Abstract: Phase noise in an RF oscillator is significantly reduced by loosely couping another quieter RF oscillator having noise patterns uncorrelated to the first RF oscillator so that it frequency locks with the first RF oscillator. The coupling is increased until a significant reduction in phase noise occurs at high coupling levels where the first RF oscillator displays phase noise similar to the the second RF oscillator.

Abstract: A called number processing system transforms called/dialed telephone numbers into a unique global routing number. In the process called numbers are analyzed and based on the called/dialed number a Regional Administration Code is allocated and the dialed global number is translated into a global subscriber number. The global subscriber number is translated into a local subscriber number at the last international processing point.

Abstract: A circuit suitable for use in a regulated bi-directional output power supply requiring controlled transitions between states, such as in a Battery Polarity Switch is provided to utilize many of the same circuit components in regulating both opposing polarities of the output signal. An exemplary circuit achieves use of a single error amplifier and pulse width modulator circuit to obtain both positive and negative regulation of the battery polarity switch output, along with controlled transition between the two states. In a specific embodiment a logic inverter allows the single pulse width modulator to control in both directions. A ramped reference fed to the error amplifier allows the same amplifier to control the transitions.

Abstract: A constraining sleeve device is applied to a plastic battery casing to prevent distortion of the casing contour. A metal constraining sleeve slides onto and over a broad face or side of the plastic battery casing and provides constraining forces to maintain its contour. This sleeve is retained in place by end members at each end of the constraining sleeve device that engages structural features existing and located at opposing ends of the casing. In another embodiment a pair of constraining sleeve devices are applied to opposing broad sides of the battery casing.

Abstract: A wireless terminal utilizing digital radio processing utilizes stored program control to allow the wireless terminal to operate in a plurality of disposed wireless communication systems. In particular, the digital radio processing with appropriate stored program control operates in a plurality of wireless communication system by selectively and controllably enabling selection of frequency, channel bandwidth, modulation type, channel coding and source coding operational components appropriate to the communication system that the wireless unit is to operate in. A function control enables the wireless terminal to actively seek out and search for availability of wireless communications system in which it may operate.

Abstract: A wireless broadband communication system architecture is structured to provide an array of narrowband and broadband services to an end user on demand. The bandwidth of delivery is dynamically adjusted to deliver and satisfy service requirements by utilizing the appropriate bandwidth on demand. Bandwidth-on-demand is provided in accord with the invention by rearranging spectrum allocations so that a particular band spectrum is convertibly used to accomplish different purposes depending on present allocations and active applications of the system. The communications system is designed to utilize wireless communication for end point delivery to both fixed and potable terminals. The system supplies basic telephone service, wireless ISDN service, wireless data service, wireless multimedia service and various other wireless broadband service including types of interactive and broadcast video.

Abstract: A DC-DC converter utilizes a tapped transformer secondary winding as a means of achieving output voltage ripple cancellation. This ripple cancellation occurs at a specified input voltage. It operates by fixing the location of a tap on the secondary winding of the power transformer so that the output voltage ripple cancellation occurs at the specified input voltage. It also minimizes the volt seconds that must be sustained by the output filter inductor over a specified range of input voltage for the converter.

Abstract: A common mode lightning protection circuit includes a series circuit including a Y-capacitor and breakdown device connected between a current carrying input line and the frame ground of the power supply. This arrangement permits the ready application of current carrying line-to-frame ground dielectric tests needed to meet predefined safety requirements.

Abstract: A personal communicator handset is designed to operate as both a handset and as a speakerphone and to automatically switch between the two modes based on distance between the handset and the user's ear. This distance is determined by an infrared range detection unit built into the handset.

Abstract: A metrology system to analyze panel misregistration in a panel manufacturing process includes a software controlled system which checks defined panel parameters on the four corners of a panel and related artwork for processing with a master pattern etched on a glass reference with a machine vision measuring system. The panel or artwork being checked is positioned by panel center registration means to align the center of the panel with the center of the master pattern. Displacement and rotational differences are entered under software control into a data base and analyzed by a stored program intelligent analyses system into a plurality of parameters based on a parameter model which permits an analysis of the cause of the misregistration.

Abstract: A linear bearing slide assembly comprises an outer member, an inner member, a pair of linear bearing mechanisms, a preloading bar and a longitudinal spring. The outer member has a primary channel opening for accepting the inner member, and two secondary channel openings for accepting the linear bearing mechanisms and a preloading assembly. The inner member is located in the primary channel opening of the outer member. The first and second linear bearing mechanisms are located in the secondary channels on opposite sides of the primary channel opening. These linear bearing mechanisms support and guide the inner member as it travels along the primary channel opening in the outer member. Each of the linear bearing mechanisms can be conventionally constructed with either sliding or a plurality of rolling elements between two bearing ways.

Abstract: In many applications involving the coding and processing of speech signals the relevant applicable codebook is one which may be termed a sparse codebook. That is, the majority of elements in the codebook are zero valued. The searching of such a sparse codebook is accelerated in accord with the present invention by generating auxiliary information defining the sparse nature of the codebok and using this information to assist and speed up searches of the codebook.In a particular method of searching the calculation of the distance between a target vector and a stored codebook vector is enhanced by use of a distortion metric derived from energy terms and correlation terms of the codebook entries. Calculation of these energy and correlation terms is speeded up by exploiting the sparseness of the codebook entries. The non-zero elements (NZE) of the space codebook are each identified and are defined by their offset from a reference point.

Abstract: A bus bar comprised of a layered stack of flexible conductive planar leaf conductors, with sufficient cross-sectional current carrying capacity, is used in a bulk rectifier for conducting heavy currents between components. The bus bar is amenable to being easily coupled to mounting structures having mounting pad planes at different levels and angular positions. It is normally uninsulated and hence heat exchange is enhanced compared with traditional insulated cable. This permits the bus bars to operate at a relatively low temperature.

Abstract: A magnetic component (i.e. inductor or transformer) utilizes sheet winding patterns designed to enhance component assembly and maximize utilization of the core window areas. The windings are obtained from a copper sheet from which sheet winding patterns are obtained by etching, stamping or cutting the copper sheet. These winding patterns are contoured to fit precisely into the window area of the core of the magnetic component so that the window area is fully utilized. Basic symmetrical copper sheet patterns are used and these are sequentially stacked and combined to achieve multiple turn windings. These assembled winding components are connected to a bobbin which includes pins at its periphery to interconnect the copper sheet winding patterns to obtain the desired number of turns of the windings.

Abstract: A voice mail notification arrangement provides an audible notification to a mobile radiotelephone subscriber that one or more incoming calls have been redirected to the subscriber's mailbox.An unanswered incoming call is directed to the voice mail system which stores the calling party's voice message. A flag is set in a feature data base which includes this feature for the called subscriber. When the subscriber subsequently originates a call from their cellular mobile radiotelephone, or answers any incoming call, an audible notification (e.g., a burst of special tone) is provided, via the speaker of the mobile radiotelephone handset, to alert the subscriber at the outset of an active call that there are one or more voice messages in his/her voice mailbox. The flag is cleared when the voice messages are retrieved or upon the first call originated by the mobile subscriber, depending upon the mode of operation active in the subscriber's system.

Abstract: The antennas of a cellular telephone system are each connected to a signal divider/combiner array which/divides combines the antenna connecting path(s) into a plurality of antenna-radio/radio-antenna connecting paths. The divider array aspect is used for signal reception and the combiner array aspect is used for signal transmission. Each of these antenna connecting paths is connected to a controllable switch which in turn selectively couples it to/from a second plurality of radio transceivers. The antenna transmission/receive paths comprising the signal divider/combiners are embodied as strip type transmission lines in a multi layer PCB with all the paths having equal transmission losses. Micro vias are provided to permit electrical access to the various layers. The controllable switches are surface mounted on the outside of the PCB and are coupled to the various dividers/combiner through the micro vias.

Abstract: An interdigital resonant cavity filter structure is foled to provide two adjacent chambers physically positioned side by side and electrically connected in series with each other. A center plate divides the two chambers with a slot at one end of the structure to permit the two chambers to function as one resonant cavity in a folded relation to each other. Each chamber includes interdigital resonators which are related to the overall resonant cavity to produce a band pass filter action within the folded resonant cavity. The input of the filter structure is applied through a port of a circulator connected to one end of the resonant cavity and the output is taken from another port of the circulator. The opposite end of the resonant cavity is terminated in the characteristic impedance of the resonant cavity thereby causing the overall structure to operate as a high quality notch filter.

Abstract: Hardware complexity of transmitting and receiving equipment in a CDMA (Code Division Multple Access) cellular radio transmission system, embodying the principles of the invention, is reduced by the use of frequency modulation (FM) techniques to achieve spectral spreading in combination with signal modulation.The spectral spreading technique of a CDMA cellular radio telephone communications system is generalized by extending the range of values allotted to the spreading waveform code signal to include complex numbers of unity magnitude. This permits the addition of a baseband version of the information signal and spreadying waveforms instead of the conventional multiplication of the two signals in existing DSSS (Direct Sequence Spread Spectrum) communications sytems. The resultant summed signal is used to control a VCO (Voltage Controlled Oscillator) to produce a frequency modulated spread signal to be transmitted.

Abstract: A power converter is operative to reduce harmonics at an AC input by controlling its power switching so that a current waveform in a switched inductor is substantially identical to a rectified version of the input AC voltage waveform. The voltage spikes induced by the switching of the inductor into circuitry that includes the leakage inductance of a power transformer are subdued by circuitry that absorbs the initial voltage spike temporarily and then delivers that energy to the output load of the converter.

Abstract: A method of and apparatus for monitoring the output signals of a power converter, having galvanic isolation between the input and output, observes the voltage and current on the primary side of the converter as reflected through a tertiary winding or influenced through the primary winding of the power transformer and applies error corrections thereto to replicate the output signal. These corrections are arrived at by compensating for operational differences between input and output circuitry and by emulating, on the primary side, the output side circuitry that causes the differences between the output signal and the reflected signal, and the conditions to which the output side circuitry is subjected. The resulting replicated signal is applied to feedback control circuitry, in lieu of the actual output signal, and used to regulate the output of the power converter.