Joint Colloquium Distinguished Lecture Series

Energy Efficient Sensor Interfaces

Wednesday, March 9, 2011
306 Soda Hall (HP Auditorium)
4:00 - 5:00 pm

Chinwuba Ezekwe
Senior Research Engineer, Robert Bosch LLC

Downloadable pdf

Abstract:

Interface circuits are the essential components in electronic systems that translate real-world analog quantities into a format that is understood and processed by higher-level applications. Examples of interface circuits include radio frontends, sensor readout circuits, and analog-to-digital converters. The most important performance metrics for these circuits, signal-to-noise ratio and linearity, impose lower bounds on chip area and power dissipation, which are highly dependent on the system and circuit architecture. In this presentation, I will describe a MEMS gyroscope readout circuit that exploits the secondary properties of the micromechanical sensing element together with an energy-efficient sampling technique in a system architecture that uses calibration and feedback control to achieve order-of-magnitude reductions in noise and power dissipation over conventional implementations. I will also describe an extension of the energy-efficient sampling technique to resistive bridge sensor readout electronics.

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