Yishu Y Shi

US Patent:

20040207404, Oct 21, 2004

Filed:

Apr 16, 2003

Appl. No.:

10/417390

Inventors:

Song Zhang - Naperville IL, US
Yishu Shi - Buffalo Grove IL, US
Christopher Bach - Elgin IL, US
Michael Ryan - Crystal Lake IL, US
Michael Beruscha - Algonquin IL, US

International Classification:

G01N027/416

US Classification:

324/426000

Abstract:

A power supply is configured to accept battery and external power sources, and is adapted for use in equipment in a broadband communications network. The power supply includes a first voltage detector adapted to detect a first voltage signal at an electrical path associated with the battery power source; a second voltage detector adapted to detect a second voltage signal at an electrical path associated with the external power source; a processor responsive to the first voltage detector and the second voltage detector, adapted to receive the first voltage signal and the second voltage signal and generate an electrical signal indicating whether the battery power source is present, charged and being used based on the first voltage signal and the second voltage signal; and a light emitting diode responsive to the processor, adapted to receive the electrical signal and, based on the electrical signal, display, in an order of priority, one of a plurality of states, which indicates whether the battery power source is present, charged or being used.