摘要:
The product has a power supply (P2) and a processor (P). The processor (P) has an input (PDD) for receiving a power-down signal indicating a status of the power supply (P2) and another input (Q) connected to another supply. The product also has a non-volatile memory (M) for storing data supplied by the processor (P). The processor (P) has an algorithm to detect a power-down status of the power supply (P2) by repeatedly checking the power-down signal and, upon detection that the power-down signal has a value (S0) corresponding to the power-down status, to complete an ongoing writing operation and stop the storage of data. The method prevents incorrect storage of data in a non-volatile memory by using the mentioned algorithm.
摘要:
A device and method are described for forming a grounded gate NMOS (GGNMOS) device used to provide protection against electrostatic discharge (ESD) in an integrated circuit (IC). The device is achieved by adding n-wells below the source and drain regions. By tailoring the dopant concentration profiles of the p-well and n-wells provided in the fabrication process, peak dopant concentrations are moved below the silicon surface. This moves ESD conduction deeper into the IC where thermal conductivity is improved, thereby avoiding thermal damage occurring with surface conduction. The device does not require a salicidation block or additional implantation and uses standard NMOS fabrication processing steps, making it advantageous over prior art solutions.
摘要:
A diode-connected lateral transistor on a substrate of a first conductivity type includes a vertical parasitic transistor through which a parasitic substrate leakage current flows. Means for shunting at least a portion of the flow of parasitic substrate leakage current away from the vertical parasitic transistor is provided.
摘要:
A method for determining when to inject hydrogen gas into the anode side of a fuel cell stack associated with a fuel cell vehicle when the vehicle is off. The method includes estimating the concentration of hydrogen gas in the anode side of the fuel cell stack using a gas concentration model and determining if the estimated concentration of hydrogen gas is below a first predetermined threshold. If the estimated hydrogen gas is less than the threshold, then hydrogen gas is injected into the anode side from a hydrogen source. While the hydrogen gas is being injected, the method compares the estimated concentration of the hydrogen gas in the anode side to a desired concentration, and generates an error signal there between. If the error signal is greater than a second predetermined threshold, the algorithm continues to inject the hydrogen into the anode side of the fuel cell stack.
摘要:
A system and method for determining a loss of cooling fluid from a thermal sub-system in a fuel cell system. The method includes monitoring current feedback from a high temperature pump that pumps the cooling fluid through a coolant loop. A measured current from the pump is compared to an expected current for the system operating conditions, and if that current is significantly less than what is expected, then it may be as a result of low cooling fluid. If the measured current is less than the expected current for a predetermined period of time, then the system can take mitigating action as a result of a low cooling fluid. Further, if the pump speed is too low to provide an accurate current measurement, then it can be increased if an overflow tank level sensor indicates a low cooling fluid level.
摘要:
An LDMOS transistor with a dummy gate comprises an extended drift region formed over a substrate, a drain region formed in the extended drift region, a channel region formed in the extended drift region, a source region formed in the channel region and a dielectric layer formed over the extended drift region. The LDMOS transistor with a dummy gate further comprises an active gate formed over the channel region and a dummy gate formed over the extended drift region. The dummy gate helps to reduce the gate charge of the LDMOS transistor while maintaining the breakdown voltage of the LDMOS transistor.
摘要:
A ceramic honeycomb structure comprised of at least two separate smaller ceramic honeycombs that have been adhered together by a cement comprised of inorganic fibers and a binding phase wherein the smaller honeycombs and fibers are bonded together by the binding phase which is comprised of an amorphous silicate, aluminate or alumino-silicate glass and the cement has at most about 5% by volume of other inorganic particles. The cement may be made in the absence of other inorganic and organic additives while achieving a shear thinning cement, for example, by mixing oppositely charged inorganic binders in water together so as to make a useful cement for applying to the smaller honeycombs to be cemented.
摘要:
Complementary RF LDMOS transistors have gate electrodes over split gate oxides. A source spacer of a second conductivity type extends laterally from the source tap of a first conductivity type to approximately the edge of the gate electrode above the thinnest gate oxide. A body of a first conductivity type extends from approximately the bottom center of the source tap to the substrate surface and lies under most of the thin section of the split gate oxide. The source spacer is approximately the length of the gate sidewall oxide and is self aligned with gate electrode. The body is also self aligned with gate electrode. The drain is surrounded by at least one buffer region which is self aligned to the other edge of the gate electrode above the thickest gate oxide and extends to the below the drain and extends laterally under the thickest gate oxide. Both the source tap and drain are self aligned with the gate side wall oxides and are thereby spaced apart laterally from the gate electrode.
摘要:
Ceramic honeycomb structures and methods to make the same are disclosed. The structures may be comprised of at least two separate smaller ceramic honeycombs that have been coated with a polymer to create a polymeric barrier coating and adhered together with a cement comprised of inorganic fibers and a binding phase which is comprised of amorphous silicate, aluminite or alumino silicate glass and other inorganic particles. The polymer is selected such that it is penetratable into or covering the pores in the honeycomb structure to form a thin barrier layer thereon to mitigate migration of the inorganic fibers, binding phase and water into the pores. The polymer is adapted to be burned off or decomposed at or below cement and honeycomb skin firing temperatures, or at or below honeycomb operating temperatures during application to create a honeycomb structure that, when formed into an exhaust filter, does not have any undesired pressure drop increase due to cement migration.
摘要:
A system and method for determining a loss of cooling fluid from a thermal sub-system in a fuel cell system. The method includes monitoring current feedback from a high temperature pump that pumps the cooling fluid through a coolant loop. A measured current from the pump is compared to an expected current for the system operating conditions, and if that current is significantly less than what is expected, then it may be as a result of low cooling fluid. If the measured current is less than the expected current for a predetermined period of time, then the system can take mitigating action as a result of a low cooling fluid. Further, if the pump speed is too low to provide an accurate current measurement, then it can be increased if an overflow tank level sensor indicates a low cooling fluid level.