A low complexity digital frequency calibration with high jitter immunity for ultra-low-power oscillators
| Autor: | M. Scholl, R. Wunderlich, S. Heinen |
|---|---|
| Jazyk: | German<br />English |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Advances in Radio Science, Vol 17, Pp 145-150 (2019) |
| Druh dokumentu: | article |
| ISSN: | 1684-9965 1684-9973 |
| DOI: | 10.5194/ars-17-145-2019 |
| Popis: | This paper presents a highly efficient digital frequency calibration method for ultra-low-power oscillators in wireless communication systems. This calibration method locks the ultra-low-power oscillator's output frequency to the reference clock of the wireless transceiver during its send- and receive-state to achieve frequency stability over process variation and temperature drifts. The introduced calibration scheme offers high jitter immunity and short locking periods overcoming frequency calibration errors for typical ultra-low-power oscillator's by utilizing non-linear segmented feedback levels. In measurements the proposed calibration method improves the frequency stability of an ultra-low-power 32 kHz oscillator from 53 to 10 ppm ∘C−1 over a wide temperature range for temperature drifts of less than 1 ∘C s−1 with an estimated power consumption of 185 nW while coping with relocking periods of 7 ms. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|