Design and implementation of higher order sigma delta modulator circuits using FPAA

Roel, Daisy Deenrii; Kumar, Manoj

doi:10.1007/s10470-020-01667-0

Cited by 5 publications

(3 citation statements)

References 14 publications

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“…The multiplication factor of Y(z) is called the signal transfer function (STF)and of Q(z) called the noise transfer function (NTF). From the above equation, higher order modulators push more noise power outside the signal band [24]. The proposed 2 nd order modulator architecture is based on Cascade of integrator with Feed-Forward (CIFF) topology, Hence it has L =2, resonator coefficients have zero value (g= 0).…”

Section: Incremental Converter Design Architecture's and Their Perfor...mentioning

confidence: 99%

10-Bit 200 kHz/8-Channel Incremental ADC for Biosensor Applications

Gupta¹,

Earnest²,

Mitra³

2022

J CIRCUIT SYST COMP

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In this paper, a second-order discrete-time (DT) modulator for 8-channel Incremental Sigma-Delta analog-to-digital converter (IADC) is presented for biomedical applications ranging from kHz. The proposed DT modulator with input bandwidth of 25[Formula: see text]kHz on each channel is sampled at 51.2[Formula: see text]MHz, with oversampling ratio of 128 implemented at 180[Formula: see text]nm technology. The proposed IADC has high resolution, multichannel A/D conversion, simple architecture, low offset, low gain error and low area over the standard ADCs available. Measured results show that the SNR, DR, ENOB, power consumption and chip area of the proposed IADC are 63.9[Formula: see text]dB, 62.2[Formula: see text]dB, 10.11 bits, 0.832[Formula: see text]mW and 0.032[Formula: see text]mm2, respectively, at 1.8V power supply. For testing purpose, the noncoherent sampling is done to get the FFT plot of the output signal. For further validation, the proposed second-order IADC was also designed and compared in MATLAB/Simulink.

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Section: Incremental Converter Design Architecture's and Their Perfor...mentioning

confidence: 99%

10-Bit 200 kHz/8-Channel Incremental ADC for Biosensor Applications

Gupta¹,

Earnest²,

Mitra³

2022

J CIRCUIT SYST COMP

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show abstract

“…The comparison is enabled not only between P Δ ADC families but also with Nyquist rate (NR) ADC's by considering various performance parameters. Specifications to physical implementation of P Δ ADC are tedious task which requires good knowledge of EDA tools and hardware devices for prototyping and verification (Roel and Kumar, 2020). The following paragraph enlights the performance parameter comparison of P Δ ADC with other types of ADC's.…”

Section: Ijius 111 48mentioning

confidence: 99%

A novel system-level modeling and design approach for high performance single-loop sigma-delta (∑Δ) modulators

Krishna

Reddy²,

Reddy

2021

IJIUS

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Purpose This paper attempted a novel approach for system-level modeling and simulation of sigma-delta modulator for low-frequency CMOS integrated analog to digital interfaces. Comparative analysis of various architectures topologies, circuit implementation techniques are described with analytical procedure for effective selection of topologies for targeted specifications. Design/methodology/approach Virtual instruments are presented in labview environment to analyze the correlation of circuit-level non-ideal effects with key design parameters over sampling ratio, coarse quantizer bits and loop filter order. A fourth-order single-loop sigma-delta modulator is designed and verified in MATLAB simulink environment with careful selection of integrator weights to meet stable desired performance. Findings The proposed designed achieved SNDR of 122 dB and 20 bit resolution satisfying high-resolution requirements of low-frequency biomedical signal processing applications. Even though the simulation performed at behavioral level, the results obtained are considered as accurate, by including all non-ideal and non-linear circuit errors in simulation process. Originality/value Virtual instruments using labview environment used to analyze the correlation of circuit-level non-ideal effects with key design parameters over sampling ratio, coarse quantizer bits and loop filter order for accurate design.

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“…Plenty of studies used FPAA chips developed by Anadigm Company and focused on the applications in control and measurement systems, audio signal processing, and biomedical signal processing 26 , 27 . With its upper-level AnadigmDesigner2 development software, designers can use the functional configurable analogue module (CAM) to code complex simulation functions.…”

Section: Introductionmentioning

confidence: 99%

Haptic virtual surgery simulation system under field programmable analogue array-based hybrid control

Sun

Yang

Zhang

et al. 2022

Sci Rep

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In this paper, a bilateral haptic virtual surgery simulation system under a hybrid controller was studied. An analogue controller realized by a field programmable analogue array (FPAA) was paralleled in the operator robot side, which reduced the impact of controller discretisation on the system. A system stability conditions under hybrid control with multiple-operators were deduced. The stability analysis indicates that the addition of analogue derivative term widens the range of haptic controls gains that satisfy the multiple-users’ stability conditions. Finally, the human’s performance of a stiffness discrimination task was studied in an independently developed minimally invasive surgical (MIS) platform. The experiment results show that, human operators under the hybrid controller achieve the highest task success rates.

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Design and implementation of higher order sigma delta modulator circuits using FPAA

Cited by 5 publications

References 14 publications

10-Bit 200 kHz/8-Channel Incremental ADC for Biosensor Applications

10-Bit 200 kHz/8-Channel Incremental ADC for Biosensor Applications

A novel system-level modeling and design approach for high performance single-loop sigma-delta (∑Δ) modulators

Haptic virtual surgery simulation system under field programmable analogue array-based hybrid control

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