A 0 . 9V 60-� W 1-Bit Fourth-Order Delta-Sigma Modulator With 83-dB Dynamic Range
A 0 . 9V 60-� W 1-Bit Fourth-Order Delta-Sigma Modulator With 83-dB Dynamic Range
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具有 83dB 动态范围的 0.9V 60W 1 位四阶 Delta-Sigma 调制器
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
Jong
中科院分区：
文献类型：
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作者：
J. Roh;S. Byun;Youngkil Choi;H. Roh;Yi;Jong
采用标准CMOS0.13M工艺设计了一款0.9V 60W的Delta-sigma调制器。该调制器在信号带宽为20 kHz、采样频率为2 MHz的情况下实现了83dB的动态范围。输入前馈结构用于减小积分器的电压摆幅，从而实现低功耗放大器。针对调制器结构的特点，设计了低静态运算跨导放大器，采用正反馈的方式来提高直流增益。所设计的调制器在最先进的亚1-V调制器中显示出很高的品质因数。
A 0.9-V 60W delta-sigma modulator is designed using standard CMOS 0.13m technology. The modulator achieves 83-dB dynamic range in a signal bandwidth of 20 kHz with a sampling frequency of 2 MHz. The input-feedforward architecture is used to reduce the voltage swing of the integrators, which enables low-power amplifiers. By considering the characteristics of the modulator architecture, low-quiescent operational transconductance amplifiers are designed, which use positive feedback to increase dc gain. The designed modulator shows very high figure of merit among the state-of-the-art sub-1-V modulators.