Guard ring diodes for suppression of substrate noise and improved reliability in mixed-mode CMOS circuits
- 19 November 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 145-148
- https://doi.org/10.1109/ipfa.1995.487613
Abstract
Forward biased n/sup +/ guard ring diodes are used to generate a relatively large on-chip capacitance. This variable capacitance is resonated with the normal substrate lead inductance to form a very low impedance path to ground. In this manner, substrate noise in mixed signal CMOS integrated circuits can be suppressed resulting in less noise and improved reliability in analog portions of the mixed mode circuits.Keywords
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