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Abstract

Method and apparatus for preconditioning and in-use conditioning of transistors formed on a semiconductor-on-insulator structure is described. More particularly, transistors of a programmable logic device (PLD), such as a field programmable gate array (FPGA), are preconditioned to take advantage of charge accumulation owing to a 'floating body' effect. This preconditioning takes a form of switching transistors on and off prior to customer operation. Accordingly, semiconductor-on-insulator transistors accumulate charge during this switching period, so when customer operation takes place, transistor switching times are less variable over a period of operation of the PLD. Additionally, a design process and implementation is described for identification and in-use conditioning of transistors that may need conditioning during customer operation to control switching time variability.

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