摘要:
An improved modular igniter package designed for bus communication with a central control module has an internal bridge element that is electrically accessible for factory testing of the bridge element. Temporary electrical interconnects internal to the igniter package electrically couple the bridge element to a pair of external bus communication terminals, enabling direct access to the bridge element by factory test equipment for accurate measurement of electrical parameters such as electrical resistance and thermal capacitance. Following measurement of the electrical parameters, the temporary interconnects are electrically destroyed, isolating the bus communication terminals from the bridge element. The temporary interconnects are preferably in the form of a pair of metal fuse elements, which are electrically destroyed by electrical currents passing through the fuse elements and respective diodes coupling the bridge element to a ground terminal of the igniter package.
摘要:
The present invention relates to an electrical fuse element (1) which comprises at least one fusible conductor (3) and a carrier (2). The object is to provide a fuse element (1) for all known tripping characteristics in a cost-effective production technique for the middle and low-current range. Furthermore, by means of a small outer geometry, the fuse element (1) is to be adaptable to modem methods of insertion. The way in which this object is achieved according to the invention is that the carrier (2) consists of a material of poor thermal conduction, in particular of a glass ceramic.
摘要:
A semiconductor bridge igniter device (10) having integral voltage anti-fuse protection provides an electric circuit including a first firing leg and, optionally, a monitor leg. The first firing leg includes a first semiconductor bridge having semiconductor pads (14a, 14b) separated and connected by a bridge (14c) and having metallized lands (16a, 16b) disposed over the pads (14a, 14b) so that an electrical potential applied across the metallized lands (16a, 16b) will cause sufficient current to flow through the firing leg of the electric circuit to release energy at the bridge (14c). A dielectric layer (15) is interposed within the first firing leg and has a breakdown voltage equal to a selected threshold voltage (Vth) and therefore provides protection against the device functioning at voltages below the threshold voltage (Vth). A continuity monitor leg of the electric circuit is comprised of either a fusible link (34) or a resistor (36) disposed in parallel to the first firing leg. A second firing leg may be provided which includes a second semiconductor bridge formed similar to the first semiconductor bridge although being mounted to receive a reverse polarity voltage from that of the first semiconductor bridge in order to reduce variations in firing voltage. A capacitor may be employed in parallel with the first firing leg in order to, e.g., reduce the effects of static electricity.