Patent ID: 7567792
Filing Date: 2009-07-28
Classification: G06K

Abstract:
1. A method for controlling a power supply of a mobile data memory, said mobile data memory operable to communicate via wireless data transfer using an antenna, the mobile data memory comprising at least one energy accumulator, a data demodulator, a data processing unit and an electronic memory, the method comprising: a) switching to a standby mode from a full operation mode, the standby mode having a lower energy supply than the full operation mode; wherein the switching is performed by a set of switches, and wherein each switch is assigned to and controls a separate component of the mobile data memory, wherein in the full operation mode a first data is received and evaluated for validity, and wherein the energy supply is switched by the set of switches to the standby mode after the first data is received and identified as being valid and prior to completing the wireless data transfer, b) receiving a signal during the standby mode; and c) evaluating the received signal to detect at least one predetermined backscatter frequency and an associated communication frequency, and d) reconnecting the at least one energy accumulator by switching to the full operation mode to transfer a second data after detecting the at least one predetermined backscatter frequency and the associated communication frequency.