Abstract: The present invention provides a mechanism and method for rotating at least a first and second housing elements (120, 220) of a device (100) with respect to one another. The first and second housing elements (120, 220) have a common axis of rotation (705), which is substantially perpendicular to a front surface of the device (100). The mechanism includes a tension device (300) having a first end coupled to the first housing element (120) and a second end coupled to the second housing element (220) at a point which travels around the axis of rotation along a path, where the path extends at least partly around the axis of rotation at a distance from the axis of rotation. The tension device (300) biases the rotational relationship of the first (120) and second (220) housing elements toward an opened position. The mechanism additionally includes a mechanical stop (600), that limits the further rotation of the first (120) and second (220) housing elements beyond an opened position.

Abstract: A power amplifier circuit for receiving a variable envelope input signal and for producing an amplified output signal is provided. The power amplifier circuit includes an envelope approximation circuit, an envelope amplifier circuit, a phasor approximation circuit, a quadrature modulation circuit, and a power amplifier. The envelope approximation circuit receives the variable envelope input signal and produces a bandlimited estimated envelope signal, corresponding to the amplitude of the variable envelope input signal. The bandlimited estimated envelope signal is then amplified by an envelope amplifier circuit. The amplified envelope signal is then coupled to the supply input of the power amplifier. The phasor approximation circuit receives the variable envelope input signal and produces a bandlimited estimated phasor signal. The quadrature modulation circuit receives the estimated phase signal and produces a modulated phase signal.

Abstract: The present invention provides a method of scheduling asynchronous transmissions for a plurality of subscriber units. The method includes receiving information associated with a plurality of subscriber units that have uplink data to transmit, the information including uplink timing offset information associated with each of the subscriber units. Two or more subscriber units are then selected from a set of subscriber units having a timing offset differential, that is below a predetermined threshold, where the timing offset differential is the difference between the timing offset of a first subscriber unit and the timing offset of a second subscriber unit further selectively offset by a multiple of the transmission segment size, which minimizes the difference.

Abstract: The present invention provides a method and apparatus for supplying power to a load at a plurality of different power levels. The method includes changing between high and low power outputs of the power amplifier when amplifying a signal having a common modulation format. A different bias is applied to the power amplifier at the low power output than the bias applied to the power amplifier at the high power output. The output of the power amplifier is loaded with a different impedance at the low power output than the impedance loaded at the output of the power amplifier output at the high power output. In at least one embodiment, the power amplifier changes between high and low power outputs at a different threshold level dependant upon whether the power amplifier is transitioning from the high power output to the low power output, or whether the power amplifier is transitioning from the low power output to the high power output.

Abstract: A method of processing received data in a distributed speech recognition process. The method comprises the steps of comparing a received form of the common header information from each of a plurality of header frames; classifying a predetermined number of the same received form as a reference; and processing one or more received data frames whose received common header information is different to the reference by using the reference form instead of the received different form. Also described is an apparatus for processing received data in a distributed speech recognition process.

Abstract: A searcher receiver (114) includes a sample buffer (202) which stores signal samples loaded using a real time clock. A real time linear sequence generator (RT LSG) (206) stores an initial state and is clocked using the real time clock. The contents of the RT LSG are loaded into a non-real time linear sequence generator (NRT LSG) (208) when sample processing begins. Samples are correlated using a non-real time clock to allow signal processing to be uncoupled from the chip rate. The analog front end (108) may be powered down or tuned to another frequency during non-real time processing.

Abstract: In a cellular telephone, a method of reducing background noise of an audio signal resulting from a received signal. Each digital sample of the audio signal is used to calculate an average energy of the audio signal over a number of samples. When the average energy is less than a threshold, a gain factor is calculated using the average energy and the threshold. The amplitude of the audio sample is then adjusted according to the gain factor.

Abstract: A latching assembly for a battery door of a portable electronic device includes a latch body that is retained on either the battery door or the housing of the device and which includes an encapsulated biasing spring and snapping catches that cannot be accessed by a user.