Samuel F Martin

US Patent:

6938224, Aug 30, 2005

Filed:

Feb 20, 2002

Appl. No.:

10/079447

Inventors:

Thaddeus John Gabara - Murray Hill NJ, US
Samuel Suresh Martin - Gillette NJ, US

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

G06F017/50

US Classification:

716 1, 716 4, 716 7, 703 2, 703 14

Abstract:

A method of predicting the electromagnetic noise emitted by a digital circuit on an integrated circuit is disclosed. In accordance with the illustrative embodiment, the output of each digital circuit element in the digital circuit is considered as a bit stream. All of these bits streams are, in aggregate, considered as a noise source that is characterized by a power spectral density, S(ω). The effect of the noise source on an analog circuit can be modeled as a lumped circuit, wherein the lumped circuit contains a noise source that represents the digital circuit; a multi-port network, also referred to as a lumped element, that represents that portion of the substrate between the digital circuit and the analog circuit; and a multi-port network that represents the analog circuit.