Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
738503 | Sensors and Actuators A: Physical | 2009 | 11 Pages |
Abstract
A continuous-time accelerometer interface is feasible when a high dynamic range together with a wide signal band is required. In this paper the implementation of a continuous-time force-feedback loop for a capacitive sensor element with a full-scale signal of ±1.5±1.5 g is presented. The interface is measured to attain a noise equivalent acceleration (NEA) density of 500 ng/Hz at 30 Hz for the on-chip digitized output and 300 ng/Hz at 30 Hz for the analog output using a capacitive half-bridge sensor element with a single pair of electrodes. The essential circuit structures of the closed-loop sensor will be presented and analyzed in detail.
Related Topics
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Authors
Lasse Aaltonen, Kari Halonen,