A digitally controlled balanced output transconductor (DCBOTA) is proposed and analyzed. The proposed DCBOTA is based on the BOTA given in Ref. 1 and MOS switches. The DCBOTA transconductance is tunable in a range of 2n−1 times using n bits control word. The proposed DCBOTA is simulated using CMOS 0.35μm technology and the results have shown the feasibility of the proposed DCBOTA. The simulatio...

We discuss the usage of ratchet mechanisms to transport a continuous phase in several micro-fluidic settings. In particular, we study the transport of a dielectric liquid in a heterogeneous ratchet capacitor that is periodically switched on and off. The second system consists of drops on a solid substrate that are transported by different types of harmonic substrate vibrations. We argue that th...

An overview of recent progress in the research and development of microelectromechanical devices for use in wireless communication sub-systems is presented. Among the specific devices described are tunable micromachined capacitors, integrated high-Q inductors, and micro-scale vibrating mechanical resonators with Q’s in the tens of thousands. Specific applications are reviewed for each of these ...

A size-tunable micro-channel is fabricated in a gap between two probe electrodes by freezing aqueous KCl. The channel has been characterized by resistance measurements and channel blocking by resistive particles. The channel size can be varied by the temperature even after the preparation of the channel. The channel is potentially useful not only for size-selective particle counting but also fo...

A superconducting hot-electron bolometer mixer receiver operating from 1 to 1.26 THz has been developed. This heterodyne receiver employs two solid-state local oscillators each consisting of a Gunn oscillator followed by two stages of varactor frequency multiplication. The measured receiver noise temperature is 1350K at 1.035 THz and 2700K at 1.26 THz. This receiver demonstrates that tunable so...

An overview of recent progress in the research and development of microelectromechanical devices for use in wireless communication sub-systems is presented. Among the specific devices described are tunable micromachined capacitors, integrated high-Q inductors, low loss micromechanical switches, and micro-scale vibrating mechanical resonators with Q’s in the tens of thousands. Specific applicati...

This paper presents a micro electrostatic vibration-toelectricity energy converter. For the 3.3 V supply voltage and 1cm chip area constraints, optimal design parameters were found from theoretical calculation and Simulink simulation. In the current design, the output power is 200 μW/cm for the optimal load of 8 MΩ. The device was fabricated in a silicon-on-insulator (SOI) wafer. Mechanical and...

Micro power converters are required for power sensitive, battery-operated devices. Keeping this goal in mind IMT developed a 13-bit RSD cyclic converter. However, inaccuracies (capacitor mismatch, operation amplifier...) resulted in a relative precision behaviour. The implementation of a correction algorithm in a 2 μ m CMOS technology is presented. It requires 1 mm 2 and simulations show that p...

In this work, we describe a simple 1-mask sacrificial layer process that allows us to prototype a tuneable capacitor. The process is specially optimized to procure a dual picks profile of the sacrificial layer. The geometry design and the influence of the structural material stress were considered through the finite element analysis. The FEM simulation with Ansys was used to study in detail pro...