Abstract: The present invention is a voltage regulator circuit with enhanced frequency compensation. The voltage regulator includes an error amplifier, a dynamic bias circuit, an enhanced frequency compensation unit, a pass device and a compensation circuit. A signal from the pass device acts as an input signal of the error amplifier and is compared with another input signal, producing a differential signal. The differential signal is amplified and then provided to the dynamic circuit and the enhanced frequency compensation unit. The enhanced frequency compensation unit is provided such that a zero reference value in a left-hand plane can be generated to optimize the compensation for the voltage regulator circuit. The error amplifier includes a capacitor for compensating an output voltage of the voltage regulator circuit.

Abstract: A self-drying animal litter box includes a box-like container shell having an upper portion, a lower portion and side walls, with an opening formed through the lower portion and a shelf positioned within the container shell along the side walls, and a flange extending downwardly from the lower portion, and also includes a lower tray having a channel for receiving at least a portion of that flange, with the container shell being removably attached to the lower tray. A panel having a generally planar top surface with a plurality of apertures formed therethrough is supported on the shelf, with the heating element attached to and spaced a predetermined distance below the panel and a heating element control coupled to the heating element and to the panel to maintain the panel at a substantially uniform and predetermined temperature for a preselected time.

Abstract: A carrying case with removable and replaceable interior panels is disclosed in which structure is provided in the case for releasably retaining such interior panels in fixed position within the case.

Abstract: An elastic band holder is comprised of a generally rectangular-shaped or generally cylindrical-shaped body member having one or more concave slotted portions encompassing the body. The slotted portions can be disposed in either parallel or perpendicular orientation to one another. All corners and edges of the device are rounded in order to prevent elastic band shearing. One or more receptacles are located on the body to receive and hold additional objects such as pens, pencils, rulers, paper clips and the like. Mushroom-shaped and apple-core-shaped embodiments are also provided.

Abstract: A briefcase adapter for carrying a portable computer in a briefcase comprising a panel for partitioning the briefcase into an upper and a lower compartment and an adjustable frame including a front frame member and a rear frame member held in substantially parallel spaced relationship relative to each other by a pair of side frame members disposed in substantially parallel spaced relationship to each other and disposed in substantially perpendicular relationship to the front frame member and the rear frame member, front and rear frame member adjustment assemblies to selectively and lockably adjust the length of the front and rear frame members for frictionally holding the adjustable frame in place within the briefcase, side frame member adjustment assemblies to selectively and lockably adjust the spacing between the front and rear frame members, and a frame adjustment assembly to selectively and lockably adjust the spacing between the side frame members to selectively adjust the substantially rectangular comp

Abstract: A shutter system for a portal opening such as a window or door including a flexible barrier made of a plurality of interlocking flexible barrier slats having stop elements attached to barrier slat ends, a mounting assembly having guide tracks disposed on each side of the portal opening and a retention assembly having retention surfaces fixedly attached to the mounting assembly facing away from each end of the barrier at an acute angle for engaging the stop elements such that when displacement forces cause the flexible barrier to flex, the stop elements are displaced to engage the retention surfaces at an initial angle to anchor the ends of the flexible barrier within the guide tracks such that the engagement angle decreases as the flexible barrier flexes further until the stop elements flushly engage the retention surface.

Abstract: A double wall tank for the storage of liquids is manufactured from a rigid, inner tank by helically extruding a synthetic resin outer sheath over the inner tank while preventing bonding between the extruded outer sheath and the inner tank.