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Scalable model of substrate resistance components for radio-frequency MOSFETs fabricated by 65-nm CMOS technology with the bar-type body contact set in a horizontal direction to gate poly is presented. We consider various layout dimensions, such as channel length; unit finger width; number of fingers; distance between body contact and active region; and gate poly to gate poly distance on substrate resistance modeling. By using our model, the output admittance of the MOSFETs is well matched up to 50 GHz. The proposed models for substrate resistance are more accurate for devices with various geometries than previous substrate resistance models.Index Terms-Parameter extraction, radio-frequency (RF) MOSFETs, scalable model, substrate resistance network.

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