Motorola Corporation

Monte G Miller

John M Golio

David J Halchin

Robert C Turner

Ronald J Massey

A method executed by a computer for performing numerical optimization of arbitrary functions in a computer model using parallel processors (10, 12, 14). The method initializes (20) each processor with an initial estimate of the parameter value to be optimized. The initial estimate is evaluated (22) in each processor to determine a solution. A best estimate of the parameter value from the result in each processor is selected (24), and one or more of the parallel processors with the best estimate is set to run in gradient mode while the remaining processors run in random mode (26). The estimates of the parameter value from the processors running in random mode is evaluated until a local minimum is obtained from the processor running in gradient mode (28). The process is repeated until an optimal solution is found (34).

Optimization method using parallel processors

A variable field effect capacitive device suitable for providing different amounts of capacitance in response to control signals of different magnitudes. The device includes a pair of plate electrodes and a pair of control electrodes. A semiconductor region is located between the control electrodes. The plates each make Schottky contact to the semiconductor region to form a depletion region therein which changes shape in response to changes in the magnitude of the control signals.

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Chandler, AZ, United States of America

Monte G Miller