Abstract
This paper describes a CMOS voltage reference using only resistors and transistors working in weak inversion, without the need for any bipolar transistors. The voltage reference is designed and fabricated by a 0.18 μm CMOS process. The experimental results show that the proposed voltage reference has a temperature coefficient of 370 ppm/°C at a 0.8 V supply voltage over the temperature range of −35 to 85 °C and a 0.1% variation in supply voltage from 0.8 to 3 V. Furthermore, the supply current is only 1.5 μA at 0.8 V supply voltage.
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