High sensitivity noise measurement with a correlation spectrum analyzer

Sampietro, N.; Accomando, G.; Fasoli, L.; Ferrari, Giorgio; Gatti, E.

doi:10.1109/19.863931

Cited by 35 publications

(22 citation statements)

References 5 publications

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“…1(b), measure the correlated noise between the two channels, rejecting a large portion of the uncorrelated amplifier noise. Residual cross talk 17,21 between the two channels offsets the data by 2.6 K.…”

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confidence: 99%

“…Previously, cross-correlation measurements were limited to frequencies below a few MHz due to the practical implementation of multipliers and digital processing speeds. 18,20,21 The 2 GHz analog multiplier and LNA, combined with the lock-in amplifier modulation scheme described in Fig. 1(b), measure the correlated noise between the two channels, rejecting a large portion of the uncorrelated amplifier noise.…”

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confidence: 99%

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Development of high frequency and wide bandwidth Johnson noise thermometry

Crossno

Liu

Ohki

et al. 2015

Applied Physics Letters

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We develop a high frequency, wide bandwidth radiometer operating at room temperature, which augments the traditional technique of Johnson noise thermometry for nanoscale thermal transport studies. Employing low noise amplifiers and an analog multiplier operating at 2 GHz, auto-and cross-correlated Johnson noise measurements are performed in the temperature range of 3 to 300 K, achieving a sensitivity of 5.5 mK (110 ppm) in 1 second of integration time. This setup allows us to measure the thermal conductance of a boron nitride encapsulated monolayer graphene device over a wide temperature range. Our data shows a high power law (T ∼4 ) deviation from the Wiedemann-Franz law above T∼100 K.

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confidence: 99%

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confidence: 99%

Development of high frequency and wide bandwidth Johnson noise thermometry

Crossno

Liu

Ohki

et al. 2015

Applied Physics Letters

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“…It can be shown that the effective noise power added by the system decreases with 1.5 dB for every doubling of measurement time [9]- [11], and can be reduced by as much as 50 dB [9].…”

Section: Cross-correlationmentioning

confidence: 99%

“…Using cross-correlation to lower system noise is not a new idea; it is in widespread use in radio-astronomy [12], it has been used in [9] to measure the thermal noise of a resistor, and it is briefly mentioned in [13] as more robust in the presence of noise uncertainty. In communications literature the content seems to be limited.…”

Section: Cross-correlationmentioning

confidence: 99%

A 50Mhz-To-1.5Ghz Cross-Correlation CMOS Spectrum Analyzer for Cognitive Radio with 89dB SFDR in 1Mhz RBW

Alink

Klumperink

Soer

et al. 2010

2010 IEEE Symposium on New Frontiers in Dynamic Spectrum (DySPAN)

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Abstract-Spectrum sensing for cognitive radio requires a high linearity to handle strong signals, and at the same time a low noise figure (NF) to enable detection of much weaker signals. Often there is a trade-off between linearity and noise: improving one of them degrades the other. Cross-correlation can break this trade-off by reducing noise at the cost of measurement time. An existing RF front-end in CMOS-technology with IIP3=+11dBm and NF<6.5dB is duplicated and attenuators are put in front to increase linearity (IIP3=+24dBm). The attenuation degrades NF, but by using cross-correlation of the outputs of the two frontends, the NF is reduced to below 4dB. In total this results in a spurious-free dynamic range (SFDR) of 89dB in 1MHz resolution bandwidth (RBW).

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“…13 The second approach consists of using measurement methods which take advantage of the uncorrelation between the noise due to the device under test and the noise introduced by the preamplifiers, in order to obtain a background noise of the entire measurement system significantly lower with respect to the noise due to the preamplifiers. [14][15][16][17] Recently, we have proposed a high sensitivity method for voltage noise measurements, which allows, at least in principle, the complete elimination of the noise introduced by the amplifiers used for the measurements. 18 In this work, starting from the same basic idea, we have developed and experimentally validated a high sensitivity method for current noise measurements, which allows, at least in principle, the complete elimination of the noise introduced by the measurement amplifiers.…”

Section: Introductionmentioning

confidence: 99%

Ultrasensitive method for current noise measurements

Giusi

Crupi

Ciofi

et al. 2006

Review of Scientific Instruments

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In this article we propose a method for current noise measurements which allows, at least in principle, the complete elimination of the noise introduced by the measurement amplifiers. We present a detailed circuit analysis which illustrates the advantages of the proposed measurement procedure with respect to the conventional techniques. The validity of this measurement method is confirmed by the results obtained by means of SPICE simulations and by measurements performed on a prototype circuit.

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High sensitivity noise measurement with a correlation spectrum analyzer

Cited by 35 publications

References 5 publications

Development of high frequency and wide bandwidth Johnson noise thermometry

Development of high frequency and wide bandwidth Johnson noise thermometry

A 50Mhz-To-1.5Ghz Cross-Correlation CMOS Spectrum Analyzer for Cognitive Radio with 89dB SFDR in 1Mhz RBW

Ultrasensitive method for current noise measurements

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