EP 1100100 A1 20010516 - A circuit for detecting the state of electrical switches
Title (en)
A circuit for detecting the state of electrical switches
Title (de)
Schaltung zur Zustandserkennung eines elektrischen Schalters
Title (fr)
Circuit pour détecter l'état d'un contact électrique
Publication
Application
Priority
IT TO990969 A 19991112
Abstract (en)
A circuit for detecting the state of electrical switches, for example, switches (SWi) in a motor vehicle, is described and comprises a network (B1, B2) which supplies the switches (SWi) and which can produce signals indicative of the operative state of each switch, and a control unit (P) which can correctly interpret the operative states of the switches (SWi). The supply network comprises first and second circuit branches (B1; B2) arranged, respectively, for continuously supplying a monitoring current and for selectively supplying a diagnosis current of substantially greater intensity than the monitoring current. The control unit (P) detects and compares the signals indicative of the state of each switch (SWi) which are acquired when the switch is supplied by the monitoring current or by the diagnosis current, and interprets the state of the switch (SWi) from a comparison thereof. <IMAGE>
IPC 1-7
IPC 8 full level
CPC (source: EP)
H01H 9/167 (2013.01); H01H 1/0015 (2013.01)
Citation (search report)
- [YA] EP 0259881 A2 19880316 - OMRON TATEISI ELECTRONICS CO [JP]
- [YA] DE 4015271 A1 19911114 - VDO SCHINDLING [DE]
- [A] US 4323890 A 19820406 - LEMKE ANDREAS
- [A] US 5772205 A 19980630 - COLDEBELLA MARK J [US], et al
- [A] EP 0301442 A2 19890201 - BAYERISCHE MOTOREN WERKE AG [DE]
- [A] US 5714852 A 19980203 - ENDERICH MARK A [US]
- [A] US 5374922 A 19941220 - EBERSOHL GERARD [FR]
Designated contracting state (EPC)
DE ES FR GB
DOCDB simple family (publication)
EP 1100100 A1 20010516; EP 1100100 B1 20061004; DE 60031069 D1 20061116; DE 60031069 T2 20070208; ES 2267448 T3 20070316; IT 1311343 B1 20020312; IT TO990969 A0 19991112; IT TO990969 A1 20010512
DOCDB simple family (application)
EP 00124515 A 20001109; DE 60031069 T 20001109; ES 00124515 T 20001109; IT TO990969 A 19991112