摘要:
An iterative timing analysis is analytically performed before a chip is fabricated, based on a methodology using optical proximity correction techniques for shortening the gate lengths and adjusting metal line widths and proximity distances of critical time sensitive devices. The additional mask is used as a selective trim to form shortened gate lengths or wider metal lines for the selected, predetermined transistors, affecting the threshold voltages and the RC time constants of the selected devices. Marker shapes identify a predetermined subgroup of circuitry that constitutes the devices in the critical timing path. The analysis methodology is repeated as often as needed to improve the timing of the circuit with shortened designed gate lengths and modified RC timing constants until manufacturing limits are reached. A mask is made for the selected critical devices using OPC techniques.
摘要:
The present invention relates to a dynamic fiber capable of changing in response to external stimuli. The fiber in accordance with the present invention undergoes a radial symmetric change. The fiber in accordance with the present invention may be heat sensitive, moisture sensitive, magnetic field sensitive, electromagnetic field sensitive, etc. Fibers in accordance with the present invention may be incorporated into yarns that may be knitted or woven into textiles/fabrics. Garments or other articles of manufacture may be formed from textiles/fabrics incorporating dynamic fibers, permitting the properties of garments to alter in response to environmental conditions.
摘要:
A method and apparatus for sensing levels of insoluble fluids within a storage vessel utilizing an array of main capacitive sensors having differing geometries. The array of main capacitive sensors gives the ability to measure the levels of insoluble liquids in a vessel. Each of the main capacitive sensors include at least one pair of conductive plates capable of submersion in the at least three insoluble fluids, and the geometries of the pair of conductive plates differ and are distinct, such as in distance or in width, in each of the main capacitive sensors. In addition, the apparatus and method may include at least one reference sensor placed intermittently along the height of the vessel to provide input as to the permittivities of the insoluble fluids.
摘要:
The present invention relates to a dynamic fiber capable of changing in response to external stimuli. The fiber in accordance with the present invention undergoes a radial symmetric change. The fiber in accordance with the present invention may be heat sensitive, moisture sensitive, magnetic field sensitive, electromagnetic field sensitive, etc. Fibers in accordance with the present invention may be incorporated into yarns that may be knitted or woven into textiles/fabrics. Garments or other articles of manufacture may be formed from textiles/fabrics incorporating dynamic fibers, permitting the properties of garments to alter in response to environmental conditions.
摘要:
A device for the safe handling of nonhuman primates includes a transparent elongated body having a top end and a bottom end. A ventilated lid is attached to the top end of the body by means of a hinge and includes a positive locking arrangement. The bottom end of the body is removably connected to a base which has first and second springs attached thereto. The body includes a plurality of apertures into which are positioned a plurality of inserts. Inserts proximate the bottom of the body include projections which are positioned under the first and second springs to maintain the body on the base.
摘要:
A strike indicator that indicates when a fish bites and reduces false positives, comprising a light source, a power source, a printed circuit board, an accelerometer integrated circuit mounted on said printed circuit board, and a microcontroller mounted on said printed circuit board. The strike indicator may be housed in a fishing rod, with the light source illuminating the tip of the rod. The accelerometer detects acceleration of the rod, and the microcontroller utilizes an algorithm to determine whether the acceleration is due to a fish biting or due to other causes. If the acceleration is due to a fish biting, the light source is activated, alerting the user that a fish is biting.
摘要:
A hybrid linear wire model for tuning the transistor widths of circuits linked by RC interconnects is described. The method uses two embedded simulators during the tuning process on netlists that contain resistors (Rs). A Timing oriented simulator is used only for timing purposes on the original netlist that includes all the Rs. A Gradient oriented simulator is then run only on the modified netlist with all Rs shorted and within the iterative loop of the tuner to compute gradients. The present hybrid method achieves a significant improvement in computational speed. The Timing oriented simulator is fast and accurate for only timing netlists with Rs, but cannot compute gradients efficiently. The Gradient oriented simulator computes gradients efficiently but cannot do so in the presence of Rs. To prevent “de-tuning” that typically occurs when all Rs are shorted, ‘wire-adjusts’ are provided that make the initial timing results using the Gradient oriented simulator on the shorted netlist match the timing results using Timing oriented simulator on the original netlist. This permits the optimizer sense initially the correct set of critical timing paths, and more significantly, it permits the wire-adjusts keep track of the changing transistor widths to guide the optimizer during the iterations until convergence is achieved.