The Experts below are selected from a list of 229602 Experts worldwide ranked by ideXlab platform

Kari Halonen - One of the best experts on this subject based on the ideXlab platform.

  • ISCAS - Ultra-Low Power Wide-Dynamic-Range Universal Interface for Capacitive and Resistive Sensors
    2018 IEEE International Symposium on Circuits and Systems (ISCAS), 2018
    Co-Authors: Mohammad Mehdi Moayer, Jarno Salomaa, Mika Pulkkinen, Kari Halonen
    Abstract:

    This paper presents an ultra-low power, wide-dynamic-Range interface circuit for capacitive and resistive sensors. It is implemented as a switched-capacitor circuit using tunable capacitors to achieve high configurability. The circuit was fabricated using a 0.18μm CMOS technology. Measured results show that the circuit is able to interface various sensors within the overall capacitance Range of 0.6–550pF and Resistance Range of 3.7kΩ–5.1MΩ, while consuming only 0.39–3.56μW, from a 1.2V supply.

Mohammad Mehdi Moayer - One of the best experts on this subject based on the ideXlab platform.

  • ISCAS - Ultra-Low Power Wide-Dynamic-Range Universal Interface for Capacitive and Resistive Sensors
    2018 IEEE International Symposium on Circuits and Systems (ISCAS), 2018
    Co-Authors: Mohammad Mehdi Moayer, Jarno Salomaa, Mika Pulkkinen, Kari Halonen
    Abstract:

    This paper presents an ultra-low power, wide-dynamic-Range interface circuit for capacitive and resistive sensors. It is implemented as a switched-capacitor circuit using tunable capacitors to achieve high configurability. The circuit was fabricated using a 0.18μm CMOS technology. Measured results show that the circuit is able to interface various sensors within the overall capacitance Range of 0.6–550pF and Resistance Range of 3.7kΩ–5.1MΩ, while consuming only 0.39–3.56μW, from a 1.2V supply.

Henning Sirringhaus - One of the best experts on this subject based on the ideXlab platform.

  • Inkjet-printed resistors with a wide Resistance Range for printed read-only memory applications
    Organic Electronics, 2013
    Co-Authors: Sungjune Jung, Antony Sou, E. Gili, Henning Sirringhaus
    Abstract:

    Abstract Inkjet-printed resistors with Resistance values varying over five orders of magnitude were demonstrated on a flexible substrate. The resistivity of printed lines of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) was altered by using different ink formulations and by employing an over-print technique, while the length of the printed resistor line remained unchanged. This technique was then applied to fabricate a printed read-only memory device that consisted of an array of resistors. The concept of printing reliable, visually identical resistors with controlled Resistance values provides an important building block for low cost, printed electronic circuit applications.

R Bragos - One of the best experts on this subject based on the ideXlab platform.

  • error analysis and reduction for a simple sensor microcontroller interface
    IEEE Transactions on Instrumentation and Measurement, 2001
    Co-Authors: A Custodio, R Pallasareny, R Bragos
    Abstract:

    Error analysis of a resistive sensor-to-microcontroller interface based on pulse-width modulation and time-ratio measurement shows that internal input and output Resistances in microcontroller digital ports produce zero, gain and nonlinearity errors. The time-ratio measurement technique cancels these errors when the sensor Resistance equals the reference resistor and reduces errors around that point. We propose two simple methods of reducing those errors for sensors with a wide dynamic Range. Both methods use time-ratio measurements. The first method uses several reference resistors covering the sensor Resistance Range; the second method uses two-point calibration. The second method is more efficient and yields errors that can be smaller than 0.5 /spl Omega/ for a sensor Resistance from about 600 /spl Omega/ to 3550 /spl Omega/.

  • error analysis and reduction for a simple sensor microcontroller interface
    Instrumentation and Measurement Technology Conference, 2000
    Co-Authors: A Custodio, R Pallasareny, R Bragos
    Abstract:

    Error analysis of a resistive sensor-to-microcontroller interface based on pulse-width modulation and time ratio measurement shows that input and output Resistances in digital ports produce zero, gain, and nonlinearity errors. The time-ratio technique cancels these errors when the sensor Resistance equals the calibration reference resistor, and reduces errors in the neighborhood of that point. For sensors with wide dynamic Range, several calibration resistors selected according to the sensor Resistance Range will further reduce those errors. Alternatively, two-point calibration and time ratio measurements yield errors that can be smaller than 0.5 /spl Omega/ for a sensor Resistance from about 600 /spl Omega/ to 3550 /spl Omega/.

Heli Jantunen - One of the best experts on this subject based on the ideXlab platform.

  • interface circuit for resistive sensors utilizing digital potentiometers
    Sensors and Actuators A-physical, 2007
    Co-Authors: Mikko Leinonen, Jari Juuti, Heli Jantunen
    Abstract:

    In this paper an interface for resistive sensors in a bridge configuration is investigated. The interface utilizes digital potentiometers in order to implement an automatic calibration procedure for the bridge circuit offset. Such an approach facilitates the use of digital signal processing with high flexibility; advantageous in modern instrumentation systems. Commercial digital potentiometers have a very limited Resistance Range and therefore this method to overcome the discrete nominal Resistance values was developed. The system was simulated mathematically and automatic calibration of the offset voltage was demonstrated with a prototype. An important additional advantage was an increase in resolution compared to a simple potentiometer circuit.