Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2006-01-17
2006-01-17
Burd, Kevin (Department: 2631)
Pulse or digital communications
Receivers
Interference or noise reduction
C375S316000
Reexamination Certificate
active
06987822
ABSTRACT:
A circuit and method reduces noise signals coupled to a reference voltage used by a digital differential input receiver having an input that is coupled to an input/output terminal. The circuit and method selectively isolates the reference voltage from the input/output terminal to which output signals are selectively applied. The isolation occurs responsive to detecting that an output signal is being applied to the input/output terminal so that transitions of the output signal are not coupled through the input receiver to generate noise in the reference voltage. In one embodiment, the isolation is provided by placing an isolation circuit between the input receiver and either the input/output terminal or a source of the reference voltage. In another embodiment, the isolation is provided by selectively biasing the input receiver so that coupling of output signal transitions through the input receiver is substantially reduced.
REFERENCES:
patent: 5369409 (1994-11-01), Urabe et al.
patent: 6040731 (2000-03-01), Chen et al.
patent: 6374337 (2002-04-01), Estakhri
Burd Kevin
Dorsey & Whitney LLP
Micro)n Technology, Inc.
LandOfFree
Circuit and method for reducing noise interference in... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Circuit and method for reducing noise interference in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit and method for reducing noise interference in... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3549022