Currently on going Projects

Implantable Micro-System for Neural Recording and Stimulation

Biomedical Implants are the chip level microelectronic systems, popularly known as telemetry chips. Stimulation and neural recording are the two main purposes of these implants. Prosthetic devices, used by disabled persons, sense the stimulus from environment and send it to the brain through the implant. This procedure of receiving stimulus signal and sending it to brain is called stimulation. The brain analyses the stimulus and generates a response for the prosthesis, and this back journey requires neural recording by the implanted chip. The microchip acts as a brain-machine interface. At AMSG we aim to develop a working prototype of low power and low area consuming telemetry powered neural recording and stimulation system. We are using NCSU AMI06 technology with Cadence5 to implement the neural interface and circuit level wireless data and power telemetry.

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More information on this project and the latest progress we have made could be seen at the following links of lab member's personal pages:

Digitally Assisted Analog Circuits

During the last 15 years increase in the performance of digital ICs has become 150 times more than their analog counterparts. Since any real world system must compose of analog components, slow advancement of analog integrated circuits is now actually hindering the development of digital electronics. If these trends continue to occur, this problem is likely to become worse in the near future. Digitally Assisted Analog Circuits is a recently proposed method that has tremendous potential to nullify this effect. Basic idea is to simplify the analog circuits at the cost of decreased precision. This loss in precision is then modeled and compensated in the digital domain. This project has been funded by Higher Education Commission.

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More information on this project and the latest progress we have made could be seen at the following links of lab member's personal pages:


Previous Projects

Switched Mode Transmitter Architecture

The project aims to minimize the losses in RF transmitters by deploying RF switchmode power amplification for varying envelope signals.
The key idea is to transmit either a full RF period or none at all in such a way that the correct modulated RF signal is obtained after filtering. The designed modulator is easy to implement, displays very good linearity and offers time domain signals that promote the power efficiency of the power amplifier. The Modulator design is going on in collaboration with IHP Microelectronics, Germany. The Research Activities for the design of Switch-mode Power amplifiers has recently started at SEECS NUST.

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Hybrid Solid State Disk Project

The exponential growth of vast quantities of data in digital age is outpacing the development of system infrastructure needed to support data-driven 21st century applications. One of the major challenges of today's Industry is to provide uniform high-speed memory access to multi-terabyte data structures for 21st century data intensive applications.The current facts that give rise to the need of a new architecture for the hard disk are:

* Current Hard Disk Drives (HDD) are electro - mechanical in nature and therefore extremely slow and consume large amount of energy.
* Increasing performance disparity between processor and memory hierarchy has been widening too fast giving rise to performance gap.
* Total carbon footprint, due to power consumption in the ICT, is becoming very large; for instance, the carbon footprint due to ICT is approximately equal to that of the UK aircraft industry.

High performance and energy efficient computing systems are required to be designed to address these issues.

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