Publication

Direct Piezoresistive Simulation Tool

Nico de Rooij
2011
Posters

Abstract

Biosensors often require detecting infinitesimal amount of species, thus their readout must be improved for highest sensitivity and best Signal-to-Noise ratio. We will present a simulation tool for piezoresistive strain sensors, which takes into account nonuniform current flow in e.g., a U-shaped piezoresistor, and calculates local resistivity changes based on the piezoresistive coefficients with corresponding directions. This simulation tool yields DR/R as a result. Thus a real piezoresistor layout, rather than a symbolic resistor, can be simulated. Important aspects of optimum piezoresistive readout for biosensors will be discussed.

Official source

https://infoscience.epfl.ch/entities/publication/91255fa5-2190-45a2-81a2-7b957589669e

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Nico de Rooij
2011
Posters

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/91255fa5-2190-45a2-81a2-7b957589669e

About this result

Related concepts (32)

Signal-to-noise ratio

Signal-to-noise ratio (SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise. SNR is defined as the ratio of signal power to noise power, often expressed in decibels. A ratio higher than 1:1 (greater than 0 dB) indicates more signal than noise. SNR is an important parameter that affects the performance and quality of systems that process or transmit signals, such as communication systems, audio systems, radar systems, imaging systems, and data acquisition systems.

Carrier-to-noise ratio

In telecommunications, the carrier-to-noise ratio, often written CNR or C/N, is the signal-to-noise ratio (SNR) of a modulated signal. The term is used to distinguish the CNR of the radio frequency passband signal from the SNR of an analog base band message signal after demodulation. For example, with FM radio, the strength of the 100 MHz carrier with modulations would be considered for CNR, whereas the audio frequency analogue message signal would be for SNR; in each case, compared to the apparent noise.

Noise (electronics)

In electronics, noise is an unwanted disturbance in an electrical signal. Noise generated by electronic devices varies greatly as it is produced by several different effects. In particular, noise is inherent in physics and central to thermodynamics. Any conductor with electrical resistance will generate thermal noise inherently. The final elimination of thermal noise in electronics can only be achieved cryogenically, and even then quantum noise would remain inherent. Electronic noise is a common component of noise in signal processing.

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Direct Piezoresistive Simulation Tool

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