BandGap-CurrentRefBandgap Current Reference (RQE Submission) Matthew C. Guyton and Hae-Seung Lee, MIT March 13, 2003 Abstract A simple low-power current source with low sensitivity to temperature and power-supply is presented. Implemented in a 0.35um CMOS process, the 2-terminal circuit directly produces a bandgap-referenced output current without the use of an operational amplier. This design requires no excess biasing current. The designed current source employs 6 transistors and 3 resistors. It exhibits 142ppm/degC over a 5-50 degC range. Output resistance is 350kOhm. Power consumed is 160uW measured at 80uA nominal output current and 2V supply. The same basic design can be used to generate non-integer multiples of bandgap voltage without an op-amp. 1 Introduction Most analog circuits require referen……