Abstract: A method and apparatus for digitally driving an addressable pixel display by modulating each pixel e.g., on or off, in short time pulses. A preferred embodiment responds to N-bit pixel words derived from a source digital file at a rate F1 for producing M-bit data streams at a rate F2 where N>M and F1<F2. Each data stream is preferably produced by an oversampling data modulator employing a delta-sigma implementation.

Abstract: A method and apparatus for digitally driving an addressable pixel display by modulating each pixel e.g., on or off, in short time pulses. A preferred embodiment responds to N-bit pixel words derived from a source digital file at a rate F1 for producing M-bit data streams at a rate F2 where N>M and F1<F2. Each data stream is preferably produced by an oversampling data modulator employing a delta-sigma implementation.

Abstract: Apparatus for time multiplexed oversampled analog to digital modulation is provided. Embodiments generally include a plurality of energy collection elements coupled to individual pixel processors preferably mounted proximate to each energy collection element. Each pixel processor shares a common block of conversion logic to form a plurality of integration loops to process the signal generated by each energy collection element. Specific embodiments are shown using CCD, CID, FET, and charge well technologies.

Abstract: Apparatus for time multiplexed oversampled analog to digital modulation is provided. Embodiments include modulators (60, 300 and 450) and focal plane optical imagers (100, 160 and 200). Embodiments generally include a plurality of storage elements (70) to hold modulation residues. Multiplexor and demultiplexor structures (72, 74) enable residues to be updated and stored for a plurality of modulated signals. Specific embodiments (500, 600) are shown in CMOS and mixed CMOS-CCD technologies.

Abstract: Apparatus for time multiplexed oversampled analog to digital modulation is provided. Embodiments include modulators (60 and 300) and focal plane optical imagers (100, 160 and 200). The apparatus includes a plurality of storage elements (70) to hold modulation residues. Multiplexor and demultiplexor structures (72, 74) enable residues to be updated and stored for a plurality of modulated signals.

Abstract: A memory management process for garbage collection in a symbolic digital processor. An operating processor performs the symbolic digital processing while a memory management processor operates in the background to collect garbage, that is, to discard obsolete objects from memory. The memory management processor identifies all objects in old memory that are accessible from a root set of objects and copies the accessible objects to a copy space. In contrast to prior art systems, each accessible object in old space is not replaced by a pointer to copy space. Instead, a current copy of each of the accessible objects is created in copy space and upon completion of this task, the old space and copy space are exchanged or flipped almost instantaneously. As a consequence, the processing speed of the operating processor is unaffected by the garbage collection process thus allowing the operating processor to operate with real time processes.

Abstract: A plurality of logic cells that may be iteratively connected in the form of an array to form an electrically programmable logic device. Each such cell utilizes a plurality of threshold modifiable CMOS transistors as permanent memory storage devices to provide sixteen possible Boolean logic functions for two input variables. The logical operation of the circuit is controlled by simply changing the programming threshold of the memory transistors. These transistors are buffered by drivers and are provided with a switched load transistor. This substantially reduces memory transistor size and power consumption and permits long term program voltage retention. An 18.times.9 cell array embodiment is illustrated along with programming and cell selection logic. A 9.times.9 cell array embodiment is also shown.

Abstract: A system particularly suited for residential use for monitoring various input sensors and for controlling various output devices including heat and air condition units, control motors, and alarms.