Ashok's other projects

Bachelor degree project:

Dual SHARC based multiprocessor DSP platform

            This project involved the design of a low cost, standalone, scalable Multi Processor DSP platform using two Analog Device's high performance 32-bit Floating Point SHARC DSPs.  To allow a scalable architecture and augment the number of processors, a SHARCPAC module interface was provided.

            The majority of the project time was dedicated to

            1) Circuit design involving signal integrity and timing analysis,
            2) PCB layout (5 layers with 3 routing layers and two power planes)
            3) Mounting the compnents and testing
            4) Writing boot code to boot the processors
            5) Writing simple appliactions to run in parallel at the 2 processors.

The scanned version of the layout of the board.
Table of contents

                
                 Me with dual SHARC based multiprocessor DSP platform (2000)

Master's thesis Project:

Radio Over Mulitmode Fiber using VCSELs - Table of contents

             The aim of this research project is to address the transmission of RF signals like UWB or Wireless LAN signals over cheaper Multimode fiber (MMF) links which are evolving along with the Gigabit / 10G Ethernet standards. These MMF links are based on 850nm VCSEL laser diodes and Laser optimized Graded Index fibers and is meant for short distances up to 300 to 550 meters for 10Gbps data rate.


Other projects:

1) Involved in the design of a low cost 30 GHz millimeter wave source. It was designed in two parts. - A 15 GHz GAASFET oscillator based on a Surface integrated waveguide resonator and 2) a 15/30 GHz GAASFET frequency doubler. The entire design was to be realized in a PCB process.

2) Involved in the design of a Static memory controller core for AMBA AHB bus environment, which would support memories like SRAM, Flash EPROM, ROM, Burst ROM.  This project was done in Wipro Technologies.

3) Involved in the design of  a video conferencing board based on Analog Device's Blackfin DSP.  This project was done in Wipro Technologies.

4) Designed an ADSP -2105 DSP based demo board for design project course during the 6th semester (1999) of Bachelor degree.

5) Designed a EXAR-8038 based 20 kHz low cost function generator for our department lab during the 5th Semester(1999) of Bachelor degree.

6) Designed a 8031 micro controller based driver card for a Epson hand held printer for Signals and Systems, Chennai during 1998 summer holidays.

7) Designed  a 2.4GHz 5th order Chebyshev Band Pass Filter board based on coupled Microstrip lines  for RF Circuit design I course project in 2003 (report).

8) Designed a 2.4GHz Low Noise Amplifier board based on Fujitsu FHX35LG HEMT transistor for RF Circuit design I course project in 2003 (report).

9) Designed a Double balanced Diode mixer based on Agilent's quad diode ring 5082-2830.  This involved the design of a 180 degree Balun(Rat Race Balun) for frequencies 2.1 GHz and 1.8 GHz.  Also it involved the design of a 600 MHz 3rd order Chebyshev Low Pass Filter based on Microstrip lines. (report).

                           
                            Me with Blackfin DSP videoconferencing board (2002)