- Title
- Design and analysis of low-distortion demodulators for modulated sensors
- Creator
- Moore, Steven Ian; Ruppert, Michael G.; Harcombe, David M.; Fleming, Andrew J.; Yong, Yuen K.
- Relation
- IEEE/ASME Transactions on Mechatronics Vol. 24, Issue 4, p. 1861-1870
- Publisher Link
- http://dx.doi.org/10.1109/TMECH.2019.2928592
- Publisher
- Institute of Electrical and Electronics Engineers (IEEE)
- Resource Type
- journal article
- Date
- 2019
- Description
- System-based demodulators in the form of a Kalman and Lyapunov filter have been demonstrated to significantly outperform traditional demodulators, such as the lock-in amplifier, in bandwidth sensitive applications, for example, high-speed atomic force microscopy. Building on their closed-loop architecture, this paper describes a broader class of high-speed closed-loop demodulators. The generic structure provides greater flexibility to independently control the bandwidth and sensitivity to out-of-band frequencies. A linear time invariant description is derived, which allows the utilization of linear control theory to design the demodulator. Experimental results on a nanopositioner with capacitive sensors demonstrate that the realization of arbitrary demodulator dynamics while achieving excellent noise rejection.
- Subject
- system based demodulators; Kalman filters; Lyapunov filters; demodulation
- Identifier
- http://hdl.handle.net/1959.13/1407319
- Identifier
- uon:35718
- Identifier
- ISSN:1083-4435
- Rights
- © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
- Language
- eng
- Full Text
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