A 0.85 V CMOS voltage and current reference using SCCTs

A new circuit topology of a voltage and current reference using self-cascode composite transistors and operating with a minimum supply voltage of 0.85 V is proposed in this work. Using nmos-version and pmos-version self-cascode composite transistors, the reference generates a nominal output voltage and current equal to 540 mV and 1.451 µA with temperature coefficients of 20 ppm/°C and 75 ppm/°C, respectively. The considered temperature range was – 30 °C to 100 °C. The circuit was implemented in a standard 0.18 µm n-well CMOS process, with the layout area of 0.175 mm2 (269 µm × 654 µm), and the supply current consumption of 9.1µA.