Patent ID: 7282901

Claim:
Low reference voltage source, whereas the reference voltage Vr is temperature independent, comprising a low voltage-V PTAT source, the voltage V PTAT being proportional to the absolute temperature, characterized in that it comprises a voltage-to-current converter (VCC), comprising the low voltage-V PTAT source and a resistor (R) and a current I at its input across a diode element (t) produces a control potential V, the temperature characteristics of which includes the temperature characteristics from the quotient V PTAT /R between the voltage V PTAT and the resistance of the resistor (R), that a first current generator (t 1 ) and a second current generator (t 2 ), both being controlled by the control potential V, generate a first current I 1 and a second current I 2 , respectively, the temperature characteristics of which include the temperature characteristics of the said quotient V PTAT /R, that the first current I 1 is conducted to a first terminal (X) on a first connection of a composition of series connected first resistor (Ra) and a second resistor (Rb), a second connection of said composition being grounded, that a transistor (T; T′) is diodelike forward connected between the first terminal (X) and the ground, that the second current I 2 is conducted to a second terminal (Y) on a common connection (Z) of the first resistor (Ra) and the second resistor (Rb), that the reference voltage Vr is tapped from the common connection (Z) of the first resistor (Ra) and the second resistor (Rb) and that the first resistor (Ra) and the second resistor (Rb) are manufactured in the n-well technology in the same way as the resistor (R) within the voltage-to-current converter (VCC).