A 68/36ppm/○C Tc 32.768Khz-To-1Mhz Rc-Based Oscillator With 72/6Pj Start-Up Energy
| Autor: | Camilo Rojas, Hector Gomez, Julian Arenas, David S. M. Reyes, Alex Mantilla, Elkim Roa |
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| Rok vydání: | 2019 |
| Předmět: |
Reduction (complexity)
Physics Fine-tuning Sensor node 020208 electrical & electronic engineering 0202 electrical engineering electronic engineering information engineering Node (circuits) 02 engineering and technology Topology Crystal oscillator Temperature measurement Energy (signal processing) Efficient energy use |
| Zdroj: | CICC |
| DOI: | 10.1109/cicc.2019.8780374 |
| Popis: | This paper describes a 32.768kHz-to-1MHz RC-based oscillator (RCO) suitable for high- and low-duty-cycle sleep-mode timers in emerging sensor node applications. In contrast to crystal oscillators (XO) based frequency references which employ long and energy intensive restarts, the proposed RCO achieves a 1000X reduction in restarting time. Measurement shows that the implemented RCO achieves a temperature stability of 68.5ppm/○C @32.768kHz and 37.5ppm/○C @1MHz. A proposed autonomous digital scheme uses coarse and fine tuning to compensate for process and temperature variations. Measurements report an energy efficiency of 1.46nW/kHz@1MHz occupying an area of 0.055mm2 in a pure digital 180nm CMOS process node. |
| Databáze: | OpenAIRE |
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