Abstract: An operational amplifier with a first stage differential input circuit having low aspect ratio devices of size chosen to achieve a low offset voltage, and an output stage having high aspect ratio devices able to operate at higher frequencies than the input stage, provides an amplifier with low static offset and requiring only a small compensation circuit due to the wide separation of frequency response poles. Adding a third stage gives a high gain design that can be stabilized with nested miller compensation. Adding a second differential input circuit of the same type as the first, and a level shifter, provides rail-to-rail operation without disturbing the low offset properties.

Abstract: A system and method is capable of evaluating and recommending digital image print size, with a user interview for specifying an image file and a requested print size width and height, an image reader for determining the pixel dimensions of the image, an evaluator for determining acceptable viewing distance based on a predetermined limit of acceptable pixel enlargement, an evaluator for preserving image aspect ratio, and a display for showing results of the evaluation, whereby quality issues arising from users attempting too much enlargement are minimized, and delays arising from questions about enlargement size or mis-matched aspect ratios are minimized. The system and method is capable of providing for overlapped file upload to minimize print services ordering time and increase the likelihood that orders arrive at a print services provider together with the image file to be printed.

Abstract: A process and apparatus is provided for generating chlorine dioxide gas for the fumigation of enclosed spaces that includes adding reactants for generation of chlorine dioxide by dropwise addition to an aqueous reaction medium in a sealed reaction chamber while bubbling a motive gas through the aqueous reaction medium, whereby the motive gas releases the generated chlorine dioxide gas from the aqueous reaction medium and drives the release of chlorine dioxide gas from reaction chamber.