连续时间σ δ调制器的过载分析

2015 IEEE 58th International Midwest Symposium on Circuits and Systems (MWSCAS) Pub Date : 2015-10-01 DOI:10.1109/MWSCAS.2015.7282163

Kyung Kang, P. Stubberud

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引用次数: 0

摘要

连续时间σ δ调制器(CT ΣΔM)过载时，当ΣΔM的输入功率超过一定值时，其输出信噪比(SQNR)降低。在本文中，确定了导致CT ΣΔM过载的量化器增益范围，并使用该范围的值来确定防止过载的最大输入信号功率。为了验证预测的防止过载的最大输入功率，模拟了2到5阶CT ΣΔMs。

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Overload analysis of continuous time sigma delta modulators

When a continuous time sigma delta modulator (CT ΣΔM) is overloaded, its output signal to quantization noise ratio (SQNR) decreases when the ΣΔM's input power is increased over a certain value. In this paper, the range of quantizer gains that cause a CT ΣΔM to overload is determined, and this range of values is used to determine the maximum input signal power that prevents overload. To validate the predicted maximum input power that prevents overload, 2nd through 5th order CT ΣΔMs are simulated.

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2015 IEEE 58th International Midwest Symposium on Circuits and Systems (MWSCAS)

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