Patent ID: 8138738

Claim:
Method for regulating the supply voltage Uo of an electronic circuit, according to which method a regulating element with variable resistivity that conducts a supply current for the electronic circuit in a regulating circuit and to an input terminal of which an outer supply voltage Ui is applied, is controlled by an amplified difference between a reference voltage and a part of a regulated supply voltage Uo, characterized in that an instant, on which the regulating circuit and the electronic circuit start operating, is detected, that such value of the reference voltage is set on said instant of the operation start that the regulated supply voltage Uo will equal a maximum allowable supply voltage of the electronic circuit and the supplied electronic circuit puts itself in a state of a maximum current consumption, that an operating voltage drop (Ui-Uo)w across said regulating element is measured at regular time intervals and the reference voltage is then each time reduced by one degree until said operating voltage drop (Ui-Uo)w is below or equals a chosen most appropriate value (Ui-Uo)optim of said operating voltage drop, and that the supplied electronic circuit puts itself in a state of a normal current consumption, when said operating voltage drop (Ui-Uo)w has exceeded the chosen most appropriate value (Ui-Uo)optim of said voltage drop.