基于改进开关型OTA的低压低功耗ΣΔ调制器

发布时间：2018-04-24 15:01

本文选题：ΣΔ调制器 + 数据转换器　；参考：《微电子学与计算机》2017年09期

【摘要】：设计了一种应用于音频的5阶离散时间单环单比特量化ΣΔ调制器.提出一种改进的开关型AB类运算跨导放大器(OTA)电路,实现了低电压下积分器的低功耗和高转换速率.OTA仅在半时钟周期工作,有效降低调制器功耗.电路采用TSMC 0.18μm 1P4M标准CMOS工艺实现,后仿真结果表明,无杂散动态范围(SFDR)和信号噪声失真比(SNDR)分别达97.6dB和87.3dB,调制器版图面积0.4mm2.在1V电源电压下,消耗电流260μA,品质因数(FoM)达到286fJ/c-step,实现了低压低功耗高精度的设计目标.
[Abstract]:A 5 order discrete time single ring single bit quantization 危螖 modulator for audio frequency is designed. An improved switch type AB operational transconductance amplifier (OTAA) circuit is proposed, which realizes the low power consumption and high conversion rate of the integrator at low voltage. The OTA only works in the half-clock cycle, which effectively reduces the power consumption of the modulator. The circuit is implemented by TSMC 0.18 渭 m 1P4M standard CMOS process. The post-simulation results show that the non-spurious dynamic range (SFDR) and the signal-noise-to-distortion ratio (SRR) are up to 97.6dB and 87.3 dB, respectively, and the modulator layout area is 0.4mm ~ 2. At 1 V power supply, the consumption current is 260 渭 A, the quality factor is up to 286 fJ / c step, and the design goal of low voltage, low power and high precision is realized.
【作者单位】：中国科学院上海高等研究院;中国科学院大学;中国科学院红外成像材料与器件重点实验室;
【基金】：红外成像材料与器件重点实验室开放基金对本课题资助
【分类号】：TN761

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