Electrical transmission or interconnection systems – Switching systems – Condition responsive
Reexamination Certificate
2007-06-19
2007-06-19
Jackson, Stephen W. (Department: 2836)
Electrical transmission or interconnection systems
Switching systems
Condition responsive
C361S090000
Reexamination Certificate
active
10568175
ABSTRACT:
The protection circuit serves for the monitoring of output voltages of a power supply unit which has a normal mode and a standby mode. The protection circuit comprises a first switching stage (T1), coupled to the current input (1) of which are output voltages (U5–U8) which are present both in the normal mode and in the standby mode and coupled to the control input of which are output voltages (U1–U3) which are only present in the normal mode. A control signal (Us), by which the power supply unit is switched over between normal mode and standby mode, is coupled to the control input (2) of this switching stage (T1). As a result, by means of the control signal, the output voltages which are only present in the normal mode are blocked in the standby mode by the control signal, so that in the standby mode only the output voltages (U5–U8) which are coupled to the current input (1) are monitored.
REFERENCES:
patent: 4937728 (1990-06-01), Leonardi
patent: 1058374 (2000-12-01), None
patent: 1113557 (2001-07-01), None
patent: 1331722 (2003-07-01), None
patent: 9-023644 (1997-01-01), None
Patent Abstracts of Japan, vol. 1997, No. 05, May 30, 1997 & JP 9-023644, See Ref. AD.
Search Report Dated Dec. 14, 2004.
Kögel Reinhard
Louvel Jean-Paul
Amaya Carlos
Jackson Stephen W.
Lagoni William A.
Laks Joseph J.
Shedd Robert D.
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