Abstract:
A communication system (100) dynamically manages a plurality of objects (105). Each object (120) has a communication device (145) placed within or in close proximity to the object (120) for communicating a plurality of object information (245). A group controller (220) communicates with the communication device (145) and takes over responsibility for communication within the communication system (100) for the communication device (145) when the object location (130) comes within a communication range of the group controller (220).
Abstract:
A paging receiver device (10) and method are disclosed in which analog information transmitted from an external source such as a paging transmitter are received and decoded. The analog information includes at least one voice message. The voice message is recovered, digitized, and stored in one of a plurality of message slots in a memory (50) of the paging receiver (10). In response to a paging user's request, the digitized stored message is recalled from memory (50), reconverted from digital information to analog information, and used to produce audible voice information being a replica of the original analog voice message.
Abstract:
A frequency synthesizer which has at least one programmably characterized phase lock loop circuit includes a buffer memory and an interface controller responsive to operational codes received from a central controller to direct transfer of data words for characterization of the phase lock loop circuit among the at least one phase lock loop circuit, the buffer memory, and the central controller. In one embodiment, the transfer of data words between the central controller and phase lock loop circuit or buffer memory are performed serially in accordance with a prespecified protocol and governed by a clock signal generated by the central controller. Data word transfers between the buffer memory and at least one phase lock loop circuit may also be performed serially in accordance with a prespecified protocol, but may be governed autonomously by an internal clock signal generated by the frequency synthesizer.
Abstract:
A frequency synthesizer which has at least one programmably characterized phase lock loop circuit includes a buffer memory and an interface controller responsive to operational codes received from a central controller to direct transfer of data words for characterization of the phase lock loop circuit among the at least one phase lock loop circuit, the buffer memory, and the central controller. In one embodiment, the transfer of data words between the central controller and phase lock loop circuit or buffer memory are performed serially in accordance with a prespecified protocol and governed by a clock signal generated by the central controller. Data word transfers between the buffer memory and at least one phase lock loop circuit may also be performed serially in accordance with a prespecified protocol, but may be governed autonomously by an internal clock signal generated by the frequency synthesizer.
Abstract:
A high speed CMOS divide by 4/5 prescaler circuit comprises first, second, third, fourth, and fifth inverter stages. When a modulas control signal is low, the prescaler operates as five clocked inverters in series having an output which is fed back to the input of the initial stage. That is, the circuit operates as a five stage clocked ring oscillator wherein only one output changes on each clock edge. When a modulas control signal is high indicating that a divide by four is desired, the counter operates as a five stage ring oscillator for seven clock edges. On the eighth edge, feed forward circuitry forces the last three stages to change states simultaneously.
Abstract:
A communication system (100) dynamically manages a plurality of objects (105). Each object (120) has a communication device (145) placed within or in close proximity to the object (120) for communicating a plurality of object information (245). A group controller (220) communicates with the communication device (145) and takes over responsibility for communication within the communication system (100) for the communication device (145) when the object location (130) comes within a communication range of the group controller (220).
Abstract:
A paging receiver device (10) and method are disclosed in which analog information transmitted from an external source such as a paging transmitter are received and decoded. The analog information includes at least one voice message. The voice message is recovered, digitized, and stored in one of a plurality of message slots in a memory (50) of the paging receiver (10). In response to a paging user's request, the digitized stored message is recalled from memory (50), reconverted from digital information to analog information, and used to produce audible voice information being a replica of the original analog voice message.