Patent ID: 6933769

Claim:
A circuit comprising: a first supply node for receiving a first supply voltage and a second supply node for receiving a second supply voltage; a current mirror connected to the first supply node for providing a first current to a first internal node and a second current to a second internal node; a first control transistor connected between the first internal node and a second supply node, the first control transistor and a portion of the current mirror forming a path between the first and second supply nodes, wherein the path includes only two transistors; a second control transistor and a resistive element connected in series between the second internal node and the second supply node; an output unit connected to the current mirror, the output unit including at least one output node for providing at least one reference voltage independent from variations in one of the first and second voltages and independent from variations in a temperature range, wherein the reference voltage includes a stable voltage level when one of the first and second supply nodes includes a voltage of about 1.3 volts to about 1.5 volts; and a startup unit connected to the first and second current source transistors and the first and second control transistors for influencing the first current and the second current.