摘要:
An energy constrained device (100) includes a motion sensor (150) operative to detect motion of the device (100); a device position determinator (130); and a controller (110) operatively coupled to the motion sensor (150) and to the device position determinator (130) and operative to receive a device location request for the energy constrained device (100), to determine whether the energy constrained device (100) has moved based on the motion sensor (150), and to determine whether to request position information from the device position determinator (130) based on device movement. A method for saving power for a device position determinator (130) in a energy constrained device (100) includes determining whether position information has been requested from the device position determinator (130); and if not so, automatically switching the device position determinator (130) to a low power consumption mode.
摘要:
A low subthreshold leakage current, p-channel HFET including a GaAs supporting substrate with a first GaAs buffer layer and a first Al.sub.0.75 Ga.sub.0.25 As diffusion barrier layer formed thereon and a low temperature grown layer, including one of GaAs and AlGaAs, grown at 200.degree. C. on the first diffusion barrier layer. A second Al.sub.0.75 Ga.sub.0.25 As diffusion barrier layer is positioned on the low temperature grown layer and a second GaAs buffer layer is grown on the second diffusion barrier layer. A p-channel HFET is formed on the second buffer layer.
摘要翻译:低亚阈值漏电流,p沟道HFET,包括具有第一GaAs缓冲层的GaAs支撑衬底和形成在其上的第一Al 0.75 Ga 0.25 As扩散阻挡层,以及包括GaAs和AlGaAs中的一种的低温生长层,其生长在 在第一扩散阻挡层上为200℃。 第二Al 0.75 Ga 0.25 As扩散阻挡层位于低温生长层上,第二GaAs缓冲层生长在第二扩散阻挡层上。 在第二缓冲层上形成p沟道HFET。
摘要:
A method (200) and apparatus (100) for calibrating a global positioning system oscillator is disclosed. The apparatus may include a global positioning system receiver (120), a temperature compensated oscillator (130) coupled to the global positioning system receiver, a controller (140) coupled to the global positioning system receiver, and an offset module (150) coupled to the controller. The controller can control the operations of the apparatus. The offset module can send a calibration signal to the global positioning system receiver using values corresponding to an oscillator frequency rate of change vs. time.
摘要:
A mobile wireless communication device (200) including a wireless transceiver (210) communicably coupled to a processor (220), a satellite positioning system receiver (250), wherein the processor controls an operating mode of the satellite positioning system receiver based on satellite positioning system operating mode information received by the wireless transceiver when the mobile wireless communication device is in a vicinity of a location or will be in the vicinity on which the satellite positioning system operating mode information is based. Controlling the operating mode includes controller whether and when and the frequency with which location measurements are made.
摘要:
A method (200) and apparatus (100) for calibrating a global positioning system oscillator is disclosed. The apparatus may include a global positioning system receiver (120), a temperature compensated oscillator (130) coupled to the global positioning system receiver, a controller (140) coupled to the global positioning system receiver, and an offset module (150) coupled to the controller. The controller can control the operations of the apparatus. The offset module can send a calibration signal to the global positioning system receiver using values corresponding to an oscillator frequency rate of change vs. time.