Patent ID: 6348744
Filing Date: 2002-02-19
Classification: H02J,H04B,H04W,Y02D

Abstract:
An electronic, portable apparatus configured to be operable by a battery and an external power supply, comprising a power management module and peripheral components, the power management module having input and output ports and being implemented as a single integrated circuit, the power management module comprising:a switching module, comprising a first transistor a second transistor and a switch responsive to a control signal; the switching module configured to select one of several supply voltages for the power management module; a module of voltage regulators, each regulator configured to provide selectively a voltage of a preset value at outputs of the power management module; a first voltage converter, the first voltage converter configured to transform the selected supply voltage to an output voltage having a required value, if the present value of the selected supply voltage is lower than the required value; a power-on-reset module, the power-on-reset module configured to provide for a predefined sequence of activation of the peripheral components; the peripheral devices comprise a radio frequency receiver and a power amplifier; and a logic array module, the logic array module being associated with a communications interface, the logic array module receiving signals for controlling the module of voltage regulators and the power-on-reset module.