The device (12) is used for supplying power to a rapid clocking and/or a rapidly clocked integrated circuit (13), which has a circuit load (17) to be supplied with power and an internal capacity (15) connected parallel to the circuit load (17). The integrated circuit (13) has a high clocking frequency (f1) which is in particular at least in the MHz range. A supply unit (14) which is in particular designed as a current source is directly connected to the internal capacity (15). The supply unit (14) has an internal resistance, the impedance value of which is so high at the clocking frequency (f1) that a current (ID2) which supplies the circuit load (17) originates to a greater degree from the internal capacity (15) than from the supply unit (14).