Design of Multi-Scale Negative Group Delay Circuit for Sensors Signal Time-Delay Cancellation

Wan, Fang; Miao, Xiang; Ravelo, Blaise; Yuan, Qingyun; Cheng, Jing; Ji, Qizheng; Ge, Jingpeng

doi:10.1109/jsen.2019.2921834

Cited by 35 publications

(19 citation statements)

References 32 publications

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“…With the development of the negative group delay circuit (NGDC), it provides a new idea to achieve GD equalization that is utilizing the negative GD to cancel the positive GD [21], [22]. Based on this thought, the NGDCs have been applied in increasing the bandwidth and the efficiency of the amplifiers [23], [24], eliminating the beam squint in the serially fed antenna array [25], improving the signal integrity [26], and realizing signal synchronization [27]. But it has not been used in the design of the linear-phase BPF.…”

Section: Introductionmentioning

confidence: 99%

A Full-Passband Linear-Phase Band-Pass Filter Equalized With Negative Group Delay Circuits

et al. 2020

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A full-passband linear-phase band-pass filter (BPF) equalized with negative group delay circuits (NGDC) is proposed. The NGDCs are utilized to suppress the salient group delay at the edge of the passband of the traditional BPF for achieving the full-passband linear-phase characteristic. To obtain input-and output-port impedance matching, two BPFs loading NGDCs are center symmetrically configured by Wilkinson power dividers. To verify the design concept, a 3-order full-passband linear-phase BPF is designed and fabricated. From the measured results, the GD fluctuation is reduced by 74% from 0.57 to 0.15 ns, return loss is better than 10 dB, and the insertion loss variation is less than 3 dB within the frequency range from 2.142 to 2.804 GHz. The proposed BPF achieves a flat group delay in the whole passband and realizes the full-passband linear-phase characteristic. INDEX TERMS Band-pass filter, full-passband linear phase, group delay equalization, negative group delay circuits.

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Section: Introductionmentioning

confidence: 99%

A Full-Passband Linear-Phase Band-Pass Filter Equalized With Negative Group Delay Circuits

et al. 2020

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“…Moreover, an example of rotating motion sensing signal reconstruction shows the feasibility of the NGD reconstruction technique. Of course, the proposed reconstruction technique can be transposed to high-, medium and low-speed sensors knowing the feasibility of NGD circuits designability as reported in [36].…”

Section: Discussionmentioning

confidence: 99%

“…A canonical form of low-pass NGD function was stated [35]. The feasibility of low-pass NGD function in multiscale time range was demonstrated [36]. The NGD function can be intended to correct the degradation affecting the sensor signals by improving the time parameters as noticed in [37].…”

Section: Introductionmentioning

confidence: 99%

Reconstruction Technique of Distorted Sensor Signals with Low-Pass NGD Function

et al. 2020

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This paper develops a new reconstruction technique of undesirable signal distortion generated by sensor electronic circuits. The introduced reconstruction technique is originally realized with unfamiliar low-pass negative group delay (NGD) function. The feasibility condition of the proposed reconstruction technique in function of the sensor signal spectrum bandwidth under consideration is elaborated. The reconstruction technique principle is theoretically introduced by means of identification of low-pass NGD function parameters and the appropriated circuit topology. The unfamiliar low-pass NGD function analysis and synthesis equations are established. As an example, for the feasibility study, an RC-network based low-pass active cell is considered to implement the low-pass NGD function. A design method of NGD circuit in function of the sensor distortion transfer function is described in different successive steps. The developed NGD reconstruction technique is validated by different proofs of concept. First, transient simulations are carried out with Gaussian and sinc analytical signals. Then, experimental feasibility study is also performed with arbitrary waveform signal. As expected, the NGD reconstruction technique efficiency is confirmed with improvement of distorted signal integrity parameters and cross correlation better than 97%.

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“…Furthermore, FET-based NGD circuits present a systematical sign inversion of output voltage compared to the input. To overcome the bias and access matching network design complexity, NGD topologies were proposed replacing the FET by low noise amplifier (LNA) [11][12][13][14][15]. The alternative LNA-based NGD topology is expected to present considerable advantages like design simplicity.…”

Section: Introductionmentioning

confidence: 99%

Study of Active Negative Group Delay Circuit Based on Lna and RLC-Parallel Network

Chen¹,

Gu²,

Zhou³

et al. 2021

PIER Letters

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This paper develops a circuit theory on bandpass negative group delay (NGD) topology. The NGD active lumped circuit uses a low noise amplifier (LNA). An S-parameter model is formulated. Unfamiliar, NGD function analysis is introduced by analytically defining the NGD value, bandwidth, and central frequency as a function of the topology parameters. The synthesis formulas enabling the calculation of cell parameters as a function of the targeted bandpass function specifications. To validate the circuit theory, an NGD proof of concept (PoC) is designed, simulated, and tested. As expected, simulations and measurements are in good agreement. Calculated model, simulated and measured results showing NGD level of about −10 ns around the centre frequency 0.5 GHz over the bandwidth 50 MHz validate are obtained.

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Design of Multi-Scale Negative Group Delay Circuit for Sensors Signal Time-Delay Cancellation

Cited by 35 publications

References 32 publications

A Full-Passband Linear-Phase Band-Pass Filter Equalized With Negative Group Delay Circuits

A Full-Passband Linear-Phase Band-Pass Filter Equalized With Negative Group Delay Circuits

Reconstruction Technique of Distorted Sensor Signals with Low-Pass NGD Function

Study of Active Negative Group Delay Circuit Based on Lna and RLC-Parallel Network

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