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A 1.5 +/- 0.39 ppm/degrees C Temperature-Compensated LC Oscillator Using Constant-Biased Varactors
- A 1.5 +/- 0.39 ppm/degrees C Temperature-Compensated LC Oscillator Using Constant-Biased Varactors
- Wang, Yong; Chai, Kevin T. C.; Mu, Xiaojing; Je, Minkyu; Goh, Wang Ling
- DGIST Authors
- Je, Minkyu
- Issue Date
- IEEE Microwave and Wireless Components Letters, 25(2), 130-132
- Article Type
- Clocks; Cmos Integrated Circuits; Frequency Reference; Frequency Source; Oscillator Frequency; Phase-Locked Loop; Phase Locked Loops; Phase Noise; Temperature; Temperature Coefficient; Temperature Compensated; Temperature Compensation; Temperature Drifts; Temperature Sensor; Temperature Sensors; Varactors; Wide Temperature Ranges
- This letter presents a temperature compensated oscillator for clock generation across a wide temperature range. The proposed technique deploys the characteristics of the constant-biased varactors to nullify the overall oscillator's temperature coefficient (TC), thereby reducing the temperature drift effect on the oscillator frequency output. Fabricated on a 0.18 μ m CMOS technology, the proposed 2.09 GHz-gm-LC oscillator sees a mere 1.5 ppm ° C frequency drift from-20 ° C to 120° C. The oscillator consumes 10.9 mW at 1.4 V supply, with phase noise of-119.4 dBc/Hz at a 1 MHz offset. The demonstrated technique is useful for providing accurate clock for a variety of applications, including those operating in harsh environment. © 2001-2012 IEEE.
- Institute of Electrical and Electronics Engineers Inc.
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