CMOS CMOS Composite Varactoy-Based Linear Small-Area Tunable Capacitor

摘要

The present invention arranges a high linearity and a wide variable range by arranging an accumulation-mode varactor or an inversion-mode varactor in an array and controlling according to digital on/off. It relates to a tunable capacitor based on a CMOS complementary collector element that can be secured. The present invention is effective in solving the Q-factor degradation problem by arranging varactor elements in an array and controlling digital on/off to secure high linearity and a wide variable range. In addition, the present invention is arranged in a connection and array so that the accumulation-mode varactor or inversion-mode varactor is complementarily operated in a standard digital CMOS process, and is controlled by digital on/off. By doing so, there is an effect that can achieve the same performance with a small silicon area.