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A High-Performance Closed-loop Fourth-Order Sigma-Delta Micro-machined Accelerometer

机译:高性能闭环第四阶Sigma-Delta微加速度计

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In this paper a high-performance closed-loop fourth-order sigma-delta (Σ?) micro-accelerometer is presented. After a introduction of sigma-delta accelerometer, system-level analysis and design of a fourth-order sigma-delta micro-accelerometer is given. The simulation result shows that an accelerometer with 107dB signal to noise ratio (SNR) and 17.5 bits effective number of bits (ENOB) is achieved. Through the root locus analysis, it is got that accelerometer is stable when quantization gain is bigger than 0.262. The accelerometer gets a good linearity and it becomes overload when input signal level is greater than -5dBFS.
机译:在本文中,提出了一种高性能闭环第四阶Sigma-Delta(σ≤)微观加速度计。在引入Sigma-Delta加速度计后,给出了第四阶Sigma-Delta微观加速度计的系统级分析和设计。仿真结果表明,实现了具有107dB信号与噪声比(SNR)和17.5位有效数量(ENOB)的加速度计。通过根轨迹分析,当量化增益大于0.262时,它必须稳定加速度计是稳定的。加速度计可获得良好的线性度,当输入信号电平大于-5dBF时,它变得过载。

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