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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Hsuan-Wen Peng Chung-Hsin Su Chao, P.C.-P. Jing-Wen Hsieh Chun-Kai Chang |
| Copyright Year | 2014 |
| Description | Author affiliation: Dept. of Electr. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan (Hsuan-Wen Peng; Chao, P.C.-P.; Jing-Wen Hsieh; Chun-Kai Chang) || Sitronix Technol. Corp., Taipei, Taiwan (Chung-Hsin Su) |
| Abstract | This paper presents a 16-MHz digital-controlled crystal oscillator and a time-domain temperature sensor design to achieve a high precision temperature-compensated crystal oscillator in a low-power mobile device. The digital-controlled crystal oscillator is based on Pierce topology with two 8-bit switched-capacitor arrays and the temperature of it is measured by time-domain temperature sensor. For noise reduction, the supply voltages of digital-controlled crystal oscillator and time-domain temperature sensor are regulated at 1.2 V by using two on-chip low-dropout regulators. The proposed circuit design has been successfully fabricated by using TSMC 0.18-μm CMOS process, where the active area is 0.516 $mm^{2}.$ The measured startup time of fabricated 8-bit digital-controlled crystal oscillator is about 0.35 ms and the measured phase noise of 1 kHz offset at 25°C is -119.93 dB/Hz. With temperature compensation, the frequency deviation of it is within +/- 0.08 ppm over -40°C to 85°C. The measured effective temperature resolution of time-domain temperature sensor is 0.45 °C/LSB and the measured error is within -6.3°C to 7.1°C at 10 Hz conversion rate. The measured current consumption of chip is about 2 mA. |
| Starting Page | 225 |
| Ending Page | 228 |
| File Size | 972913 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781479901623 |
| DOI | 10.1109/ICSENS.2014.6984974 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2014-11-02 |
| Publisher Place | Spain |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Temperature measurement Temperature sensors Crystals Oscillators Time-domain analysis Semiconductor device measurement Frequency measurement Temperature sensor Crystal oscillator Digital control Temperature compensation Low power Delay cell |
| Content Type | Text |
| Resource Type | Article |
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