Active substrate noise suppression in mixed-signal circuits using on-chip driven guard rings

W. Winkler, F. Herzel
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引用次数: 19

Abstract

This paper presents an active substrate noise suppression circuit using a pair of concentric guard rings. The outer guard ring senses the substrate noise, which is inverted and amplified by a SiGe circuit. This on-chip amplifier drives the inner guard ring such that efficient noise cancellation is achieved. A ring oscillator is used to sense the residual substrate noise. The measured noise suppression bandwidth is as high as 400 MHz.
利用片上驱动保护环抑制混合信号电路中的有源衬底噪声
本文提出了一种采用一对同心保护环的有源衬底噪声抑制电路。外保护环检测衬底噪声,该噪声由SiGe电路反转和放大。片上放大器驱动内保护环,从而实现有效的噪声消除。环形振荡器用于检测残余衬底噪声。测量到的噪声抑制带宽高达400mhz。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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