Abstract: The tool comprises the first step of providing a first software component, serving as a timing element, for receiving global synchronization commands as input and issuing global simulation scheduler task dispatch commands as output. A second software component is provided, serving as a global simulation scheduler, for receiving the global simulation scheduler task dispatch commands as input, synchronizing discrete event model and continuous model task dispatch as a function of simulation time, and issuing local simulation scheduler task dispatch commands as output. At least a single third software component is provided, serving as a local simulation scheduler, for receiving the local simulation scheduler task dispatch commands as input and issuing local simulation task execution commands as output. The combination of these steps provides a processing environment wherein the local simulation task execution commands invoke user supplied simulation application tasks in a time synchronized manner.

Abstract: Apparatus for determining ion dose and ion dose uniformity of an ion beam scanned over a target plane in response to scanning signals includes a mask assembly for sensing the beam current at several different locations and providing a single beam current signal. The mask assembly includes a mask plate with sensing apertures and an annular Faraday cup aligned with the apertures for sensing beam current. The beam current signal is integrated over time to determine ion dose. A demultiplexer, in response to x and y scan signals, separates the beam current signal into separate signal components from each sensing aperture. Ion dose uniformity is determined by comparing the separate signal components, integrated over time, with an average value of the signal component.

Abstract: In an integrated circuit package of the type in which multiple conductors are bonded between an integrated circuit chip and the body of the package, wire bonds are tested for defects by a method which includes the steps of: placing the integrated circuit package in a magnetic field; generating respective currents through the conductors while the package is in the field to thereupon induce a magnetic force; and monitoring the current through the conductors to determine if a bond breaks under the force and causes the current through it to stop.

Abstract: A circuit including a plurality of transistors in parallel for dividing load current substantially equally between the transistors including a transformer coupled to each transistor, with the primary winding of each transformer in series with the emitter-collector current flow path of its transistor and with all of the secondary windings connected together in series. The transistors are substantially identical in characteristics and rating, and the transformers are all substantially identical.

Abstract: An improved driver circuit for transistor power switches, which allows operation of the power transistor at high output power and at a duty range from zero to 100 percent without the previously large switching losses. This new driver circuit uses a constant current source which forces base current into the power transistor.

Abstract: A method and apparatus is disclosed for transferring an electrical load to an inverter from a utility A.C. power source without causing transient changes in the voltage and current fed to the load when such transfer is effected.