Apparatus for protection of electronic circuits
AssigneeLucent Technologies Inc.
InventorMarkus Brachmann
Life of this patent
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Abstract
The invention relates to an apparatus (1) for protection of electronic circuits with a decentralized power supply (PS1, PS2). One object of the invention is to avoid damage to other loads (PN1, PN2) which are still intact when a short circuit occurs in one load (PN1, PN2) in the circuit. The apparatus (1) comprises a number of loads (PN1, PN2) which are supplied in a decentralized manner. One monitoring device (PSUP1, PSUP2) in each case monitors a respective one of the load supply voltages (P1, P2) and ensures primary-side fault disconnection of all the power supplies (PS1, PS2) if a threshold value is undershot.
Claims16
An apparatus for protection of electronic circuits comprising :
- a first and a second power supply;
- a first and a second load associated with the first and the second power supply;
- a monitoring circuit for monitoring at least one of the first load, the second load, the first power supply and the second power supply;
- a first switch, associated with at least one of the power supplies for switching on and off the at least one power supply, a second switch for primary side fault disconnection of the at least one power supply;
- and
- a second switch for primary-side fault disconnection of the at least one power supply,
- an optocoupler with at least an optical transmitter;
- and
- a first resistor coupled with a controllable diode, the first resistor having a resistance such that a holding current holds the controllable diode active if the optical transmitter is switched off.
Dependencies are inferred from the claim text.