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VCSEL driver

Increasing bandwidth requirements have pushed the traditionally electrical wireline interconnects within computing systems and data centers to their limits. As data-rates
scale, the shortcomings of electrical channels are becoming more severe. Technology scaling favors I/O circuit performance, but the bandwidth of electrical channels does not scale with the same trend. Several receiver and transmitter equalization techniques have been proposed to overcome this bandwidth limitation. However, these compensation techniques consume considerable power and die area, and, as a result, current high-speed I/O link designs are increasingly becoming power and channel-limited.

Location-Broadcasting Chips

We present an alternative approach to microscale device localization based on concepts from nuclear magnetic resonance. In particular, the magnetic-field-dependent precession frequency of nuclear spins allows their location in space to be encoded through the application of magnetic field gradients. This allows MRI to visualize signals from nuclear spins located throughout a specimen with ~100 µm resolution.

3D-Integrated High-sensitivity Optical Receiver

Increasing Silicon integration leads to better performance in optical links but necessitates a corresponding co-design strategy in both electronics and photonics. In this project a 3D-integrated CMOS/Silicon-photonic receiver is presented. The receiver is specifically designed to take advantage of low-cap 3D integration and advanced silicon photonics.

Fully Implantable Glucose and Lactate Sensor

Miniaturization of implantable biosensors for continuous, in vivo monitoring of clinically relevant analytes is an important step toward viability of such devices. While wireless power delivery via on-chip antennas promises miniaturization and realization of minimally invasive devices, it can only support low levels of power consumption. This is due to the significant tissue absorption at high frequencies, small size of the chip and quality factor of on-chip inductors. Therefore, reducing the power consumption of the sensor while maintaining high sensitivity and dynamic range is crucial.