Calibration-Less Direct Inductor-to-Microcontroller Interface

Calibration-less direct capacitor-to- microcontroller interface

A new technique to measure a capacitor or a capacitive sensor by means of a direct sensor-to-microcontroller interface circuit that does not need a calibration capacitor is proposed. Basically, the measurement process consists of three consecutive steps of charge, discharge and charge of the capacitor under test. A non-linear equation is obtained and solved that is dependent only on known circu...

Direct Inductive Sensor - to - Microcontroller Interface Circuit

Improving the Single Point Calibration Technique in Direct Sensor-to-Microcontroller Interface

Abstrac t An improved single point calibration technique applied on direct sensor-to-microcontroller interface is presented. The improvements are in reducing the systematic errors in a given measurement range by increasing the transfer characteristics nonlinearity. The experimental results showed that this approach reduces the overall systematic errors of the measurements more than twice and co...

Improving the Resolution in Direct Inductive Sensor-to-Microcontroller Interface

The paper describes an improved direct inductive sensor to microcontroller interface by incorporating external MOSFET transistors. In such a way, the measured discharging time interval can be increased (through the discharging time constant) which results in increased resolution for a given time base. The experimental results show that the resolution of the measurements can be significantly imp...

Self-Biased Inductor-less Interface Circuit for Electret-Free Electrostatic Energy Harvesters

This paper presents a simple and efficient interface circuit for electrostatic energy harvesting devices, which uses neither controlled electronic switch nor inductor. A built-in voltage multiplier enables to get bias voltages higher than the circuit output voltage, resulting in an increased power output. This interface circuit was implemented using off-the-shelf components. Its operation was v...