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- W3012360059 abstract "This paper presents and compares two inherently different LC-VCO architectures for the down-conversion in a offset-PLL. The cross-coupled VCO architecture, which is unpopular in mmW SiGe applications, is compared to the commonly used Colpitts architecture. The two VCOs are fabricated with a supply voltage of 3.3 V in a modern 130 nm SiGe BiCMOS technology with HBTs offering an $f_{mathrm{T}}$ of 250 GHz and $f_{max}$ of 370 GHz. For easier characterization and stabilization in a PLL the same static divide-by-4 chain is added to both VCO chips. The main purpose of this work is the integration of a VCO as a downconverter for a offset-PLL with good phase noise and low power consumption at the same time. At an offset of 1 MHz the Colpitts VCO achieves a phase noise of −108 dBc/Hz at 56 GHz and the cross-coupled VCO achieves a phase noise of −100 dBc/Hz at 68 GHz, respectively. Relative frequency tuning ranges (rFTR) of 26% for the Colpitts type and 43.7% for the cross-coupled VCO are reached." @default.
- W3012360059 created "2020-03-23" @default.
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- W3012360059 date "2020-01-01" @default.
- W3012360059 modified "2023-10-14" @default.
- W3012360059 title "Investigation of Integrated mmW-Downconverter VCOs in SiGe for Offset-PLL FMCW-Transceivers" @default.
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- W3012360059 doi "https://doi.org/10.1109/sirf46766.2020.9040181" @default.
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