Abstract
The design of a compatible wide-range low-power smart temperature sensor based on the CMOS sub-threshold characteristic is presented for the purpose of on-chip temperature measure and protection from overheating. Simulated with CSMC 0.6 μm mixed-signal CMOS technology, the circuit works well over the temperature range from -50 to 150°C. For the amplifier feedback, it has a high power supply rejection ratio under VDD from 2 to 6 V. Measurements support the simulation result. The temperature sensitivity is 0.77V/°C. The power dissipation of the sensor is 16 μA because the bias current is generated by the CMOS sub-threshold characteristic. The chip area is 300 μm × 250 μm. The characteristics of this sensor make it especially suitable for low-cost high-volume integrated microsystems over a wide range of fields, such as computer, automotive, and biomedical.
Original language | English |
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Pages (from-to) | 1676-1680 |
Number of pages | 5 |
Journal | Pan Tao Ti Hsueh Pao/Chinese Journal of Semiconductors |
Volume | 27 |
Issue number | 9 |
State | Published - Sep 2006 |
Externally published | Yes |
Keywords
- Power supply rejection ratio
- Temperature protecting circuit
- Temperature sensitivity
- Temperature sensor