Abstract: A current sensing circuit comprising a current amplification stage for amplifying a sensed current input, and a comparator having as a first input the amplified sensed current input. The amplification stage comprises a first transistor connected between a first rail and a second rail, the sensed current being input to a source of the first transistor, the amplified sensed current being output from the drain of the first transistor, and a gate of the first transistor being biased. The circuit is capable of sensing an analogue signal of 100 ?A or less and outputting a rail-to-rail digital signal.

Abstract: A sensing circuit capable of detecting very low current pulses of the order of 10's and 100's of micro amps. The sensing circuit comprises a common gate amplification stage capable of amplifying a sensed current, a comparison stage having as an input the amplified sensed current and a feedback stage capable of returning an output of the comparison stage to the common gate amplification stage.

Abstract: A method, comprising determining parameters for a first window and a second window on a display screen, said first window superimposed in front of the second window. The method further comprises determining which areas of the second window are not superimposed by the first window and dividing the areas into multiple portions, each portion abutting a separate side of the first window. For each of the portions, the method comprises fetching pixel data from a memory using an addressing mode suitable for said portion and displaying said pixel data on the display screen.

Abstract: A method and system for retrieving records from a database are described. The method and system retrieve a first set of records from the database, determine a number of relevant records in the first set of records, compare the target number of relevant records to the number of relevant records, and retrieve a second set of records from the database when the number of relevant records in the first set of records is less than the target number of relevant records. The second set of records includes the first set of records and at least one additional record. Optionally, the number of records in the second set of records is determined by a second function of an ordered list of functions that are each dependant on at least one of a target value and an access attempt value.

Abstract: The present invention defines an optoelectronic device comprising a light source, a wave guide and a first signal line, wherein a cell is formed at the intersection between the wave guide and the first signal line, the cell comprising a light activated switch and an output device. The optoelectronic device may be an optoelectronic memory wherein the output device is a storage unit. Alternatively the optoelectronic device may be an optoelectronic display device wherein the output device is a light emitting device or a liquid crystal device.