Electrical Engineering
      and Computer Sciences

Electrical Engineering and Computer Sciences

COLLEGE OF ENGINEERING

UC Berkeley

   

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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