Patent ID: 7248099

Claim:
A circuit for generating reference current comprising: a current providing unit for generating a PTAT current, mirroring the PTAT current to generate an analogous PTAT current, and generating an analogous BGR current; a current ratio control unit for receiving the analogous BGR current, the PTAT current and the analogous PTAT current from the current providing unit to generate an analogous BGR current in a first ratio, a PTAT current in a second ratio and a current corresponding to the difference between the analogous PTAT current in the second ratio and the analogous BGR current in the first ratio; and a current increasing/decreasing unit for receiving the analogous BGR current in the first ratio, the PTAT current in the second ratio and the current corresponding to the difference between the analogous PTAT current in the second ratio and the analogous BGR current in the first ratio from the current ratio control unit, and increasing/decreasing the analogous BGR current in the first ratio, the PTAT current in the second ratio and the current corresponding to the difference between the analogous PTAT current in the second ratio and the analogous BGR current in the first ratio to generate a BGR current in the first ratio.