A high compliance CMOS current source for low voltage applications

This paper presents a novel CMOS current source suitable for low voltage applications. The new design shows better compliance voltage than the simple two transistor current mirror while offering improved accuracy and output impedance, featuring 140 K/spl Omega/ output resistance at an output voltage of 30 mV and output current of 30 /spl mu/A. The circuit has been manufactured in a 0.25 /spl mu/m, 2.5 V power supply digital CMOS process from STMicroelectronics.