Status : Verified
| Personal Name | Fernandez, Ian Christian B. |
|---|---|
| Resource Title | An energy-efficient temperature to digital converter using CMOS thyristors and a subranging time-to-digital converter |
| Date Issued | May 2021 |
| Abstract | Linearity is an important property of temperature sensors. It determines how many calibration points are needed for a sensor to produce an accurate measurement. Delay-based temperature sensors are simpler and consume less energy than voltage-based sensors but suffer in linearity. In this study, we developed a delay-based temperature sensor with linearity near that of voltage-based sensors without the need for a temperature-independent reference circuit. By digitizing a non-linear sensor with a near-linear reference circuit, we can achieve a near-linear response within a limited temperature range. This study then explores the use of two different CMOS thyristor circuits, one with a non-linear temperature response and another with a near-linear temperature response to create a low-energy limited-range linear temperature sensor. As for the digitization circuit, we employed a subranging time-to-digital converter for improved energy efficiency and flexibility compared to the commonly used cycle counter. The designed temperature sensor performs 300 measurements per second with ±0.37C non-linearity error between -30C and 20C with 0.02C per LSB resolution while only consuming 380pJ per conversion. |
| Degree Course | MS Electrical Engineering |
| Language | English |
| Keyword | thyristor; temperature; sensors |
| Material Type | Thesis/Dissertation |
Preliminary Pages
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Category : I - Has patentable or registrable invention of creation.
Access Permission : Limited Access