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High-order SigmaDelta interface for ...
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Petkov, Vladimir Plamenov.
High-order SigmaDelta interface for micromachined inertial sensors.
Record Type:
Electronic resources : Monograph/item
Title/Author:
High-order SigmaDelta interface for micromachined inertial sensors.
Author:
Petkov, Vladimir Plamenov.
Description:
95 p.
Notes:
Chair: Bernhard E. Boser.
Notes:
Source: Dissertation Abstracts International, Volume: 65-09, Section: B, page: 4746.
Contained By:
Dissertation Abstracts International65-09B.
Subject:
Engineering, Electronics and Electrical.
Online resource:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3146976
ISBN:
0496053647
High-order SigmaDelta interface for micromachined inertial sensors.
Petkov, Vladimir Plamenov.
High-order SigmaDelta interface for micromachined inertial sensors.
- 95 p.
Chair: Bernhard E. Boser.
Thesis (Ph.D.)--University of California, Berkeley, 2004.
Among various techniques for implementing inertial sensor interfaces, SigmaDelta modulation provides the benefits of intrinsically linear, two-level force-feedback and analog-to-digital conversion. Analysis of state-of-the-art, second-order SigmaDelta inertial sensors, however, shows that the inherent digitization brings a significant resolution penalty, which cannot be eliminated by simply increasing the oversampling ratio. In addition, a tradeoff between resolution and phase compensation forces the feedback loop in second-order systems to operate with reduced phase margin.
ISBN: 0496053647Subjects--Topical Terms:
226981
Engineering, Electronics and Electrical.
High-order SigmaDelta interface for micromachined inertial sensors.
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Petkov, Vladimir Plamenov.
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High-order SigmaDelta interface for micromachined inertial sensors.
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95 p.
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Chair: Bernhard E. Boser.
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Source: Dissertation Abstracts International, Volume: 65-09, Section: B, page: 4746.
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Thesis (Ph.D.)--University of California, Berkeley, 2004.
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Among various techniques for implementing inertial sensor interfaces, SigmaDelta modulation provides the benefits of intrinsically linear, two-level force-feedback and analog-to-digital conversion. Analysis of state-of-the-art, second-order SigmaDelta inertial sensors, however, shows that the inherent digitization brings a significant resolution penalty, which cannot be eliminated by simply increasing the oversampling ratio. In addition, a tradeoff between resolution and phase compensation forces the feedback loop in second-order systems to operate with reduced phase margin.
520
#
$a
As a proof of concept a fourth-order SigmaDelta interface was implemented in a standard 0.5mum CMOS process and tested with a gyroscope and accelerometer achieving 1°/sec/√Hz and 150mug/√Hz of resolution, respectively. Comparison between measurement and simulation shows that the contribution of the quantization error to the total noise of the system is negligible.
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Emerging automotive and consumer applications such as vehicle stability control, GPS backup and many others are generating a growing demand for inertial sensors with an increasing range of functionality including digital interfacing, built-in self-test, calibration and temperature compensation.
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This dissertation presents high-order SigmaDelta modulation as a solution to the resolution and phase compensation limitations of existing implementations. The proposed system performs additional electronic filtering in the feedback loop to eliminate the quantization noise overhead and allows for increased phase compensation without degrading the resolution.
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School code: 0028.
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http://libsw.nuk.edu.tw:81/login?url=http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3146976
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http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3146976
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