Abstract:
A method calculates a total source/drain resistance for a field effect transistor (FET) device. The method counts the number (N) of contacts in each source/drain region of the FET device, partitions each source/drain region into N contact regions and calculates a set of resistances of elements and connections to the FET device. The measured dimensions of widths, lengths, and distances of layout shapes forming the FET and the connections to the FET are determined and a set of weights based on relative widths of the contact regions are computed. The total source/drain resistance of the FET device is determined by summing products of the set of resistances and the set of weights for each of a plurality of contacts in series, the summing being performed for all of the plurality of contacts in one of a source region and a drain region of the FET. A netlist is formed based on the total source resistance and total drain resistance of the FET device.
Abstract:
A method calculates a total source/drain resistance for a field effect transistor (FET) device. The method counts the number (N) of contacts in each source/drain region of the FET device, partitions each source/drain region into N contact regions and calculates a set of resistances of elements and connections to the FET device. The measured dimensions of widths, lengths, and distances of layout shapes forming the FET and the connections to the FET are determined and a set of weights based on relative widths of the contact regions are computed. The total source/drain resistance of the FET device is determined by summing products of the set of resistances and the set of weights for each of a plurality of contacts in series, the summing being performed for all of the plurality of contacts in one of a source region and a drain region of the FET. A netlist is formed based on the total source resistance and total drain resistance of the FET device.
Abstract:
A frequency synthesizer employing direct FM, as opposed to phase modulation, so subaudible tones may be transmitted, in the form of a 10 KHz increment, direct synthesizer with a skewed frequency standard deriving four intermediate 2.5 KHz tuning steps. Fast settling time of frequency change accommodates semi duplex operation, and a shaping network provides the amount of skewing changes required between band ends for substantially perfect tracking. A low division ratio programmed divider in the system maximizes transmitter signal to noise ratio, and a low pass filter in the synthesizer phase locked loop allows voice band moduation.
Abstract:
A compact sewage treatment unit has at least one pressure vessel containing a heat exchanger in which a waste stream is heated to coking temperature to coke the bulk of the organic wastes except for greases which are collected in a trap tray in the upper part of the heat exchanger and discharged. Gas formed during coking is removed through a pressure relief valve. A trap tray near the bottom of the heat exchanger serves to separate the coke and the decoked effluent. The effluent passes around the tube and up the side of the pressure vessel to serve as a heat transfer medium for the coking reaction and for heating the incoming waste slurry to coking temperature. A sparger is provided above the heated zone for bringing oxygen or air in contact with the decoked effluent to oxidize any dissolved organic materials which were not coked. The unit is particularly useful for shipboard use and in apartments.
Abstract:
A method of linking on-chip parasitic coupling capacitance into distributed pre-layout passive models such as distributed transmission line models and on-chip spiral inductor models includes recognizing a passive device such as a distributed transmission line device and an on-chip spiral inductor device, interpreting data obtained from the recognizing the passive device, breaking the passive device into a plurality of sections, the plurality of sections including a terminal of a model call, extracting parameters of the passive device by Layout Versus Schematic (LVS) and parasitic extraction, connecting the terminal to a pre-layout passive network by selectively low and high resistive paths set by the parameters of the passive device depending on whether crossing lines are present or not present in one of the plurality of sections, connecting the terminal to a distributed passive model, and coupling the crossing lines to the terminal via capacitors produced in an extracted netlist with the passive device having distributed coupling to a plurality of crossing lines.
Abstract:
Methods for distributing a random variable by spatial interpolation with statistical corrections. The method includes assigning a numerical value of the random variable at each vertex of an array of equilateral triangles formed in a planar coordinate frame and defining a plurality of test points at respective spatial locations in the planar coordinate frame that are bounded by the array of equilateral triangles. A numerical value of the random variable is distributed at each of the test points by spatial interpolation from one or more of the numerical values of the random variable assigned at each vertex of the array of equilateral triangles. The method further includes adjusting the numerical value of the random variable distributed at each of the test points with a respective correction factor.
Abstract:
A shotgun sight is provided with a barrel, a sighting rib, a rib support member, a pitch adjustment mechanism, and a latch mechanism. The rib support member is provided on the barrel. The pitch adjustment mechanism is provided between the rib and the rib support member to adjust pitch of the rib relative to the barrel. The latch mechanism has a pair of coacting base plates. A first base plate is provided along a proximal end of the rib and a second base plate is provided on the rib support member. Each base plate has an array of complementary-shaped interlocking projections. One of the base plates is configured to be forcibly urged apart from the other base plate to reposition the array of interlocking projections in order to selectively position the rib relative to the barrel at one of a plurality of locations each corresponding with a unique pitch for the rib relative to the barrel. An adjustable gun sight is also provided.