Patent ID: 7561130

Claim:
A control circuit for regulating current supplied from a source of power to at least one load, comprising: a. a current mirror circuit electrically coupled between the source of power and the at least one load for, regulating current supplied from the source of power to the at least one load at different levels; b. a real-time clock (RTC) circuit adapted for recording real time; and c. a micro control unit (MCU) electrically coupled between the RTC circuit and the current mirror circuit, and configured such that when the real time changes from a first time period to a second time period, the MCU generates one or more control signals to trigger the current mirror circuit to regulate current supplied from the source of power to the at least one load from a first level corresponding to the first time period to a second level corresponding to the second time period; wherein the current mirror circuit comprises: d. a resistor having a first terminal and a second terminal, wherein the first terminal connected to the source of power and a first terminal of the at least one load; e. a first transistor having a base, a collector and an emitter, wherein the collector electrically coupled to both the base and the second terminal of the resistor, and the emitter is grounded; f. N second transistors, N being a positive integer, each second transistor having a base, a collector and an emitter, wherein the base of each second transistor is electrically coupled to the base of the first transistor, and the collector of each second transistor is electrically coupled to a port that is electrically coupled to a second terminal of the at least one load; and g. N electric switch elements, each electric switch element having a gate, a source and a drain, wherein the drain of each electric switch element is electrically coupled to the emitter of a corresponding second transistor, and the source of each electric switch element is electrically coupled to a port that is grounded, and the gate of each electric switch element is electrically coupled to a corresponding output port of the MCU.