Publication

T0003 / MilliNewton & CentoNewton force sensors / Deviation from ratiometric behaviour

Thomas Maeder
2014
Reports

Abstract

This document concerns the deviation of the output of MilliNewton and CentoNewton force sensors from ideal ratiometric behaviour. These sensors nominally operate from a single +5 V supply voltage and, as they have no voltage regulator, their output response should be ideally "ratiometric", i.e. proportional to supply voltage, within the operating range of the used amplifier chip. However, due to the amplifier characteristics (nonlinear offset), a substantial deviation of the sensor offset (zero-load output) from this ideal behaviour can appear if the supply voltage strongly deviates from 5 V. On the other hand, the span remains essentially ratiometric, and sensor functionality is maintained.

Official source

https://infoscience.epfl.ch/entities/publication/8bec4c8d-1b07-453d-a398-5abc301d9a97

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Thomas Maeder
2014
Reports

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/8bec4c8d-1b07-453d-a398-5abc301d9a97

About this result

Related concepts (32)

Amplifier

An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the magnitude of a signal (a time-varying voltage or current). It is a two-port electronic circuit that uses electric power from a power supply to increase the amplitude (magnitude of the voltage or current) of a signal applied to its input terminals, producing a proportionally greater amplitude signal at its output. The amount of amplification provided by an amplifier is measured by its gain: the ratio of output voltage, current, or power to input.

Voltage regulator

A voltage regulator is a system designed to automatically maintain a constant voltage. A voltage regulator may use a simple feed-forward design or may include negative feedback. It may use an electromechanical mechanism, or electronic components. Depending on the design, it may be used to regulate one or more AC or DC voltages. Electronic voltage regulators are found in devices such as computer power supplies where they stabilize the DC voltages used by the processor and other elements.

Operational amplifier

An operational amplifier (often op amp or opamp) is a DC-coupled high-gain electronic voltage amplifier with a differential input and, usually, a single-ended output. In this configuration, an op amp produces an output potential (relative to circuit ground) that is typically 100,000 times larger than the potential difference between its input terminals. The operational amplifier traces its origin and name to analog computers, where they were used to perform mathematical operations in linear, non-linear, and frequency-dependent circuits.

Related publications (23)

T0003 / MilliNewton & CentoNewton force sensors / Deviation from ratiometric behaviour

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