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An active guarding circuit design for wideband substrate noise suppression
- Source :
- IEEE Transactions on Microwave Theory and Techniques. Nov, 2008, Vol. 56 Issue 11, p2609, 11 p.
- Publication Year :
- 2008
-
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 a 90-nm CMOS process based on substrate characterization. The measured substrate noise suppression is better than -9 dB from dc to 250 MHz. The -3-dB suppression bandwidth is effectively extended to 1.2 GHz. The power consumption and circuit area are 2.5 mW and 20 [micro]m x 41 [micro]m, respectively. Index Terms--Analog circuits, CMOS integrated circuits (ICs), substrate coupling noise, substrate crosstalk, substrate isolation.
- Subjects :
- Complementary metal oxide semiconductors -- Design and construction
Circuit design -- Evaluation
Analog integrated circuits -- Design and construction
Semiconductor wafers -- Design and construction
Noise control -- Methods
Circuit designer
Integrated circuit design
Business
Computers
Electronics
Electronics and electrical industries
Subjects
Details
- Language :
- English
- ISSN :
- 00189480
- Volume :
- 56
- Issue :
- 11
- Database :
- Gale General OneFile
- Journal :
- IEEE Transactions on Microwave Theory and Techniques
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.189653387