Thermal noise limit for time‐domain analogue signal processing in CMOS technologies

2016 ◽  
Vol 52 (18) ◽  
pp. 1567-1569 ◽  
Author(s):  
A. Pathan ◽  
A. Liscidini
Keyword(s):  
Signal Processing ◽  
Time Domain ◽  
Thermal Noise ◽  
Analogue Signal ◽  
Noise Limit

scholarly journals Thermal noise limit for ultra-high vacuum noncontact atomic force microscopy

2013 ◽  
Vol 4 ◽  
pp. 32-44 ◽  
Author(s):  
Jannis Lübbe ◽  
Matthias Temmen ◽  
Sebastian Rode ◽  
Philipp Rahe ◽  
Angelika Kühnle ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Signal Processing ◽  
Transfer Function ◽  
Spectral Density ◽  
Thermal Noise ◽  
Noise Spectral Density ◽  
Force Microscopy ◽  
Atomic Force ◽  
Noise Limit ◽  
Signal Processing Electronics

The noise of the frequency-shift signal Δf in noncontact atomic force microscopy (NC-AFM) consists of cantilever thermal noise, tip–surface-interaction noise and instrumental noise from the detection and signal processing systems. We investigate how the displacement-noise spectral density d z at the input of the frequency demodulator propagates to the frequency-shift-noise spectral density d Δ f at the demodulator output in dependence of cantilever properties and settings of the signal processing electronics in the limit of a negligible tip–surface interaction and a measurement under ultrahigh-vacuum conditions. For a quantification of the noise figures, we calibrate the cantilever displacement signal and determine the transfer function of the signal-processing electronics. From the transfer function and the measured d z , we predict d Δ f for specific filter settings, a given level of detection-system noise spectral density d z ds and the cantilever-thermal-noise spectral density d z th. We find an excellent agreement between the calculated and measured values for d Δ f . Furthermore, we demonstrate that thermal noise in d Δ f , defining the ultimate limit in NC-AFM signal detection, can be kept low by a proper choice of the cantilever whereby its Q-factor should be given most attention. A system with a low-noise signal detection and a suitable cantilever, operated with appropriate filter and feedback-loop settings allows room temperature NC-AFM measurements at a low thermal-noise limit with a significant bandwidth.

Editorial. Current-mode analogue signal processing

1990 ◽  
Vol 137 (2) ◽  
pp. 61 ◽  
Author(s):  
Chris Toumazou ◽  
John Lidgey ◽  
Brett Wilson
Keyword(s):  
Signal Processing ◽  
Current Mode ◽  
Analogue Signal

EFFECT OF CELLULAR MEMBRANE RESISTIVITY INHOMOGENEITY ON THE THERMAL NOISE-LIMIT

2015 ◽  
Vol 11 (3) ◽  
pp. 3171-3183
Author(s):  
Gyula Vincze
Keyword(s):  
Field Strength ◽  
Thermal Noise ◽  
Cellular Membrane ◽  
Thermal Limit ◽  
Low Frequencies ◽  
Membrane Resistivity ◽  
Noise Limit ◽  
The Asymmetry ◽  
Characteristic Field

Our objective is to generalize the Weaver-Astumian (WA) and Kaune (KA) models of thermal noise limit to the case ofcellular membrane resistivity asymmetry. The asymmetry of resistivity causes different effects in the two models. In the KAmodel, asymmetry decreases the characteristic field strength of the thermal limit over and increases it below the breakingfrequency (10  m), while asymmetry decreases the spectral field strength of the thermal noise limit at all frequencies.We show that asymmetry does not change the character of the models, showing the absence of thermal noise limit at highand low frequencies in WA and KA models, respectively.

scholarly journals Nano-Kelvin Thermometry and Temperature Control: Beyond the Thermal Noise Limit

2014 ◽  
Vol 112 (16) ◽  
Author(s):  
Wenle Weng ◽  
James D. Anstie ◽  
Thomas M. Stace ◽  
Geoff Campbell ◽  
Fred N. Baynes ◽  
...  
Keyword(s):  
Temperature Control ◽  
Thermal Noise ◽  
Noise Limit

Thermal noise limit in measuring the gravitational constant G using the angular acceleration method and the dynamic deflection method

2013 ◽  
Vol 377 (21-22) ◽  
pp. 1397-1401 ◽  
Author(s):  
Jie Luo ◽  
Cheng-Gang Shao ◽  
Yuan Tian ◽  
Dian-Hong Wang
Keyword(s):  
Thermal Noise ◽  
Gravitational Constant ◽  
Angular Acceleration ◽  
Noise Limit ◽  
Acceleration Method

scholarly journals Signal Processing Technique for Time Domain Measurement of S-Parameters

2016 ◽  
Vol 15 (2) ◽  
pp. 105-114 ◽  
Author(s):  
Isabela M. Nobre ◽  
Julio L. Nicolini ◽  
Joaquim D. Garcia ◽  
Marbey Mosso
Keyword(s):  
Signal Processing ◽  
Time Domain ◽  
Processing Technique ◽  
Signal Processing Technique ◽  
S Parameters

scholarly journals Novel Algorithm for Sample Material Parameter Determination using THz Time-Domain Spectrometer Signal Processing

2014 ◽  
Vol 486 ◽  
pp. 012018 ◽  
Author(s):  
Kirill I Zaytsev ◽  
Arseniy A Gavdush ◽  
Sergey P Lebedev ◽  
Stanislav O Yurchenko
Keyword(s):  
Signal Processing ◽  
Time Domain ◽  
Material Parameter ◽  
Parameter Determination ◽  
Sample Material ◽  
Novel Algorithm
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