Electronic device with an operative mode and an energy-saving standby mode, and method for switching between these two modes

(57) The antenna element (1) by the side of the input for receiving a summary information carrier signal, The feed voltage unit (6) for offering the reception unit (5) for processing the basic information given to the signal, and the service voltage needed in order to operate, And in the electron device which it has, the stillness mode which saves operational mode and energy equipped with the change unit for switching operational mode and stillness mode by one side, In order to conform to demand and to secure the positive change to operational mode from the stillness mode which minimizes the power consumption in stillness mode and saves another side and energy quickly, Two or more frequency bands (Fg, Fa) by which the information carrier signal was modulated are included, It is provided for the basic information (g) by which at least one (Fg) of frequency bands of they should be processed by the reception unit (5), and in order that other frequency bands (Fa) may control a change unit (4), it is shown that alarm clock information (a) is included.