Print Email Facebook Twitter A Switched-Capacitor DC-DC Converter Powering an LC Oscillator to Achieve 85% System Peak Power Efficiency and -65 dBc Spurious Tones Title A Switched-Capacitor DC-DC Converter Powering an LC Oscillator to Achieve 85% System Peak Power Efficiency and -65 dBc Spurious Tones Author Urso, A. (TU Delft Bio-Electronics) Chen, Y. (TU Delft Electronic Instrumentation) Staszewski, R.B. (TU Delft Electronics) Dijkhuis, Johan F. (Holst Centre) Stanzione, Stefano (Holst Centre) Liu, Y. (TU Delft Bio-Electronics) Serdijn, W.A. (TU Delft Bio-Electronics) Babaie, M. (TU Delft Electronics) Date 2020 Abstract In this paper, we propose a new scheme to directly power a 4.9-5.6GHz LC oscillator from a recursive switched-capacitor DC-DC converter. A finite-state machine is integrated to automatically adjust the conversion ratio and switching frequency of the converter such that its DC output voltage is within ±5% of the desired 1V across input voltage range 1.3-2.2V and < 2mA load current conditions. A gate-driver circuit is embedded in each switch of the converter to guarantee constant on-resistance across PVT variations without sacrificing device reliability. Furthermore, a spur reduction block (SRB) is embedded in the oscillator to suppress the ripple induced spurs by stabilizing its tail current. Both the converter and the oscillator are implemented in 40-nm CMOS technology. The measured peak power efficiency of the converter is 87%, while its spot noise is < 1.5nV/Hz which does not degrade the phase noise of the oscillator. The SRB suppresses the spur to <-65dBc under the 30mVpp ripple of the converter. Subject LC oscillatorLDO replacementSwitched-capacitor DC-DC convertergate-driver circuitphase noisespur reduction blockvoltage controlled oscillator (VCO) To reference this document use: http://resolver.tudelft.nl/uuid:074a4232-5768-41bc-8961-b473e651b0f9 DOI https://doi.org/10.1109/TCSI.2020.3012106 ISSN 1549-8328 Source IEEE Transactions on Circuits and Systems Part 1: Regular Papers, 67 (11), 3764-3777 Bibliographical note accepted author manuscript Part of collection Institutional Repository Document type journal article Rights © 2020 A. Urso, Y. Chen, R.B. Staszewski, Johan F. Dijkhuis, Stefano Stanzione, Y. Liu, W.A. Serdijn, M. Babaie Files PDF 09162442.pdf 7.66 MB Close viewer /islandora/object/uuid:074a4232-5768-41bc-8961-b473e651b0f9/datastream/OBJ/view