Package Aware LC-VCO With Self-Biased Switched Capacitor Structure For Better Supply Noise Rejection

Purushothama Chary, P. and Peerla, Rizwan Shaik and Pula, Bhanu Teja and Dutta, Ashudeb and et al, . (2022) Package Aware LC-VCO With Self-Biased Switched Capacitor Structure For Better Supply Noise Rejection. IEEE Transactions on Components, Packaging and Manufacturing Technology. pp. 1-8. ISSN 2156-3950

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Abstract

This paper proposes a packaged standalone LC-VCO based on self-biased switched capacitor array (SCA) to facilitate large frequency tuning-range. The proposed self-biased SCA achieves better supply noise rejection and is robust to QFN package parasitics when compared with other existing SCA topologies without compromising the quality-factor of the SCA in . A prototype self-biased SCA based LC-VCO designed and fabricated in UMC 65-nm CMOS process, oscillates from 1.54 GHz to 2.54 GHz having a tuning range (TR) of 40% achieving a PN of ≈ -96 dBc/Hz at 100 offset and hence an FoM of ≈ 174 dBc/Hz at 100 offset while consuming 10 of power from 2.5 supply, thereby making it ideal for applications requiring QFN packaged standalone VCOs. IEEE

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