摘要:
A wireless communication device (50) can include a radio frequency transceiver (52), an audio drive circuit (58) coupled to the transceiver, a speaker (10) having a voice coil (16) coupled to the audio drive circuit, and an antenna feed or radiating circuit (20) such as an RFID or NFID circuit coupled to the voice coil for at least radiating or receiving an electromagnetic signal via the voice coil. Such radiating circuits can be coupled to the voice coil using a band pass circuit designed to substantially prevent a radiating signal from the radiating circuit from interfering with audio drive circuit driving the speaker. The wireless communication device can further include an antenna (54) coupled to the radio frequency transceiver. Note, this arrangement can be designed to avoid problems involving electrostatic discharge sensitivity, electromagnetic interference coupling between the antenna and the voice coil, total radiated power, and specific absorption rate.
摘要:
A communication device (102) has a loudspeaker (212) that includes a loudspeaker coil. The loudspeaker is used for playing audio signals and for detecting metal in the vicinity of the loudspeaker. To detect metal the communication device includes a pulse generation circuit (216) for generating pulses that are applied to the loudspeaker, and a pulse measurement circuit (222) for measuring response pulses. If the response pulses indicate metal is in proximity to the loudspeaker, an alert is generated to inform the user of the communication device.
摘要:
A wireless device (100) includes an electrical circuit arrangement (200) for deterring access to an electrical signal having a predictable electrical pattern. The circuit arrangement (200) includes a processor (206) for processing instructions and a controller (210) communicatively coupled to the processor (206) and able to send at least one signal along each of a plurality of signal lines from within the circuit (200). The processor (206) causes the controller (210) to sporadically introduce a signal onto each of the plurality of signal lines, where the signal is unrelated to any communication function of the wireless device and is present solely for the purpose of making the signal line unpredictable.
摘要:
A portable electronic device and a method to protect the portable electronic device from a battery bounce are provided. The portable electronic device (100) can comprise a free-fall condition sensor (105) enabled to detect a pre-battery bounce condition in the portable electronic device and a processor (110) coupled to the free-fall condition sensor (105). The processor (110), in response to a detection of the pre-battery bounce condition by the free-fall condition sensor (105), can be programmed to place the portable electronic device (100) in a pre-battery bounce setting. The method can include detecting a pre-battery bounce condition in the portable electronic device (405) and in response to the detection of the pre-battery bounce condition (405), placing the portable electronic device in a pre-battery bounce setting (410).
摘要:
A device (100) has a charging system (102) for coupling to a charger (103) operating in a vehicle, and a processor coupled to the charging system. The processor is programmed to detect (202) a charging state while a user of the device is operating the vehicle, and detect (204-208) an act by the user to exit the vehicle.
摘要:
A mobile communication device (100) includes a volatile memory (110) and a non-volatile memory (112). Instruction code for operating the mobile communication device is permanently stored in the non-volatile memory, and copied to the volatile memory for execution. The mobile communication device enters a hibernate mode which involves shutting down most of the mobile communication device except power to the volatile memory, which allows a nearly instant apparent start up of the mobile communication device at a later time.
摘要:
A charging system (108) supplies a source voltage (Vco, FIG. 5) and a source current (Ico, FIG. 5) to a plurality of battery cells (110). The charging system operates according to a method (200) including the steps of determining (202) a capacity for each of the plurality of battery cells (120 and 130), determining (204) a desired cutoff current (Ico1, FIG. 5) for a select one of the plurality of battery cells (120) having the smallest capacity, determining (206) an optimal source cutoff current according to the capacity of the select one of the plurality of battery cells, adjusting (208) the source current according to the optimal source cutoff current, and periodically applying (209) the source current after reaching the optimal source cutoff current.
摘要:
A device (100) comprises a charging system (102) supplying a source voltage and a source current to one or more battery cells (104). The device operates according to a method 200-300 including the steps of tracking (202) when a user removes a charger from the charging system, determining (204-212) a charging profile from the tracking step, and applying (300-312) the charging profile to the charging system to maximize charging of the one or more battery cells.
摘要:
A battery pack (104) has an inductive charging interface (112) for charging a battery cell (114) upon coupling to an inductive power supply (210). The battery pack is coupled to a mobile communication device via a radio interface (110), through with a voltage level is applied to a charge monitoring circuit (106). When the mobile communication device is powered off, the voltage level wakes up the charge monitoring circuit so that the charging status of the battery cell can be displayed on the mobile communication device.
摘要:
The invention concerns an accessory (112) for coupling to a portable electronic device (110). The accessory includes an interface (120) for coupling to the portable electronic device, an identifier (124) in which the identifier generates at least in part a parameter and at least one speaker (128). Only if the accessory contains more than one speaker, the parameter generated at least in part by the identifier causes an audio amplifier (148) that drives one of the speakers to be activated. In addition, the parameter generated at least in part by the identifier can cause the audio amplifier to be deactivated if the accessory contains only one speaker.