A novel PLL-based sensor interface for resistive pressure sensors

Charge-transfer-based Signal Interface for Resistive Sensors

 Charge transfer has been demonstrated to be a cost-effective method to measure capacitive sensors with low-end microcontrollers. Here we apply charge transfer to measure the output of voltage dividers that include a highvalue resistive sensor hence extending the advantages of this method to a large group of sensors. By using two-point calibration, the maximal deviation obtained, referred to t...

A smart and accurate interface for resistive sensors

This paper presents a smart and accurate interface for resistive sensors based on the use of a relaxation oscillator. To obtain high accuracy, good long-term stability and a reduction of the effects of interference and parasitic elements, some classical and new measurement techniques have been applied in the novel sensor interface. Moreover, all multiplicative and additive errors, and the commo...

Resistive pressure sensors based on freestanding membranes of gold nanoparticles.

In this communication the application of gold nanoparticle membranes as ambient pressure sensors with electromechanical signal transduction is demonstrated. The devices were fabricated by sealing microstructured cavities with membranes of 1,6-hexanedithiol cross-linked gold nanoparticles, which were electrically contacted by metal electrodes deposited on both sides of the cavities. Variations o...

A current conveyor-based relaxation oscillator as a versatile electronic interface for capacitive and resistive sensors

Oscillators are widely used as electronic interface for sensors (Filanovsky 1994). This is attributed to their simplicity and immunity to electromagnetic interference (Pallas-Areny and Webster 1991). While harmonic oscillators, widely used with capacitive and inductive sensors, have a very high sensitivity due to their resonant nature, relaxation oscillators are simpler and less sensitive (Pall...

A PLL based built-in self-test for MEMS sensors