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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Yanmei Wang Pak Kwong Chan King Ho Li |
| Copyright Year | 2014 |
| Description | Author affiliation: Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore (Yanmei Wang; Pak Kwong Chan) || Temasek Labs., Nanyang Technol. Univ., Singapore, Singapore (King Ho Li) |
| Abstract | This paper presents a 1MHz ring oscillator with simple temperature compensation circuit dedicated to MEMS sensor applications. A closed-loop PTAT voltage source follower coupled with an open-loop replica-biased source follower driving structure is proposed to power the CMOS ring oscillator and counteract its temperature-dependent effect. In conjunction with a pseudo-resistor based low-pass filter to lower the circuit noise, it significantly improves the jitter performance. The circuit is realized using 0.35μm CMOS technology at a 5V supply. The frequency variation of the compensated oscillator over the temperature range of - 40°C to +90°C is - 0.1% to +0.19% (22.3ppm/°C) with respect to the uncompensated frequency variation of -- 12.1% to +21.6% (2592ppm/°C) at typical process. For worst case process, the frequency deviates from - 1.5% to +1.9% for the stated temperature span and it deviates from - 1.2% to +1.2% at ±10% supply variation under 1 MHz oscillation frequency. The proposed ring oscillator is insensitive to the PVT variations. The simulated cycle-to-cycle RMS jitter value due to both the intrinsic circuit noise and the 200mV peak-to-peak power supply noise is only 64ps, which is about 50 times smaller than that of the standard ring oscillators under identical process technology and design conditions. |
| Sponsorship | IEEE Comput. Soc. |
| Starting Page | 267 |
| Ending Page | 272 |
| File Size | 246056 |
| Page Count | 6 |
| File Format | |
| e-ISBN | 9781479937653 |
| DOI | 10.1109/ISVLSI.2014.15 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2014-07-09 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Noise Ring oscillators Temperature Jitter Power supplies Temperature dependence jitter performance ring oscillator temperature compensation source follower supply noise |
| Content Type | Text |
| Resource Type | Article |
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