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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Sundaresan, K. Brouse, K.C. U-Yen, K. Ayazi, F. Allen, P.E. |
| Copyright Year | 2003 |
| Description | Author affiliation: Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA (Sundaresan, K.) |
| Abstract | This paper reports on the design and implementation of a process, temperature and supply compensated 7-MHz clock oscillator in a 0.25 /spl mu/m, double poly, 5-metal CMOS process. The clock generator is based on a 3-stage differential ring oscillator. The compensation technique incorporates a unique combination of a process corner sensing scheme and a temperature compensating network to appropriately change the control voltage of the differential ring oscillator. Measurements made across a temperature range of -40/spl deg/C to 125/spl deg/C and 64 samples collected over 3 runs indicate an average variation of /spl plusmn/0.82% (/spl plusmn/46 ppm//spl deg/C) in the clock frequency with temperature, /spl plusmn/2.1% with process across chips at room temperature, and a worst-case combined variation of /spl plusmn/2.6% (with process, temperature and supply). The variation of frequency with power supply was /spl plusmn/0.31% for a supply voltage range of 2.4-2.75 V. The measurement results are in good agreement with the simulation results. The oscillator is intended to serve as a start-up clock for microcontroller applications. |
| Sponsorship | IEEE Circuits & Syst. Soc Mahanakorn Univ. Technol |
| File Size | 283944 |
| File Format | |
| ISBN | 0780377613 |
| DOI | 10.1109/ISCAS.2003.1205658 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2003-05-25 |
| Publisher Place | Thailand |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Clocks CMOS process Temperature sensors Temperature distribution Ring oscillators Frequency measurement Semiconductor device measurement Temperature control Voltage control Voltage-controlled oscillators |
| Content Type | Text |
| Resource Type | Article |
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