| Autor: |
David Wee, Simon Ng, Seong-Jin Kim, Yoon Hwee Leow, Sie Boo Chiang, Fan-Yung Ma |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
ISIC |
| DOI: |
10.1109/isicir.2014.7029477 |
| Popis: |
This paper presents the design of a BJT-based remote temperature sensor to measure ambient temperature in different locations. The sensor chip supplies a calibrated current to the external devices, which are common off-the-shelf bipolar junction transistors — 2N3904 (NPN) and 2N3906 (PNP), and converts their base-emitter voltages to temperature using a 13-bit charge-balancing ΣΔ modulator. Dynamic element matching, correlated double sampling and system-level chopping techniques are deployed to reduce temperature errors due to non-ideal effects of CMOS readout circuitry. A prototype sensor has been fabricated using 0.13-μm CMOS process. Measurement results show that the temperature sensor inaccuracy is ±2 °C from −40 °C to 125 °C. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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