An Embedded All Digital Temperature Sensor with Adjustable Sensitivity

In this paper, a linear digital temperature-sensitivity-dependent pulse width adjustable sensitivity full-digital embedded temperature sensor is proposed. The synchronously adjusted circuit will not change the temperature sensor’s resolution when the temperature sensitivity is adjusted. The circuitry proposed in this paper is designed in CMOS 90 nm process. The measurement temperature range is 0 °C~100 °C, the adjustable temperature sensitivity range is 32 k-pulse /°C ~ 250 k-pulse/°C, the temperature resolution is maintained at 0.1 °C, and the minimum power consumption is about 110 μW. And the temperature sensitivity setting function is verified by a 25 k Logic Element FPGA.