1. Package Aware LC -VCO With Self-Biased Switched Capacitor Structure for Better Supply Noise Rejection.
- Author
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Chary, P. Purushothama, Shaik Peerla, Rizwan, Pula, Bhanu Teja, Dutta, Ashudeb, and Sahoo, Bibhu Datta
- Subjects
CAPACITOR switching ,QUALITY factor ,COMPLEMENTARY metal oxide semiconductors ,PHASE noise ,PHASE-locked loops ,NOISE - Abstract
This article proposes a packaged standalone $LC$ -voltage-controlled oscillator (VCO) based on self-biased (SB) switched capacitor array (SCA) to facilitate large frequency tuning-range (TR). The proposed SB SCA achieves better supply noise rejection and is robust to quad flat no-lead package (QFN) package parasitics when compared with other existing SCA topologies without compromising the quality factor ($Q$ -factor) of the SCA in OFF-state. A prototype SB SCA-based $LC$ -VCO designed and fabricated in United Microelectronics Corporation (UMC) 65-nm complementary metal oxide semiconductor (CMOS) process oscillates from 1.54 to 2.54 GHz having a TR of 40% achieving a phase noise (PN) of $\approx -96$ dBc/Hz at 100 kHz offset and an figure of merit (FoM) of ≈174 dBc/Hz at 100 kHz offset while consuming 10 mW of power from 2.5 V supply, thereby making it ideal for applications requiring QFN-packaged standalone VCOs. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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