| 摘要 |
<p>A drive circuit for direct-current loads, comprising a number of series circuits, which each consist of an electronic switch, an automatically resetting normally-closed switch and a load. Each electronic switch is capable of driving the load in the respective series circuit. To that end the electronic switches are controlled by a processing circuit. Such control takes place on the basis of signals supplied by the electronic switches, which signal opening of the normally-closed switch to the processing circuit. Said driving and said signalling take place independently of each other thereby, so that opening of the normally-closed switch in a series circuit may cause a load in another series circuit to be driven. In addition to that the processing circuit may detect and signal an open-circuit condition of the loads. The drive circuit may be used in particular in cars.</p> |
