Abstract: An electronics device (100), for example, a cellular telephone, includes a plurality of discrete transducers, one of which is a dynamic loudspeaker device (162) and the other being a linear vibrating device (164). In another embodiment, two or more linear vibrators within device housing are driven with signals having different frequency and/or time variant characteristics to provide different sensory effects for the user.
Abstract: Method in a Global Positioning System (GPS) receivers, including determining pseudorange (PNR) measurements for at least four satellites (210), determining a coarse time (220) corresponding to the pseudorange measurement, determining an offset time (240) between a periodic GPS event of one of the four satellites and the coarse time, determining a time correction delta (250) based upon the period of the Periodic GPS event, the offset time and the coarse time if an error of the coarse time is less than ½ the period of the periodic GPS event, and determining corrected time (260) based upon the coarse time and the time correction delta if the error of the coarse time is less than ½ the period of the periodic GPS event.
Type:
Grant
Filed:
March 28, 2002
Date of Patent:
September 13, 2005
Assignee:
Motorola, Inc.
Inventors:
Thomas Michael King, George Jeffrey Geier, Rodney Patrick Landers, Michael Joseph Slade, Paul DeClerck
Abstract: RF amplifier control circuits for transmitters in mobile communication devices, combinations thereof and methods therefor. The control circuits include generally proportional and integral control circuits having an output coupled to a control input of an amplifier. An initial control signal is applied to the amplifier before a vector modulator output coupled an input thereof is at full output power. The vector modulator output is ramped to full output after applying the initial control signal. Thereafter, the initial control signal applied to the amplifier during ramping is corrected by integrating an output of the amplifier relative to a second reference signal with an integral control circuit coupled to the control input of the amplifier, the second reference signal is proportional to the ramping vector modulator output.