Abstract: A low-cost power supply is connected to an object circuit and to a dummy load circuit. The object circuit sends a dummy load control signal to the dummy load which indicates the current requirement of the object. The dummy load sources an amount of current as specified by the dummy load control signal such that the total supply current from the power supply is constant. According to an aspect, the dummy load is implemented as MOS or bipolar transistors. The dummy load control signals are either analog or digital. The object may produce multiple dummy load control signals. The object may consist of multiple integrated circuits wherein each integrated circuit produces one or more dummy load control signals. Smoothing elements may be included in the power supply. In an embodiment, the object is a system of integrated circuits including a microprocessor. The system communicates via a communication bus. The microprocessor fetches instructions over the communication bus.