add it to Wikipedia. New comers had an opportunity to get trained on writing by an experienced panel in the respective fields.

We had around 16 participants including some IEEE members. Please visit https://kn.wikipedia.org/s/1e9s for a detailed charting of the event and participants right from its inception.

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A Seminar entitled Heterogeneous NEMS-CMOS based Power Management Circuits for Improved Area and Enhanced Power Efficiency
December 10, 2015
Texas Instruments India, Bangalore Campus
Report by C.P.Ravikumar

nems-dec15 A Seminar entitled Heterogeneous NEMS-CMOS based Power Management Circuits for Improved Area and Enhanced Power Efficiency was conducted by PragaTI (TI India Technical University), in association with IEEE CAS Bangalore Chapter and IEEE Bangalore Section on December 10, 2015 at Texas Instruments, Bangalore campus.

Dr. Sujan Manohar, Texas Instruments, Dallas delivered the talk that explored the usage of NEM relays in on-chip power management circuits, in the design of efficient charge pump and NEMS-CMOS hybrid dc–dc converter for low power applications.

The talk analyzed the zero leakage operation of Nanoelectromechanical (NEM) relays that make the device a promising candidate among emerging devices. Since in CMOS switches, the input signal modulates the on-channel resistance for a constant gate voltage, it necessitates over design of CMOS switches. The speaker noticed that CMOS scaling in the nanometer regime has failed to improve energy efficiency due to increasing leakage energy. Hence, an approach that looks beyond CMOS, nanoelectromechanical (NEM) relays were projected as a promising class of emerging devices that exhibit energy-efficient switching and zero leakage operation.

The speaker emphasized that as Ron of the NEM relay switch is constant and is insensitive to the gate slew rate, it creates a paradigm shift in design of power switches. He observed that this coupled with infinite Roff offers significant area and power advantages over CMOS. He also noted that numerous end applications of NEM relay logic circuits proposed recently, including digital logic and memory. NEMS-based miniature switches form an interesting alternative in power management integrated circuits, the area of which is primarily dominated by CMOS power transistors.

We had around 15 participants including some IEEE members.

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A One-day Workshop entitled Aspects of Analog and RF Test
31 October, 2015
Texas Instruments India, Bangalore Campus
Report by C.P.Ravikumar

analog-oct15 A One-day Workshop entitled Aspects of Analog and RF Test was organized by PragaTI (TI India Technical University) in cooperation with IEEE-CAS Bangalore Chapter on October 31, 2015 at Texas Instruments, Bangalore campus.

The workshop aimed to cover the aspects of Analog, RF and mixed-signal blocks are increasingly getting integrated into modern-day SoC, considering that while it is undisputed that designing high-speed, low-power and high-precision analog/RF/mixed-signal circuits is a challenge, post-manufacturing test and qualification of these blocks presents an equally big challenge.

The five speakers, all from Texas Instruments India, included Sharat Chandra, Sankar Sadasivam, Harikrishna Parthasarathy, Rittu Sachedev and Anil Kumar

Anil Kumar delivered the opening talk and provided an overview of the challenges in the "Validation and Testing of Analog/RF circuits". Sharat Chandra's talk was on "Testing of Data Converters", and Sankar Sadasivam's lecture focused on "System-level aspects of Analog / RF Test". Harikrishna Parthasarathy covered an "Introduction to Testing of RF SoC" anf Rittu Sachedev talked about "Test aspects of RF Design".

We had 30 plus participants with all being IEEE members. There was a lot of interaction during the presentations and the workshop was highly appreciated by all the participants.

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A One-day workshop/conference on: Kannada Science/Technology writers - 2015

Texas Instruments India, Bangalore Campus
Report by C.P.Ravikumar

knsciworkshop-may15 A one-day Conference/workshop entitled Kannada Science/Technology writers - 2015 was organized by Texas Instruments India, and co-sponsored by IEEE Bangalore Section on 16 May, 2015 at Texas Instruments, Bangalore campus. The workshop's intent was to increase the number of writings in Kannada on science and technology as both these are growing day-by-day.

With a wide range of tools and mediums available in the present day, specially digitally, apart from hard-print, in the form of blogs, Encyclopedias, Wikipedia, textbooks, e-books, science magazines, science-based articles in popular dailies and magazines, scienctific novels etc. the workshop aimed at increasing contributions through exploiting these features to reach the masses effectively.

The workshop organizers included Dr.C.P.Ravikumar, Dr.U.B.Pavanaja, Sri.T.G.Srinidhi, Sri.Sudheendra Haldodderi and Sri.Ravikiran A., who are well-known figures in the field, contributing regularly in popular dailies and magazines. The pre-lunch session had presentations by these speakers. The afternoon session carried an on-the-spot essay writing and presentations by the participants. The event concluded successfully with a panel discussion.

The workshop was open to all, with priority to those already contributing to the field, and there were around 30 participants including some IEEE members.

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A seminar to mark Earth Day 2015: Trace Element Contamination of Environment
April 22, 2015
Texas Instruments India, Bangalore Campus
Report by C.P.Ravikumar

Trace Element Contamination of Environment A seminar entitled Trace Element Contamination of Environment was organized by PragaTI (TI India Technical University) in cooperation with IEEE-CAS Bangalore Chapter on April 22, 2015 at Texas Instruments, Bangalore campus. Dr. J R MUDAKAVI, a Chief Research Scientist at the Department of Chemical Engineering, Indian Institute of Science, whose major interests lie in environmental pollution control and determination of trace and ultra-trace metal ions and organics in environmental samples was the invited speaker

The seminar was to mark the Earth Day 2015, and Dr. Mudakavi's talk focused on the effects of population explosion, the consequent exploitation of natural resources, exhaustion of fossil fuels & other important mineral resources. He highlighted the ill effects of unscientific dispersion of metallic elements from industrial and municipal wastes into soil and water that causes metal corrosion, leaching and irregular adsorption on the soil particles causing persistent ecological and physiological problems, and more importantly the way it affects vegetation and other marine life forms, ultimately leading to human consumption.

The environmental pollution by inorganic metal ions as he noted may turn out to be more serious than any other kind of pollution, and the seriousness of the situation that can be gauged by the facts that lead and arsenic have already become part of human physiology even though they do not have any physiological role in the biochemistry of man. Activated carbon as he mentioned has been found to be very effective in tackling the trace metal contamination, especially at the process level or as a final polishing operation. Some success stories of special treatment of activated carbon in the form of granules, as fabric, or as nanomaterial to achieve 99.99% removal were illustrated that circumvent the situation to an extent.

We had around 16 participants including some IEEE members.

I N D E X   T O P March
Seminar on Control and Design of Power Converters for Renewable Energy System
March 25, 2015
Texas Instruments India, Bangalore Campus
Report by C.P.Ravikumar

Control and Design of Power Converters for Renewable Energy System A seminar entitled Control and Design of Power Converters for Renewable Energy System was organized by PragaTI (TI India Technical University) in cooperation with IEEE-CAS Bangalore Chapter on March 25, 2015 at Texas Instruments, Bangalore campus. Abhijit Kulkarni (IISc Bangalore) conducted the seminar that focused on Power converters which form the interface between the electric source and the grid or load.

His talk described two power converter topologies for renewable energy systems such as photovoltaic (PV) system, proposing novel methods against the normal and highlighted their advantages.

As he observed, for low power rating of less than 1kW, line-frequency transformer interfaced inverter topology is considered and this injects low-order harmonics to the grid, which is undesirable. A novel control method using adaptive harmonic compensation technique and a proportional-resonant-integral (PRI) controller was proposed that has been validated.

For a power rating of few kilowatts upto 10kW, a compact high-frequency transformer interfaced inverter topology was suggested. A lossless snubber and a modulation scheme was proposed and validated on a laboratory prototype which eliminates overvoltage spikes due to transformer leakage inductance and results in efficiency improvement.

The talk also focused on the phase-locked loops (PLLs) that are used for grid synchronization of the power converters. The proposed design were shown to ensure the control references generated using the PLLs having minimal distortion and DC offsets to satisfy grid interconnection standards such as IEEE 1547-2003.

There were around 15 participants including some IEEE members.

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January
Three-day Workshop on Embedded Linux and Android on Beaglebone Black
January 10-12, 2015
Texas Instruments India, Bangalore Campus
Report by C.P.Ravikumar

Embedded Linux and Android on Beaglebone Black A three-day workshop on Embedded Linux and Android on Beaglebone Black was organized by IEEE-CAS Bangalore Chapter in cooperation with Texas Instruments and IEEE Bangalore Section during January 10-12, 2015. The venue of the workshop was the office of Texas Instruments, Bangalore. About 40 participants took part in the workshop.

Beaglebone Black is a single-board computer based on AM335x 1GHz ARM® Cortex-A8 processor from Texas Instruments and is capable of running operating systems such as Linux. The workshop was intended for professionals, teachers and students who wish to use the Beaglebone BlackBeaglebone Black in Do-it-Yourself projects.

Several industry professionals were part of the team that conducted the workshop - C.P. Ravikumar, Anant Gole, Vaibhav Hiremath and Kishon Vijay Abraham (Texas Instruments), Mohammed Asif Nalband and K Aravindhan (Starcom Information Technology), Vishwa Kiran (Pushkala Technologies), and C. Krishna (CDAC Bangalore). This is the second such workshop which has been held by IEEE CAS, the earlier one was held in November 2013. In order to ensure that participants had the right background, a tutorial on "Introduction to Unix Shell" was offered to the participants on December 27, 2014.

Day 1 of the workshop focused on "Starting with Beaglebone Black." On Day 2, the focus was on "Embedded Linux on Beaglebone Black." Day 3 was dedicated to "Android on Beaglebone Black.” An introductory and a valedictory session were also held.

The response to the workshop was highly encouraging. We selected 40 participants from varying backgrounds, mostly industry professionals interested in DIY. About 50% of the participants were IEEE members. The workshop elicited enthusiastic feedback from the participants. The participants appreciated the knowledge of the instructors and their willingness to share the knowledge in a manner that a beginner can understand. The hands-on lab sessions received much praise from the participants. Most participants appreciated the balance of theory and hands-on and found the workshop well organized, aided by demo, and liked the correlation with Beagleboard. Android porting and Developing Android apps was of significant interest to the participants. They found the environment friendly and conducive for learning. The participants also had suggestions to include sessions about other modules such as PRU, DSP, and file systems. Many participants wished for a longer workshop with more lab time.

IEEE CAS Bangalore chapter thanks all the instructors and members of the organizing committee who helped in putting this event together. Please watch our event calendar for the announcement of our future workshops.

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