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|Title:||Micromechanical torsional digital-to-analog converter for open-loop angular positioning applications|
|Authors:||Zhou, G. |
|Source:||Zhou, G.,Tay, F.E.H.,Chau, F.S.,Zhao, Y.,Logeeswaran, V.J. (2004-05). Micromechanical torsional digital-to-analog converter for open-loop angular positioning applications. Journal of Micromechanics and Microengineering 14 (5) : 737-745. ScholarBank@NUS Repository. https://doi.org/5/012|
|Abstract:||This paper reports a novel micromechanical torsional digital-to-analog converter (MTDAC), operated in open-loop with digitally controlled precise multi-level tilt angles. The MTDAC mechanism presented is analogous to that of an electrical binary-weighted-input digital-to-analog converter (DAC). It consists of a rigid tunable platform, an array of torsional microactuators, each operating in a two-state (on/off) mode, and a set of connection beams with binary-weighted torsional stiffnesses that connect the actuators to the platform. The feasibility of the proposed MTDAC mechanism was verified numerically by finite element simulations and experimentally with a commercial optical phase-shifting interferometric system. A prototype 2-bit MTDAC was implemented using the poly-MUMPS process achieving a full-scale output tilt angle of 1.92° with a rotation step of 0.64°. This mechanism can be configured for many promising applications, particularly in beam steering-based OXC switches.|
|Source Title:||Journal of Micromechanics and Microengineering|
|Appears in Collections:||Staff Publications|
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