A 1.6MHz Swing-Boosted Relaxation Oscillator with ±0.15%/V 23.4ppm/°C Frequency Inaccuracy using Voltage-to-Delay Feedback
In: 2019 IEEE International Symposium on Circuits and Systems (ISCAS), 2019-05-01
Online
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Zugriff:
This paper presents a relaxation oscillator for on-chip clock reference or sensor interface application. To improve the frequency stability over temperature and supply variations, a voltage-to-delay feedback is proposed to compensate the circuit delay variation. In addition, a switch-capacitor swing boosting (SCSB) circuit is proposed to enhance the output swing for phase noise reduction. Implemented in 0.18-μm CMOS process, the proposed oscillator shows a 1.6MHz output frequency, with low frequency inaccuracy of 23.4ppm/°C across 0°C–90°C and ±0.15%/V over 1.2V–1.52V. The measured phase noise is −118.6dBc/Hz at 100kHz offset, corresponding to 156dBc/Hz FOM. The oscillator consumes 51.4μW under 1.3V supply voltage.
Titel: |
A 1.6MHz Swing-Boosted Relaxation Oscillator with ±0.15%/V 23.4ppm/°C Frequency Inaccuracy using Voltage-to-Delay Feedback
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Autor/in / Beteiligte Person: | Gao, Yuan ; Zhou, Wei ; Wang Ling Goh |
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Zeitschrift: | 2019 IEEE International Symposium on Circuits and Systems (ISCAS), 2019-05-01 |
Veröffentlichung: | IEEE, 2019 |
Medientyp: | unknown |
DOI: | 10.1109/iscas.2019.8702607 |
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