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A compact high-value floating resistor utilising PMOS devices in the subthreshold region is introduced. A test chip has been fabricated in 0.18 um CMOS technology to verify the proposed concept. This technique has been applied to design a reconfigurable sixth-order very-low cutoff-frequency MOSFET-C filter.
Mihai Adrian Ionescu, Jürgen Brugger, Ali Saeidi, Xia Liu, Carlotta Gastaldi, Sadegh Kamaei Bahmaei, Yingfen Wei