公开(公告)号：US20100102875A1

公开(公告)日：2010-04-29

申请号：US12578569

申请日：2009-10-13

Applicant: Hongwei Zhao ,  Jian Yang ,  Iven Zheng ,  Tommy Mao ,  Waley Li

Inventor： Hongwei Zhao ,  Jian Yang ,  Iven Zheng ,  Tommy Mao ,  Waley Li

IPC: G05F1/10 ,  H01L27/06

CPC classification number: H01L27/0207 ,  H01L27/0623

Abstract: A method for passive cancellation of substrate noise for a buck converter uses an on-chip capacitor to reduce the substrate noise. The capacitor achieves a close-magnitude noise with opposite phase for better noise cancellation effect in the substrate. The capacitor can be realized as a MOS capacitor, NMOS isolation ring n-well capacitor, n-well junction capacitor, isolated p-well junction capacitor, etc. The capacitor is easy to implement. Further, bond wire parasitic inductance in the buck converter is used to reduce substrate noise.

Abstract translation: 用于降压转换器的基板噪声的被动消除方法使用片上电容器来降低衬底噪声。 电容器实现了具有相反相位的近似噪声，从而在衬底中获得更好的噪声消除效果。 电容器可以实现为MOS电容器，NMOS隔离环n阱电容器，n阱结电容器，隔离p阱结电容器等。电容器易于实现。 此外，降压转换器中的接合线寄生电感用于降低基板噪声。