Effect of a Low-Frequency Noise Signal on the Supply Circuit of the Millimeter-Band Generator of Single-Frequency and Chaotic Oscillations Designed on an Avalanche Transit-Time Diode

2018 ◽  
Vol 63 (10) ◽  
pp. 1191-1196 ◽  
Author(s):  
E. A. Myasin ◽  
V. D. Kotov
Keyword(s):  
Transit Time ◽  
Low Frequency ◽  
Noise Signal ◽  
Single Frequency ◽  
Frequency Noise ◽  
Low Frequency Noise ◽  
Chaotic Oscillations ◽  
Supply Circuit

Adaptive Active Control System of Vehicle Noise Design and Test

2014 ◽  
Vol 1028 ◽  
pp. 251-256 ◽  
Author(s):  
Ji Guang Jiang ◽  
Yue Zeng
Keyword(s):  
Active Noise Control ◽  
Low Frequency ◽  
Control Unit ◽  
Noise Signal ◽  
Frequency Noise ◽  
Low Frequency Noise ◽  
Power Module ◽  
Vehicle Interior ◽  
Vehicle Noise ◽  
Active Noise

According to the vehicle interior low frequency noise existing, vehicle interior adaptive active noise control strategy is established based on the FXLMS algorithm, designed the core circuit module active noise controller, including the vehicle interior noise signal amplification module, a main control unit, audio power amplifier module and power module, completed development of the controller hardware, and programming the control software system; using this system, on vehicle driving conditions vice driver left ear position low frequency noise cancellation control in the steady state, the 8.5 dB (Lin) and 10.2dB (Lin) the amount of noise reduction.

scholarly journals Noise Measurements Of Resistors With The Use Of Dual-Phase Virtual Lock-In Technique

2015 ◽  
Vol 22 (4) ◽  
pp. 503-512
Author(s):  
Adam Witold Stadler ◽  
Andrzej Kolek ◽  
Zbigniew Zawiślak ◽  
Andrzej Dziedzic
Keyword(s):  
Noise Suppression ◽  
Excitation Frequency ◽  
Low Frequency ◽  
Noise Signal ◽  
Low Noise ◽  
Frequency Noise ◽  
Dual Phase ◽  
Low Frequency Noise ◽  
Electronic Components ◽  
Lock In

Abstract Measurement of low-frequency noise properties of modern electronic components is a very demanding challenge due to the low magnitude of a noise signal and the limit of a dissipated power. In such a case, an ac technique with a lock-in amplifier or the use of a low-noise transformer as the first stage in the signal path are common approaches. A software dual-phase virtual lock-in (VLI) technique has been developed and tested in low-frequency noise studies of electronic components. VLI means that phase-sensitive detection is processed by a software layer rather than by an expensive hardware lock-in amplifier. The VLI method has been tested in exploration of noise in polymer thick-film resistors. Analysis of the obtained noise spectra of voltage fluctuations confirmed that the 1/f noise caused by resistance fluctuations is the dominant one. The calculated value of the parameter describing the noise intensity of a resistive material, C = 1·10−21 m3, is consistent with that obtained with the use of a dc method. On the other hand, it has been observed that the spectra of (excitation independent) resistance noise contain a 1/f component whose intensity depends on the excitation frequency. The phenomenon has been explained by means of noise suppression by impedances of the measurement circuit, giving an excellent agreement with the experimental data.

Estimating the Quality of Thermionic Cathodes for Microwave Vacuum Tubes Using the Low-Frequency Noise Parameters

Vestnik MEI ◽  
2018 ◽  
Vol 5 (5) ◽  
pp. 120-127
Author(s):  
Mikhail D. Vorobyev ◽  
◽  
Dmitriy N. Yudaev ◽  
Andrey Yu. Zorin ◽  
◽  
...  
Keyword(s):  
Low Frequency ◽  
Frequency Noise ◽  
Low Frequency Noise ◽  
Noise Parameters ◽  
Thermionic Cathodes ◽  
Vacuum Tubes

Simulation of Low Frequency Noise in a CCTWT

1999 ◽  
Author(s):  
Charles K. Birdsall ◽  
J. P. Varboncoeur ◽  
P. J. Christensen
Keyword(s):  
Low Frequency ◽  
Frequency Noise ◽  
Low Frequency Noise

Impacts of low-frequency noise from industrial sources in residential areas

2021 ◽  
Vol 182 ◽  
pp. 108203
Author(s):  
Lígia T. Silva ◽  
Alda Magalhães ◽  
José Ferreira Silva ◽  
Fernando Fonseca
Keyword(s):  
Low Frequency ◽  
Frequency Noise ◽  
Low Frequency Noise ◽  
Residential Areas ◽  
Industrial Sources
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