An Improved Digital Decimation Filter for Sigma-Delta ADC

Hao, Zhi-gang; Yang, Hong-Kui; Zhang, Chong; Wu, Qing; Yin, Tongming

doi:10.3724/sp.j.1146.2009.00247

Cited by 3 publications

(1 citation statement)

References 6 publications

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“…The integrator can be seen as a low-pass filter and has −6 dB inhibitory ability for noise. The integrator transmits the output data to the 1-bit A/D converter, the A/D converter outputs the 0 and 1 bit stream, the bit stream transmit back to the differential amplifier through the 1-bit D/A converter [5]. The first-order Δ-Σ modulation principle block diagram is shown in Fig.…”

Section: δ-σ Modulation Principlementioning

confidence: 99%

Design and Implementation of a PMSM Rotor Position Detecting System with High Speed and High Precision

Zhu

Zhao

Zhu

et al. 2015

Proceedings of the 2015 Chinese Intelligent Automation Conference

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To solve the problem of detecting motor rotor position accurately of the Permanent Magnet Synchronous Motor (PMSM), this paper designs and realizes a method of demodulating the signal of PMSM rotor position based on Δ-Σ modulation and Cascade Integrator Comb (CIC) filter. This method uses Δ-Σ modulation chip ADS1205 and specially designed filter chip AMC1210 for motor control. With the combination of ADS1205 and AMC1210, the PMSM rotor position information is demodulated, and the 16-bit demodulated angle data are got. The actual system validation shows that the decoding circuits have high precision, PMSM can be stable and reliable when running at 10,000 RPM, proving the feasibility of the design. Compared with the conventional A/D sampling method, this method is more stable and reliable, cheaper, and has higher signal-to-noise ratio.

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Section: δ-σ Modulation Principlementioning

confidence: 99%