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专利名称：Electronic circuit arrangement for switching
an electrical load in a fail safe manner
发明人：David Beaudion,Sylvain Chartier,Lorne
O'Connor,Eric Valin
申请号：US109673申请日：20041015
公开号：US20050083614A1公开日：20050421
专利附图：
摘要：An electronic circuit arrangement for switching an electrical load disposedintermediate a power source and a ground includes a combinatorial logic block for
receiving and processing at least one condition signal and for generating a first enablingsignal. A biasing element generates a bias voltage upon receiving the first enabling signal.A first switch disposed intermediate the electrical load and the power source conductsupon application of the bias voltage enabling passage of an electrical supply currentfrom the power source to the electrical load. A fail-safe circuit operation is achieved withthe use of a microprocessor which generates a second enabling signal feeding into thebiasing element and a second switch disposed intermediate the electrical load and theground and which conducts upon application of a third enabling signal from themicroprocessor thus enabling passage of the electrical supply current to ground. Firstand second feedback circuits monitor the state of the electrical load and provide statusfeedback to the microprocessor which is adapted for annunciating a fault condition.
申请人：David Beaudion,Sylvain Chartier,Lorne O'Connor,Eric Valin
地址：Blainville CA,Lachenaie CA,Laval CA,Lachenaie CA
国籍：CA,CA,CA,CA
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