System for noise reduction in circuits

Details System for noise reduction in circuits System for noise reduction in circuits

2004-06-03

2010-06-01

Paladini, Albert W (Department: 2836)

Electrical transmission or interconnection systems

Nonlinear reactor systems

Logic circuits

C307S001000, C307S003000, C329S318000, C329S319000, C329S320000, C370S317000

Reexamination Certificate

active

07728461

ABSTRACT:
Disclosed is an improved noise reducing apparatus using an anti-circuit, including a digital logic circuit and a digital anti-circuit corresponding to the digital logic circuit. The digital anti-circuit functions to cancel noise generated by the digital logic circuit. The anti-circuit includes logic to generate a similar number of switching edges as the logic circuit, where the anti-circuit edges are in the opposite direction as the logic circuit. The anti-circuit may have a circuit structure close to that of the noisy circuit, or can be formed of components different in structure but generating an output pattern similar to (and opposite from) the noisy circuit. In some embodiments, the differently structured components can include a state machine coupled to a memory or look-up-table.

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