Single-Crystal Capacitive Sensors In article number 2204065, Min Tu, Rob Ameloot, and co-workers develop a space-confined synthesis method to fabricate surface-embossed micropatterns surface-embedded gold electrodes on metal–organic framework single crystals. A capacitive gas sensor is constructed by embedding Au HKUST-1 flat crystals used for the investigation of ethanol diffusion in pores.

Problem statement: The design of Capacitance to Voltage Converter (CVC) for capacitive sensor transducer was presented. The proposed design will reduce the size, power consumption and supply voltage of the circuit and can be used in high frequency band transducer. Approach: The design was implemented using the Operational amplifier (Op amp) and capacitive network. The circuit was simulated usin...

This paper presents the control design and experimentation of a prototype electromagnetic scanner with an integrated capacitive linear and rotational position sensor for small form factor probe storage. An array of probe heads is to be precisely positioned in X/Y linear and rotation directions so that high areal density (>1 terabit/in) and high data throughput can be achieved. The scanner has X...

An ASIC implementation of capacitive fingerprint sensor is described for user authentication on small, thin, and portable equipment. New charge sharing sensing circuit minimizes the influence of internal parasitic capacitances and enlarges the voltage difference between a ridge and valley. A voltage comparator can easily discriminate a ridge and valley. Our method results in about 180% improvem...

A prototypical metal-organic framework (MOF), a 2D periodic porous structure based on the assembly of copper ions and benzene dicarboxylate (bdc) ligands (Cu(bdc)·xH2O), was grown successfully as a thin film on interdigitated electrodes (IDEs). IDEs have been used for achieving planar CMOS-compatible low-cost capacitive sensing structures for the detection of humidity and volatile organic compo...

CAPACITIVE SENSOR ACTUATION In the semiconductor industry there is a need for controlling the displacement of machine parts such as optical elements with sub-nanometer uncertainty within a motion range of several micrometers. This combination makes capacitive measurement a suitable method to acquire the required displacement data. In order to achieve sufficient sensitivity and linearity the mea...

Traditional capacitive tactile sensor sheets usually have a three-layered structure, with a dielectric layer sandwiched by two electrode layers. Each electrode layer has a number of parallel ribbon-like electrodes. The electrodes on the two electrode layers are oriented orthogonally and each crossing point of the two perpendicular electrode arrays makes up a capacitive sensor cell on the sheet....

The purpose of this application note is to describe the best design practices when developing capacitive touch applications in noisy environments. This application note will begin by defining the problems caused by noise, and explain how that noise typically affects systems. Hardware guidelines will then be provided to help maximize the natural signal-to-noise ratio (SNR) of the application. So...

This paper reports result of calculation and experimental realization of an electromechanical system that consists of a high-Q mechanical oscillator parametrically coupled in the manner of a capacitive transducer with a radio frequency (RF) circuit, which is in turn inductively coupled with another RF circuit. The system operates in the resolved sideband regime when the mechanical oscillator's ...