This paper reports our work on developing a surface tension actuated micro-robotic platform supported by three bubbles (liquid environment) or droplets (gaseous environment). The actuation principle relies on the force developed by surface tension below a millimeter, which benefits from scaling laws, and is used to actuate this new type of compliant robot. By separately controlling the pressure...

The analog electronics is a challenging subject for undergraduate students in electrical engineering, due to the complex combination of many previous subjects, such as linear circuit analysis, signal and system, linear control theory and some sort of mathematics. This paper presents the modeling, analysis and design of the operational amplifier, which is used as benchmark system for analog elec...

Membrane protein prestin is a critical component of the motor complex that generates forces and dimensional changes in cells in response to changes in the cell membrane potential. In its native cochlear outer hair cell, prestin is crucial to the amplification and frequency selectivity of the mammalian ear up to frequencies of tens of kHz. Other cells transfected with prestin acquire voltage-dep...

An approach to implement single-ended power-efficient static class-AB Miller op-amps with symmetrical and significantly enhanced slew-rate accurately controlled output quiescent current is introduced. The proposed op-amp can drive a wide range of resistive capacitive loads. positive negative currents be much higher than the total current. performance achieved by utilizing simple low-power auxil...

In this paper, we present a simple interface circuit for measuring impedance based on a second-order harmonic oscillator. The circuit is intended for testing the sterility of aseptically packed food products, where it must measure the conductivity changes of the packaged food in a nondestructive way. The measured impedance is modeled as a low-ohmic resistor (representing the conductivity of the...

We describe the use of textile sensors mounted in a garment sleeve to detect affective gestures. The ‘ Sensor Sleeve’ is part of a larger project to explore the role of affect in communications. Pressure activated, capacitive and elasto-resistive sensors are investigated and their relative merits reported on. An implemented application is outlined in which a cellphone receives messages derived ...

Computer simulation of high-speed Gallium Arsenide Charge Coupled Devices is performed using an established twodimensional semiconductor device simulation program. The effect of active layer thickness on the Charge Transfer Efficiency (CTE) and the dynamic range is investigated using different active layers. Also, different gate architectures are compared for optimum dynamic range and compatibi...