Abstract: A radio device comprises a radio transceiver, a resonator, a temperature measurement unit, a frequency synthesiser and a processing system. A temperature signal from the temperature measurement unit, representative of a measured temperature of the resonator, is used to determine an estimated frequency offset for the resonator at the measured temperature using a model stored in a memory of the processing system that relates frequency offset to temperature. A periodic signal from the resonator is provided to the frequency synthesizer, which, in dependence on the estimated frequency offset, is used to generate a periodic local signal. The radio transceiver receives a radio signal comprising a periodic component at a received signal frequency. An error value representative of a difference between the received signal frequency and a frequency of the periodic local signal is determined and used to update one or more parameters of the model stored in the memory.

Abstract: A method in a wireless communication device for diagnosing power supply failure in the wireless communication device is provided. The wireless communication device detects (301) an indication of power supply failure in the wireless communication device. When the indication of the power supply failure further indicates a non-active state of the wireless communication device or when the wireless communication device enters an error handling mode, the wireless communication device collects (302) diagnostic data from the PMU by means of a diagnostic engine (215) in the PMU. The wireless communication device then stores (303) the collected diagnostic data to a memory in the PMU. The data is related to the event resulting in the non-active state and/or to the latest event in a system of the wireless communication device or when the wireless communication device enters an error handling mode.

Abstract: A method in a wireless communication device for diagnosing power supply failure in the wireless communication device is provided. The wireless communication device detects (301) an indication of power supply failure in the wireless communication device. When the indication of the power supply failure further indicates a non-active state of the wireless communication device or when the wireless communication device enters an error handling mode, the wireless communication device collects (302) diagnostic data from the PMU by means of a diagnostic engine (215) in the PMU. The wireless communication device then stores (303) the collected diagnostic data to a memory in the PMU. The data is related to the event resulting in the non-active state and/or to the latest event in a system of the wireless communication device or when the wireless communication device enters an error handling mode.

Abstract: A device has a battery presence detection system. A line charging pulse signal is applied to a terminal battery detection line, which is connected when the battery is present to a ground line via a resistor and a capacitance. A detector determines whether the battery is connected to the mobile terminal based on detecting whether a line voltage edge or a line voltage level on the terminal battery detection line is present.

Abstract: A device has a battery presence detection system. A line charging pulse signal is applied to a terminal battery detection line, which is connected when the battery is present to a ground line via a resistor and a capacitance. A detector determines whether the battery is connected to the mobile terminal based on detecting whether a line voltage edge or a line voltage level on the terminal battery detection line is present.