Method and apparatus for attenuating of a broadcasting...

Details Method and apparatus for attenuating of a broadcasting... Method and apparatus for attenuating of a broadcasting...

2006-01-31

2006-01-31

Pham, Toan N. (Department: 2632)

Communications: electrical

Condition responsive indicating system

With particular coupling link

C340S539210, C340S573100

Reexamination Certificate

active

06992581

ABSTRACT:
A receiving unit and method for determining the distance of an object from a receiving unit in a monitoring system, the receiving unit receives transmitted signals, the receiving unit comprises an attenuating unit for attenuating the transmitted signals by a controlled factor; a receiver for receiving and processing the transmitted signals into readable data; a microcontroller for controlling the operation of the local monitoring unit; and an electronic circuitry for calculating the received strength signal indication, whereby the distance of an object from the receiving unit can be determined.

REFERENCES:
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patent: 5831535 (1998-11-01), Reisman et al.
patent: 5936529 (1999-08-01), Reisman et al.
patent: 6127931 (2000-10-01), Mohr
patent: 6255951 (2001-07-01), De La Huerga
patent: 6392547 (2002-05-01), Stewart et al.
patent: 6756901 (2004-06-01), Campman

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