On the Use of Supercapacitors for DC Blocking in Transformer-Coupled Voltage Amplifiers for Low-Frequency Noise Measurements

Scandurra, G.; Achtenberg, Krzysztof; Bielecki, Z.; Mikołajczyk, J.; Ciofi, C.

doi:10.3390/electronics11132011

Cited by 4 publications

(2 citation statements)

References 25 publications

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“…Noise contribution from the filter resistance must become negligible at the minimum frequency of interest f min . It means that the frequency corner of the AC filter must be much smaller than f min [ 92 , 93 ]. The resulting long-time constant may cause long transients (in the order of minutes) if f min is in the range of hundreds of mHz.…”

Section: Methodsmentioning

confidence: 99%

Flicker Noise in Resistive Gas Sensors—Measurement Setups and Applications for Enhanced Gas Sensing

Smulko,

Scandurra,

Drozdowska

et al. 2024

Sensors

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We discuss the implementation challenges of gas sensing systems based on low-frequency noise measurements on chemoresistive sensors. Resistance fluctuations in various gas sensing materials, in a frequency range typically up to a few kHz, can enhance gas sensing by considering its intensity and the slope of power spectral density. The issues of low-frequency noise measurements in resistive gas sensors, specifically in two-dimensional materials exhibiting gas-sensing properties, are considered. We present measurement setups and noise-processing methods for gas detection. The chemoresistive sensors show various DC resistances requiring different flicker noise measurement approaches. Separate noise measurement setups are used for resistances up to a few hundred kΩ and for resistances with much higher values. Noise measurements in highly resistive materials (e.g., MoS2, WS2, and ZrS3) are prone to external interferences but can be modulated using temperature or light irradiation for enhanced sensing. Therefore, such materials are of considerable interest for gas sensing.

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Section: Methodsmentioning

confidence: 99%

Flicker Noise in Resistive Gas Sensors—Measurement Setups and Applications for Enhanced Gas Sensing

Smulko,

Scandurra,

Drozdowska

et al. 2024

Sensors

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“…However, detector technology development poses a significant challenge for designing "noiseless" read-out electronics. In papers [15][16][17][18], we analysed some advanced development methods to minimise the noise influence of such electronics.…”

Section: Introductionmentioning

confidence: 99%

Two-Channel Detecting Sensor with Signal Cross-Correlation for FTIR Instruments

Achtenberg

Mikołajczyk

Bielecki

2022

Sensors

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This paper’s purpose was to demonstrate a performance of a novel approach in a low-noise optical sensor for an FTIR spectrometer. Methods: Compared to the standard FTIR detection setup, our sensor ensures a higher signal-to-noise ratio (SNR) and lower signal standard deviation by reducing the uncorrelated noise components (e.g., thermal and 1/f noises of the detection module). Its construction is based on two-channel detection modules and a processing unit with implemented cross-correlation signal analyses. Each module was built of LWIR HgCdTe photodiodes and low-noise transimpedance amplifiers. Results: the experiments demonstrated a decrease in a signal standard deviation of about 1.7 times with a 10 dB-improvement in the SNR. Conclusion: this result indicates our sensor’s main benefit, especially in registered “weak” and noisy interferograms.

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A review of design approaches for the implementation of low-frequency noise measurement systems

Scandurra

Ciofi

Smulko

et al. 2022

Review of Scientific Instruments

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Electronic noise has its roots in the fundamental physical interactions between matter and charged particles, carrying information about the phenomena that occur at the microscopic level. Therefore, Low-Frequency Noise Measurements (LFNM) are a well-established technique for the characterization of electron devices and materials and, compared to other techniques, they offer the advantage of being non-destructive and of providing a more detailed view of what happens in the matter during the manifestation of physical or chemical phenomena. For this reason, LFNM acquire particular importance in the modern technological era in which the introduction of new advanced materials requires in-depth and thorough characterization of the conduction phenomena. LFNM also find application in the field of sensors, as they allow to obtain more selective sensing systems even starting from conventional sensors. Performing meaningful noise measurements, however, requires that the background noise introduced by the measurement chain be much smaller than the noise to be detected and the instrumentation available on the market does not always meet the specifications required for reaching the ultimate sensitivity. Researchers willing to perform LFNM must often resort to the design of dedicated instrumentation in their own laboratories, but their cultural background does not necessarily include the ability to design, build, and test dedicated low noise instrumentation. In this review, we have tried to provide as much theoretical and practical guidelines as possible, so that even researchers with a limited background in electronic engineering can find useful information in developing or customizing low noise instrumentation.

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On the Use of Supercapacitors for DC Blocking in Transformer-Coupled Voltage Amplifiers for Low-Frequency Noise Measurements

Cited by 4 publications

References 25 publications

Flicker Noise in Resistive Gas Sensors—Measurement Setups and Applications for Enhanced Gas Sensing

Flicker Noise in Resistive Gas Sensors—Measurement Setups and Applications for Enhanced Gas Sensing

Two-Channel Detecting Sensor with Signal Cross-Correlation for FTIR Instruments

A review of design approaches for the implementation of low-frequency noise measurement systems

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