Abstract: A smart watch includes a watch casing with a display disposed along the watch casing. One or more processors are operable with the display. An energy storage device powers the one or more processors. When an amount of stored energy in the energy storage device is above a predefined threshold, the one or more processors perform a timekeeping function and at least one additional function. When the amount of stored energy in the energy storage device falls below the predefined threshold, the one or more processors disable the at least one additional function while continuing to perform the timekeeping function.

Abstract: A portable electronic device includes a motion sensor and a controller. The motion sensor detects an alternating signature motion of a limb of the user about a virtual axis corresponding to the limb. The motion sensor may be an accelerometer capable of detecting three dimensional acceleration. The accelerometer detects acceleration along X, Y and/or Z axes, in which acceleration peaks of the X and Z axes alternate with each other and acceleration of the Y axis remains substantially steady relative to the X and Y axes. The portable electronic device controls at least one function based on the detected alternating signature motion of the limb and/or acceleration along the X, Y and/or Z axes.

Abstract: Implementations relate to systems and methods for generating compensated speed values for a Doppler-enabled device. A portable wireless device can contain a GPS navigation engine (110) to capture position data (120) and Doppler speed data (118) from positioning satellites. The device can also generate position-based speed values from successive position readings and time intervals, to determine the current speed independently of the Doppler-based speed values. During degraded signal conditions, the Doppler-based speed values can drop to invalid levels. The device incorporates a combiner module (450) which compares the position-based and Doppler-based speed values and performs combination operations on those quantities to produce a compensated speed value (490). By selecting the maximum or otherwise combining those values, extreme excursions in speed values are avoided and accuracy promoted.

Abstract: A pedometer or other stride-detection device (304) can record the number of strides, and the frequencies of those strides, during a running or other session using a detector (306). The device (304) can report an estimated total elapsed distance (318) at the end of the session, based on the number and estimated lengths of each stride. The reported distance can be calculated using estimates for stride lengths at various frequencies based on a user profile (210), as well as a correction value table (308) and a frequency count table (202). At the end of each session, a corrected distance can be received by user input based on a treadmill display, or other means. A frequency-based correction factor can be updated based on an error ratio of the corrected and reported distances, which can be limited by a correction factor limit and distributed based on a stride frequency probability distribution.

Abstract: Implementations relate to systems and methods for generating compensated speed values for a Doppler-enabled device. A portable wireless device can contain a GPS navigation engine (110) to capture position data (120) and Doppler speed data (118) from positioning satellites. The device can also generate position-based speed values from successive position readings and time intervals, to determine the current speed independently of the Doppler-based speed values. During degraded signal conditions, the Doppler-based speed values can drop to invalid levels. The device incorporates a combiner module (450) which compares the position-based and Doppler-based speed values and performs combination operations on those quantities to produce a compensated speed value (490). By selecting the maximum or otherwise combining those values, extreme excursions in speed values are avoided and accuracy promoted.

Abstract: A portable electronic device includes a motion sensor and a controller. The motion sensor detects an alternating signature motion of a limb of the user about a virtual axis corresponding to the limb. The motion sensor may be an accelerometer capable of detecting three dimensional acceleration. The accelerometer detects acceleration along X, Y and/or Z axes, in which acceleration peaks of the X and Z axes alternate with each other and acceleration of the Y axis remains substantially steady relative to the X and Y axes. The portable electronic device controls at least one function based on the detected alternating signature motion of the limb and/or acceleration along the X, Y and/or Z axes.

Abstract: A radiotelephone (100) is coupled to accessory (200) by way of a novel interface provided by connector (190). Accessory (200) is a headset including a microphone (220) and a speaker (230) that may be plugged into a jack in radiotelephone (100) and worn by the user. Accessory (300) provides an RS-233 serial interface for communicating information between radiotelephone (100) and a personal computer (400). Controller (130) of radiotelephone (100) detects the presence of a 10K ohm resistor (202) to determine that accessory (200) is coupled to connector (190), and the presence of a 22K ohm resistor (202) to determine that accessory (300) is coupled to connector (190). When accessories (200) and (300) are detected, a liner regulator (116) is swathed on by controller to provide a 2.7V voltage source for powering accessories (200) and (300).

Abstract: A switching circuit (30) in a portable telephone connects a gate of a field-effect transistor (Q1) to a voltage below the transistor's gate threshold voltage when the voltage at a first power source terminal (B) falls below a threshold voltage, thus disconnecting the first power source terminal (B) from a portable telephone power input terminal (B+) and connecting a second power source terminal (A) to the power input terminal (B+). The threshold voltage is set at a voltage above the minimum supply voltage of the portable telephone. The first power source terminal may be connected to a main battery and the second power source terminal may be connected to an adapter such as a battery eliminator adapter, hands-free adapter, or mobile transceiver adapter. This switching circuit prevents a call in progress from being disconnected when power sources are exchanged during a GSM burst.