Abstract: Embodiments of the present invention provide a lens mounting apparatus for mounting a lens to a substrate having a sensor in a sensor housing mounted on the substrate. The apparatus comprises a lens mount member including a lens mount body coupled with the lens housing. The lens mount body includes a locating element configured to register the lens mount body to the sensor housing mounted on the substrate. The lens mount member includes a flexible mounting element configured to be attached to the substrate and permit movement of the lens mount body toward and away from the sensor housing. A focus ring includes a slip ring portion coupled with the coupling surface of the lens housing.

Abstract: A method is provided of identifying position location of a transmitter device, such as a mobile or portable, in an inbound system. The inbound system includes free receivers all coupled, over appropriate radio frequency (RF) links, to a common reference receiver, the latter equipped with a high precision timebase master clock for receiver synchronization purposes. Rather than requiring each and every receiver to maintain a separate high-precision timebase to record position related timing signals for position location determination, in accordance with a preferred embodiment, the free receivers are configured to detect timing signals from the transmitter device, and without timestamping them, quickly forward them (in the form of a signal-received indication) after a fixed or otherwise known time delay to the reference receiver. The reference receiver, in turn, timestamps all signals from all free receivers according to its own master clock high precision timebase.

Abstract: A liquid crystal display device (10) for forming a display includes a liquid crystal panel (12), a switchable holographic optical element (14), and a reflective holographic optical element (16). Ambient light illuminates a front polarizer (18), which polarizes the ambient light and transmits the polarized light to the liquid crystal cell (20). The liquid crystal cell (20) receives the polarized light and transmits polarized light derived from the incident polarized light to a back polarizer (22). The back polarizer (22) polarizes the light and transmits the light to the switchable holographic optical element (14). While in a first mode, the switchable holographic optical element (14) redirects the light back toward the liquid crystal panel (12) within a first viewing cone (34) to form the display. In a second mode, the switchable holographic optical element (14) is transparent and transmits the light to the reflective holographic optical element (16).

Abstract: A general-purpose data terminal (242), such as a personal computer, portable computer, notebook computer, personal intelligent communicator, portable wireless terminal and the like employs a radio frequency (RF) modem (408) and is programmed to function as a two-way acknowledge back pager. The general purpose data terminal (242) maintains a table listing (600) of caller identification information and presents this information to the device user upon receipt of a page (300) from an identifiable caller. The device user may respond to the page by selecting one of a plurality of user definable responses to be transmitted back to the caller. If no response is selected the caller will receive a message informing them of the paged party's unavailability.

Abstract: An apparatus (100, 200) and method (300, 400) include an improved architecture for data processing that maintains data throughput while maintaining a reasonable circuit complexity. The method utilizes a system of calculating subsets of desired results that are independent of results of subsets not yet calculated, while providing a system of storage for data yet to be used and previously calculated results.

Abstract: A memory (20) includes a nonvolatile memory array (32) and a volatile memory array (22). The nonvolatile memory array (32) is subdivided into banks of memory cells. The volatile memory array (22) may also be subdivided into multiple banks, and is smaller than the nonvolatile memory array (32). A transfer circuit (40) transfers the contents of a bank of nonvolatile memory array (32) into a bank of volatile memory array (22) before the data can be accessed by a processor (160). In addition, a preload decision logic circuit (180) may transfer a bank of nonvolatile memory array (32) into volatile memory array (22) invisibly to the processor (160), to have the data available when needed, thus avoiding a space fault. Coupling a smaller volatile memory array (22) to a nonvolatile memory array (32) combines the advantages of faster access times and nonvolatility without greatly increasing the size of the memory (20).

Abstract: An improved method and apparatus for synchronizing a receiver oscillator with a transmitter oscillator is provided. The receiver is arranged with a counter driven by the receiver oscillator; and the transmitter is arranged with a counter driven by the transmitter oscillator. The transmitter sends a start signal to the receiver and simultaneously records the current reading of its counter. Later, the transmitter sends a stop signal to the receiver and simultaneously records the current reading of its counter. The transmitter then computes the elapsed count, and sends this value to the receiver as the "transmitter reading". Upon receipt of the start signal, the receiver records the current reading of its counter. Later, upon receipt of the stop signal, the receiver records the current reading of its counter, and then computes the elapsed count.

Abstract: An improved method of statistically determining the presence of noise on an FM communications channel permits digital signal processing techniques to more reliably squelch unnecesssary segments of an FM receiver reducing noise and power consumption. Digital samples of an FM signal having real (in-phase) and imaginary (phase quadrature) components representing the real and imaginary components of a phasor rotating about the origin of a Cartesian coordinate system at a rate indicative of a signal on the channel are mathematically operated on. Successive digital samples are multiplied by the complex conjugate of temporally adjacent samples producing a new stream of phasors representative of the phase change between samples. The phase changes between samples are processed to produce a number that indicates the probability of the channel having noise present.

Abstract: A circuit arrangement automatically detects and corrects received data in an FSK signalling scheme wherein FSK data symbols are represented by a grey code-like numbering system and a predetermined word sync pattern leads each data transmission. The arrangement includes a memory (226) for prestoring data representative of the word sync pattern, a comparator (224) for comparing the prestored word sync pattern with the received data, an error detection circuit (228-252) for determining if the grey code-like numbering system has been transposed, and an error correcting circuit (220) for automatically correcting the transposition in the data.