Title: An Active Guarding Circuit Design for Wideband Substrate Noise Suppression
Authors: Chao, Hao-Ming ×
Wuen, Wen-Shen
Wen, Kuei-Ann #
Issue Date: Nov-2008
Publisher: Professional Technical Group on Microwave Theory and Techniques, Institute of Electrical and Electronics Engineers
Series Title: IEEE Transactions on Microwave Theory and Techniques
Abstract: In this paper, an active guarding circuit is presented for wideband substrate noise suppression. A feed-forward compensation mechanism is proposed to extend the noise suppression bandwidth and to adjust the amplitude of phase-inversed noise cancellation current by introducing a zero and an amplitude controller. A noise decoupling mechanism is developed to provide a decoupling path and to sense the noise level for generating noise cancellation current. With substrate characterization, parameters of substrate network impedance, decoupling factor and amplitude of noise cancellation current can be either obtained or determined. The active guarding circuit is implemented in 90nm CMOS process based on substrate characterization. The measured substrate noise suppression is better than -9dB from DC to 250MHz. The -3dB suppression bandwidth is effectively extended to 1.2GHz. The power consumption and circuit area are 2.5mW and 20um x 41um, respectively.
ISSN: 0018-9480
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Non-KU Leuven Association publications
× corresponding author
# (joint) last author

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