1 V CMOS current reference with 50 ppm/°C temperature coefficient

A CMOS current reference circuit is presented, which can work properly with a supply voltage higher than 1 V. By compensating the temperature performance of the resistor, this circuit gives out a current with a temperature coefficient of 50 ppm//spl deg/C over the temperature range of (0/spl deg/C, 110/spl deg/C) and a 0.5% variation for a supply voltage of 1 to 2.3 V.

[1]  Willy Sansen,et al.  A CMOS temperature-compensated current reference , 1988 .

[2]  Yann Deval,et al.  Ratiometric temperature stable current reference , 1993 .

[3]  H. Oguey,et al.  CMOS Current Reference without Resistance , 1996, ESSCIRC '96: Proceedings of the 22nd European Solid-State Circuits Conference.

[4]  C.-H. Lee,et al.  All-CMOS temperature independent current reference , 1996 .