Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By presence or absence pulse detection
Reexamination Certificate
2006-07-25
2010-06-08
Le, Dinh T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By presence or absence pulse detection
C327S020000
Reexamination Certificate
active
07733131
ABSTRACT:
A signal presence detection device has a first reference voltage generation device in the form of a first voltage divider, a second reference voltage generation device in the form of a second voltage divider and a third reference voltage generation device in the form of a third voltage divider. The detection device also has a signal conditioning device such as a hysteretic amplifier with an output that is coupled to the first and second voltage dividers. A comparison device is coupled to all three voltage dividers to compare a voltage of the first voltage divider to a voltage of the third voltage divider and to compare a voltage of the second voltage divider to the voltage of the third voltage divider. The comparison device is coupled at two outputs thereof to two respective inputs of an XOR device. The XOR device receives respective signals from the first and second outputs of the comparison device and produces a signal presence output that serves to indicate whether an incoming signal is present or absent.
REFERENCES:
patent: 3956772 (1976-05-01), Cox
patent: 5966406 (1999-10-01), Hsich et al.
patent: 6198317 (2001-03-01), Chow et al.
patent: 6710605 (2004-03-01), Tang et al.
patent: 6907202 (2005-06-01), Ide et al.
patent: 7031616 (2006-04-01), Eilenberger et al.
patent: 2003/0016412 (2003-01-01), Eilenberger et al.
Bergman Michael
Bergman & Song LLP
Le Dinh T.
MRV Communications, Inc.
LandOfFree
Signal presence detector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Signal presence detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal presence detector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4173227