A technology compensated current reference in standard CMOS

An accurate current reference that compensates also for process variations is presented and realized in a 0.18 mu m technology. This new concept allows tracking of oxide thickness in integrated MOS capacitors. The circuit uses SC-technique and adaptive biasing, together with inherent compensation. It is shown that 2-3% of accuracy over full process and temperature range can be achieved. Results for a different foundry are presented, too. The. resistorless design is simple and suitable for low voltage. Power consumption is only 7.7 mu A.