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Use of differently delayed feedback to suppress metastability in noise shaping control loops
Use of differently delayed feedback to suppress metastability in noise shaping control loops
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机译:使用不同延迟的反馈来抑制噪声整形控制环路中的亚稳定性
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摘要
Described herein is a ΣΔ modulator with improved metastability in which the control loop remains stable. In one embodiment, the ΣΔ modulator utilizes differently delayed feedback to successive integrators of the control loop to suppress metastability errors without compromising the stability of the control loop. This is accomplished by including one or more quantizers in the control loop. This technique may be applied to control loops of at least second order, i.e., having two or more integrator stages, where at least one feedback term after the first is non-zero.
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