Abstract: Information on the usage of memory mapped equipment in a telephone switching office can be continuously and non-invasively obtained by monitoring activity on the address, data, and control lines of the computer controlling such equipment. By counting the number of times a circuit is accessed by a computer, as determined by the detection of address, data, and control values for the circuit, equipment usage can be objectively determined. Further, a display device can be attached to an input/output port of a telephone office equipment monitor to provide a graphical representation of data obtained using the display device.

Abstract: A THz imaging system with the emitter region of the THz generator designed so that the sample to be analyzed is placed in the near field of the generator allows radiation to impact the sample without intervening optics.

Abstract: The present invention is an enclosure with a cooling scheme for cooling heat producing devices, such as electronic components, contained within the enclosure. Specifically, the cooling scheme of the present invention shelters the enclosure from solar heat without significantly decreasing the efficiency of the convection process associated with heat sinks. In an embodiment of the present invention, the enclosure comprises a housing and a solar shield. The housing includes a plurality of heat sinks for absorbing and dissipating heat generated by the devices. Each heat sink has an interior side to which the devices are mounted and an exterior side with a plurality of fins that form first and second channels. The first channels are aligned longitudinally with the prevalent direction of airflow, and the second channels are aligned in a contrasting manner to the first channels to allow fresh air to be drawn into the first channels (through the second channels) during the convection process.

Abstract: The input impedance of a laser subsystem is matched to the output impedance of its driver by means of a current/series or voltage/series-connected negative feedback loop which generates an electronic feedback signal from the laser output. A combiner combines the feedback signal and the drive signal and applies a difference signal to the laser. In another embodiment, a transformer is disposed between the driver and the combiner to decrease the apparent output impedance of the driver, thereby facilitating the impedance matching function of the feedback loop.

Abstract: The specification describes a p-channel MOS with self-aligned source and drain, and fabricated by a process that is fully compatible with simultaneously forming complementary self-aligned n-channel MOS devices and complementary IGBT devices.

Abstract: A system for analyzing a sample is disclosed. The system includes a light-transmitting probe with a light emitting tip having a diameter that is less than one-wavelength of light. The system is adapted to place the probe in close proximity to the sample without physically contacting the sample with the probe, and to move the sample relative to the probe such that light transmitted from the probe is directed onto the desired portion of the sample surface. The system further include a light source which transmits light into the probe tip. The system also includes a detector which detects a portion of the light transmitted through the sample. The detector is configured to detect that portion of the light that was incident on the sample surface at an angle greater than the critical angle. The detector is equipped with an aperture through which passes substantially all of the light that was incident on the surface at an angle less than the critical angle and which was transmitted through the sample.

Abstract: For use with an antenna tower, the antenna tower providing a mount for an active antenna that is subject to misdirection when the antenna tower sways, a system for, and method of, dynamically counteracting sway in the antenna tower. The system includes: (1) a rotation detector that senses a rotation, relative to a fixed reference plane, of a portion of the antenna tower proximate the active antenna and develops a sway signal indicative thereof and (2) antenna beam steering logic, coupled to the rotation detector, that receives the sway signal and modifies a drive signal provided to elements of the active antenna to redirect a beam projecting therefrom, the drive signal thereby compensated for the rotation to counteract the sway in the antenna tower. The system may form a portion of a wireless communications station.

Abstract: The present invention encompasses an apparatus and method for supporting multiple wireless data communication networks between a wireless communications device and a fixed communications device or another wireless communications device. Two network elements compose the physical apparatus, a protocol converter and a router. Upon receiving packet data from a fixed communications device, a router will locate a destination wireless communications device. The router will then convert the packet data to a format usable by the wireless data network that the wireless communications device is currently using for wireless access. After conversion, the router will perform actual transmission of the packet data to the correct destination wireless network. Once the converted packet data is received by the wireless network base station, it will be transmitted via RF to the destination wireless communications device.

Abstract: A boost converter for converting an input voltage received at an input thereof into first and second output voltages provided at first and second outputs thereof, respectively, and a method of operating the boost converter.

Abstract: A distortion reduction system for an audio device having first and second power supply voltages, a driver circuit for amplifying an audio signal, and, a speaker for outputting the amplified audio signal, allows a speaker driver system to increase significantly its average acoustic output power without appreciably degrading the audio signal quality. The system performs this function independently of the power supply voltage value by detecting a voltage difference between instantaneous peak amplified audio signal value and each first and second power supply voltage values and, providing a first gain control signal to the driver circuit when the detected difference is greater than a predetermined trigger level value, and a second gain control signal to the driver circuit when the detected difference is less than the predetermined trigger level value.

Abstract: Planar waveguide turning mirrors in integrated optical circuits are formed using at least one light beam including a wavelength in a particular wavelength range that is absorbed by the cladding layer of the circuit to vaporize a particular region of the corresponding cladding layer at the desired angle to form the recessed light deflector surface of the turning mirror. In addition, it is also possible to form the cladding layer on a substrate comprising a material that enables light wavelengths in the particular wavelength range to be substantially transmitted through the substrate to advantageously enable greater flexibility in the light beam energy and/or the time the beam is incident on the cladding layer during the vaporization process.

Abstract: A fault tolerant power supply system in which one or more controllers are connected to a battery plant providing a plurality of independent battery power feeds. Each controller includes a microprocessor which provides supervisory control signals to independently operating redundant power converters. Each power converter is provided with an input switching circuit which automatically disconnects the converter from its battery source when the converter input voltage falls below a preset minimum magnitude, thus protecting the battery against deep discharge conditions. When input voltage is removed from the converter, it is disabled so that power continues to be provided to the output load by the other converter(s) which continue to receive input power. When the input voltage is restored to a disabled converter, it is re-enabled only after a predetermined time delay elapses to insure that the input circuit is adequately pre-charged before operation resumes.

Abstract: An optical fiber take-up assembly including a plurality of adjustably positionable spools mounted to a support plate. When the fiber has a rigid fusion splice protector, the spacing between the spools is adjusted so that the splice protector is positioned along a straight length of the fiber between a pair of spools.

Abstract: An optical lithographic process and system for fabricating devices which includes an optical subsystem for reducing the rate of damage to the system's optics caused by exposure to energy pulses from an exposure source. The optical subsystem transforms a primary energy pulse from the exposure source into N secondary pulses, where N is .gtoreq.2 with a delay provided between each secondary pulse so as to reduce the peak intensity of the energy pulse being transmitted through the optical system. The subsystem redirects the secondary pulses spatially to satisfy source requirements for appropriate lithographic illuminators. Furthermore, the subsystem may be an intrinsic design feature of the illuminator or exposure source.

Abstract: A getterer structure for dielectrically isolated wafer structures such as bonded wafers. The getterer is a layer of polysilicon along the sidewalls of semiconductor regions isolated from each other by trenches. The polysilicon may be doped. The polysilicon is oxidized and polysilicon deposited to fill voids in the trenches.

Abstract: A feedback element for a two beam smart pixel receiver having at least one pair of electron devices of opposite electrical conductivity type, such as an NFET and a PFET, with input electrodes electrically connected and output electrodes electrically connected. The devices of a pair have opposing differential resistance characteristics in response to the same input signal so that the resistances of the devices of the pair add to become more linear.

Abstract: A method of forming low stack height transistors having controllable linewidth in an integrated circuit without channeling is disclosed. A disposable hardmask of doped glass is utilized to define the gate and subsequently protect the gate (and the underlying substrate) during ion implantation which forms the source and drains. An anti-reflective coating helps protect against reflective gate notching. A variety of silicided and non-silicided) structures may be formed.

Abstract: Records stored in a database are reset on an as-accessed basis. A record in the database to receive new data is identified when new data arrives to be incorporated with existing data in a given field. A next reset date stored in the record is read and compared with the current date. If the current date is later than the next reset date, the existing data in the field is replaced with a predetermined default value prior to incorporating or incrementing the new data in the field. Additionally, another next reset date is calculated and substituted for the previous next reset date in the record.

Abstract: A battery rack for containing batteries and methods of operation and manufacture thereof. In one embodiment, the battery rack includes: (1) a plurality of shelf support members, (2) first and second shelves, coupled to the shelf support members to receive support therefrom, the first and second shelves having corresponding first and second pluralities of divider apertures therethrough, the first plurality of divider apertures substantially vertically-aligned with the second plurality of divider apertures and (3) a plurality of divider rods passing through corresponding vertically-aligned ones of the first and second pluralities of divider apertures to form dividers to divide the battery rack into battery compartments, the plurality of divider rods having a diameter less than that of the first and second pluralities of divider apertures to allow the plurality of divider rods to rotate and thereby present a low frictional resistance to movement of batteries within the battery compartments.

Abstract: Use of an aperture in the reconstructed beam in reconstruction of multiple holograms increases selectivity beyond that realizable by spatial multiplexing so as to permit differentiation of overlapping images. "Aperturization" is suitably used for differentiation in the y-direction in shift holography, depending on Bragg selection in the x-direction.