Low-Pass NGD Voice Signal Sensoring With Passive Circuit

Wan, Fang; Yuan, Zhongzhu; Ravelo, Blaise; Ge, Jingpeng; Rahajandraibe, Wenceslas

doi:10.1109/jsen.2020.2976531

Cited by 10 publications

(12 citation statements)

References 35 publications

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“…The proposed resistorless BP NGD topology is potentially useful to avoid the attenuation loss induced by the resistor component. As proposed in [38][39][40], the main applications NGD circuit is the equalization of signal delay or the correction of the signal synchronization in multi-port electronic sensors. An example of sensor signal prediction from mechanical actions which can be extended to megahertz frequency range is demonstrated in reference [40].…”

Section: Discussionmentioning

confidence: 99%

Bandpass NGD TAN of Symmetric H-Tree With Resistorless Lumped-Network

et al. 2021

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This paper introduces an innovative passive topology of bandpass (BP) negative group delay (NGD) electrical circuit implemented with symmetric H-tree network. The multi-port topology of BP NGD circuit is originally represented by a resistorless H-tree constituted by lumped LC-passive network. Until now, the NGD electronic circuits available in the literature are implemented by two-port circuits which are using either resistive elements or distributed microstrip topologies. In the present investigation, the feasibility of the modelling, design, fabrication and test of unfamiliar BP NGD original H-tree circuits. The main objective of the study is to identify analytically the existence of the BP NGD function with the resistorless H-tree circuit. Because of its simplicity and the analytical equation compactness, the uncommon approach of tensorial analysis of networks (TAN) is used in the paper. After the branch and mesh analyses, the impedance matrix of the resistorless H-tree is elaborated. Hence, the resistorless H-tree equivalent Smatrix is established by means of impedance to scattering matrix transform. The BP NGD analysis in function of the inductance and capacitance parameters constituting the H-tree circuit is presented. Then, the main steps of the BP NGD investigation are described. The existence of BP NGD behavior in function of the adequate transmission parameters is identified by the consideration of the canonical form. To validate the BP NGD behavior, a proof of concept (POC) of LC-network based resistorless and symmetrical tree prototype is designed, fabricated and measured. Comparison results between well-correlated TAN calculation, simulation and experimentation are discussed. INDEX TERMS Tensorial analysis of networks (TAN), Kron's formalism, Bandpass negative group delay (NGD), resistorless topology, lumped H-tree, symmetric multi-port circuit, S-parameter modeling, LCnetwork passive circuit.

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Section: Discussionmentioning

confidence: 99%

Bandpass NGD TAN of Symmetric H-Tree With Resistorless Lumped-Network

et al. 2021

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“…Because the SC0073 B pulse sensor is very sensitive, the external high-frequency disturbance greatly interferes with the pulse signal. Hence, this paper adds a low-pass filter circuit to the hardware system [9]. e additional highfrequency disturbance signals can be filtered out by effective RC combination.…”

Section: Signal Low-pass Filtering and Amplification Modulementioning

confidence: 99%

Psychological Stress Detection and Early Warning System Based on Wireless Network Transmission

2021

Scientific Programming

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To improve the accuracy of stress detection and stress warning errors, this paper designed a new psychological stress detection and warning system based on wireless network transmission. To achieve this objective, we established a real-time setup. The hardware of the system is composed of pulse acquisition module, signal low-pass filtering and amplification module, real-time clock module, wireless network transmission module, and power supply module, respectively. Based on the aforementioned hardware platform, the system software is designed, mainly through the construction of pulse signal noise and the use of wavelet denoising threshold for sensing wavelet packet inverse transformation, to get the reconstructed signal. The peak point of the reconstructed signal is determined, and the value of pulse signal is extracted. According to the characteristic value’s extraction results, the degree of psychological stress is quantified using the psychological stress index (PSI). When the PSI exceeds a predefined threshold, it indicates an early warning of psychological stress. The experimental results show that the psychological stress detection of our system is consistent with the expert evaluation results, the warning time is short, and the practical application effect is good.

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“…9 Emphatically, different classes of NGD circuits were proposed and expected to be commonly and conventionally used by the non-familiar and non-specialist engineers in the future. Following the innovative concept, a class of low-pass (LP) NGD function was approved by passive [10][11][12][13][14] and active [15][16][17][18] circuit studies.…”

Section: Introductionmentioning

confidence: 99%

“…Compact NGD circuits were designed in microstrip technology. 19,20 However, nowadays, the existing NGD electronic circuits [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] are generally designed with centimeter or decimeter size ranges. To overcome the size limitation bottleneck, we would like to develop a design method of NGD integrated circuit (IC) in CMOS technology similar to the classical electronic functions as frequency synthesizer 21 and transceiver devices.…”

Section: Introductionmentioning

confidence: 99%

130‐nm BiCMOS design of low‐pass negative group delay integrated RL‐circuit

Ravelo

Rahajandraibe

Guérin

et al. 2022

Circuit Theory & Apps

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A design method of low-pass (LP) negative group delay (NGD) integrated circuit (IC) implemented in 130-nm BiCMOS technology is investigated. The LP-NGD circuit is composed by RL-network with BiCMOS high Ohmic unsalicided N+poly resistor and symmetrical high current spiral inductor. The design methodology of the investigated LP-NGD circuit is explained by chip layout process. Then, the pre-simulation is performed with the design rule check (DRC) and 225 μm Â 215 μm layout versus schematic (LVS) approaches. The LP-NGD design feasibility of the BiCMOS IC implementation is validated by AC frequency domain simulation with realistic component implementation constraints. As expected, the ideally calculated and simulated results show NGD of about À100 ps with 1.12 GHz cut-off frequency and À6 dB attenuation. Moreover, the LP-NGD function is also verified with transient analyses with Gaussian pulse and arbitrary waveform signals. As expected, despite the attenuation, the output signal leading and tailing edges appear in time-advance of about À100 ps compared to the input ones. K E Y W O R D S 130-nm BiCMOS technology, design method, low-pass (LP) NGD integrated circuit (IC), negative group delay (NGD), RL-network passive topology

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Low-Pass NGD Voice Signal Sensoring With Passive Circuit

Cited by 10 publications

References 35 publications

Bandpass NGD TAN of Symmetric H-Tree With Resistorless Lumped-Network

Bandpass NGD TAN of Symmetric H-Tree With Resistorless Lumped-Network

Psychological Stress Detection and Early Warning System Based on Wireless Network Transmission

130‐nm BiCMOS design of low‐pass negative group delay integrated RL‐circuit

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