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We present a digital dilution chip, capable of exponential sample dilution and reaction of them with another sample, using the selective control of inter-well valves. The present chip discretely merges and splits a fixed fluidic volume in the well array by controlling inter-well valves around a well. Thus, it is easy to achieve a fixed volume of the diluted samples and make reaction of them with another...
We present a micromechanical digital-to-analog (DA) tunable capacitor using a parallel digital actuator array, which is capable of accomplishing high-precision tuning and quality factor improvement. The present DA tunable capacitor uses a parallel interconnection of digital actuators and thus achieves a low-resistive structure for wireless communications. Based on the criteria for the capacitance...
We present a micromechanical active amplifier, inspired from the principle of the outer hair cells in cochlea, amplifying both displacement and force. The present micromechanical active amplifier modulates the resonant carrier motion using the variable stiffness spring whose stiffness changes proportionally to the input motion. We design, fabricate, and characterize two types of the amplifiers A and...
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...
We present micromechanical active amplifiers using carrier motion in the mechanical resonance, thereby performing the amplification of displacement, force, and energy. The carrier motion is modulated by variable stiffness springs whose stiffness change is proportional to input motion. We design, fabricate, and test two types of the amplifiers A and B, including two different variable stiffness springs...
We present a new micromechanical tunable capacitor using parallel interconnection of digital actuators with different unit displacements, capable to accomplish a high-precision tuning in practical RF communication. We design, fabricate, and test this digital-to-analog tunable capacitor with 4-bit digital actuators with driving voltage of 25 V. The present digital-to-analog tunable capacitor shows...
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