Suppression of noise in an integrated circuit

Details Suppression of noise in an integrated circuit Suppression of noise in an integrated circuit

2007-08-14

2007-08-14

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

C327S552000

Reexamination Certificate

active

10537028

ABSTRACT:
Sub-circuits of an integrated circuit can act as noise sources on common conductors such as power supply lines and the substrate. Each of these conductors may act as a noise medium capable of transferring noise signals from the noise source to other sub-circuits. One or more feedback circuits are coupled between input and output points on opposite sides of where a circuit to be protected is connected to such a medium, so that a output of the feedback circuit is coupled to the noise medium closer to certain noise sources than the input of the feedback circuit. Preferably, multiple feedback circuits are cross-coupled and have transfer connections so that coupling between the input and outputs of different feedback circuit is at least partially suppressed.

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Chan H H Y et al: “Substrate coupled noise reduction and active noise suppression circuits for mixed-signal system-on-a-chip designs” Proceedings of the 44th. IEEE 2001 Midwest Symposium on Circuits and Systems. MWSCAS 2001. Dayton, OH, Aug. 14-17, 2001, Midwest Symposium on Circuits and Systems, New York, NY: IEEE, US, vol. 1 of 2, pp. 154-157.

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