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Integrated Circuits for Optical Wireless Communications
Wireless links based on optical transmission are emerging as a viable technology for their
potential to overcome the communication bandwidth bottleneck between high-speed fiber backbone
networks and the end user. Optical transmission offers several advantages over conventional
radio frequency (RF) wireless systems in terms of connection speed, power efficiency, networking
security, and unregulated bandwidths in the THz range. Our research work addresses the challenges
of designing broadband integrated circuits for such systems in advanced, mainstream silicon
technologies that achieve a high level of sensitivity, wide dynamic range, and high gain with
minimal power dissipation. We are currently working in the following research areas:
- Low-noise, front-end circuit topologies for wide field-of-view optical receivers using
distributed amplifiers.
- The design of imaging diversity receiver circuit architectures in CMOS to enable signal
tracking, point to multi-point reception, and enhance mobility in line-of-sight optical wireless
links.
- A study of the characteristics of emerging nanoscale devices (finFETs, 1D structures,
molecular transistors) and the implementation of these devices in future low-noise, high-speed
circuits for optical communications. (In collaboration with Prof. Sonkusale, Tufts Nanoscale
Circuits and Systems Lab)
Current Projects:
CMOS Receivers for Optical Wireless Communications
Mixed-Signal Neuromorphic Integrated Circuits for Soft Robot Control
We are currently involved in a new multi-disciplinary research initiative at Tufts to investigate
the development of biomimetic soft-bodied robots. Our research efforts are focused on the
implementation of bio-inspired VLSI systems to control robot movement and dynamically adapt robot
behavior based on sensory feedback signals. The control system for the soft bodied robot will be
based on the concept of a central pattern generator using flexible animals such as the caterpillar,
Manduca sexta, as a model system.
Completed Projects:
Control Systems Design of a Soft Bodied Endoscope
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