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首页> 外文期刊>IEEE Journal of Solid-State Circuits >An eighth-order bandpass /spl Delta//spl Sigma/ modulator for A/D conversion in digital radio
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An eighth-order bandpass /spl Delta//spl Sigma/ modulator for A/D conversion in digital radio

机译:用于数字无线电中A / D转换的八阶带通/ spl Delta // spl Sigma /调制器

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This paper examines the design and implementation of an eighth-order bandpass delta-sigma modulator. The design process is investigated from the signal flow graph level, through to the details of the switched capacitor implementation and layout considerations. Simulation results, highlighting the effects of process variation, are provided and the experimental performance of the modulator described. The modulator is implemented in a 0.8-/spl mu/m BiCMOS process and occupies an active area of 1.7 mm/sup 2/. Operating from /spl plusmn/2.5-V supplies, the fabricated prototype exhibits stable behaviour and achieves a dynamic range of 67 dB over a 200-kHz bandwidth centered at the commonly used intermediate frequency of 10.7 MHz. This paper, therefore, demonstrates the viability of high-order single-bit bandpass delta-sigma modulation.
机译:本文研究了八阶带通Δ-Σ调制器的设计和实现。从信号流图级别到开关电容器实现的详细信息和布局注意事项,研究了设计过程。提供了强调过程变化影响的仿真结果,并描述了调制器的实验性能。该调制器以0.8- / splμm/ m的BiCMOS工艺实现,占用的有效面积为1.7 mm / sup 2 /。使用/ spl plusmn / 2.5V电源工作时,所制造的原型具有稳定的性能,并在以常用的10.7 MHz中频为中心的200kHz带宽上实现了67dB的动态范围。因此,本文证明了高阶单位带通Δ-Σ调制的可行性。

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