Abstract: In a data reproducing apparatus, a monitor edge sample value is generated based on a second sample value at a trailing edge of the reproduction signal and a change amount of the monitor edge sample value is generated as an offset amount in a first processing part. Then, the offset amount is supplied to a second processing part where the second sample value is obtained by sampling the reproduction signal at the trailing edge. Then, the second processing part restores data based on the reproduction signal and the offset amount.

Abstract: The present invention relates to an electronic system having a communication means and executing specified processing by software. In particular, there is provided an information processing system designed to making it possible to freely control upgrading of a facility thereof. The information processing system comprises a communication means, a plurality of processing system, a unit for allocating inherent data, which is used to enable or disable use, to at least one of the processing facilities, and disabling use of the one processing facility, and a unit for enabling the disabled use of the processing facility associated with data received via the communication means.

Abstract: A floating-point division circuit for performing division on floating-point data using a non-recovery type division method is disclosed. The floating-point division circuit includes a circuit portion for conducting a pre-division processing and pattern determination on a dividend and a divisor, an exponent operation portion, a mantissa division portion, and a quotient generating portion, further including either or both of an exception/non-operation detecting portion and a control portion. The exception/non-operation detecting portion generates a stop signal when detecting a non-operation pattern so as to stop a repetition of operations in the mantissa division portion. The control portion generates either a non-executional signal or a control signal so as to stop a latch operation during a period when no instruction for division is executed.

Abstract: An optical intensity modulator includes a compound semiconductor substrate of a first conductivity type having first and second surfaces, and a compound semiconductor active layer of the first conductivity type formed on the first surface of the compound semiconductor substrate. An incident laser beam to be intensity-modulated is applied to the compound semiconductor active layer. The modulator further includes a compound semiconductor layer of the first conductivity type formed on the compound semiconductor active layer, an opposite conductivity type compound semiconductor layer of a second conductivity type opposite to the first conductivity type, a first electrode formed on the opposite conductivity type compound semiconductor layer, and a second electrode formed on the second surface of the compound semiconductor substrate.