NDLI: Muscle-Inspired Micromechanical Digital-to-Analog Variable Capacitors Using Parallel Digital Actuator Array

Content Provider	IEEE Xplore Digital Library
Author	Won Han Young-Ho Cho
Copyright Year	2007
Description	Author affiliation: Korea Adv. Inst. of Sci. & Technol., Taejon (Won Han; Young-Ho Cho)
Abstract	We present a high-precision digital-to-analog (DA) variable capacitor, inspired from the structure and principle of biological muscle actuators. The present DA variable capacitor composed of parallel-interconnected digital actuators performs high-precision capacitance adjustment, while achieving high Q due to low-loss interconnection structure. We design, fabricate, and characterize the DA variable capacitor using 4-bit digital actuators with the operation voltage of 25V. In experimental study, the DA variable capacitor changes the capacitance from 2.268 to 3.973pF (0.5GHz), 2.384 to 4.197pF (1.0GHz), and 2.773 to 4.826pF (2.5GHz); thus, achieving the capacitance tuning range of 75.2%, 76.1%, and 74.0%, respectively. The capacitance precision of the DA variable capacitor is measured as 6.16plusmn4.24fF (0.5GHz), 7.42plusmn5.48fF (1.0GHz), and 9.56plusmn5.63fF (2.5GHz), resulting in 10 times improvement of the precision (>100fF) in the conventional analog variable capacitors. The Q factor of the DA variable capacitor is measured as 34plusmn8 (0.5GHz), 18plusmn5 (1.0GHz), and 4plusmn1 (2.5GHz). We experimentally verify the high-precision tuning capability of the muscle-inspired micromechanical DA variable capacitor with high Q for RF communication applications.
Starting Page	221
Ending Page	226
File Size	6620028
Page Count	6
File Format	PDF
ISBN	1424412196
DOI	10.1109/ICIA.2007.4295730
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-07-08
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Actuators Digital-to-Analog Actuators Capacitors Muscles Variable capacitors Capacitance measurement Capacitance precision Nanobioscience Tuning Micromechanical devices Electrodes Q measurement Quality factor Muscle fiber Springs
Content Type	Text
Resource Type	Article

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