High-frequency MOS digital capacitor

Passive sensors network for temperature detection

“…Voltage variable capacitors or varicaps have found a wide range of applications such as voltage controlled oscillators, tunable integrated circuits, FM deviators, and specific tuning elements [9], [10] , etc. In General, such capacitors are twoterminal elements realized with a p-n junction or MOS structure and their capacitance variation with voltage depends on the principle that the depletion width either at the p-n junction or at the semiconductor-insulator interface in the deep depletion mode can be controlled electrically.…”

An Analog Filter Bank-based Circuit for Performing the Adaptive Impedance Matching in PLC Systems

“…Also, [20] discussed a voltage controllable inductance circuit, which is composed of an operational amplifier, for performing impedance matching through the use of a voltage controllable inductance circuit. In [21], the authors emphasized the benefits of active inductors over a tapped transformer and the use of a digital variable capacitor controlled by a microcontroller. Transformerless impedance matching circuits combined with capacitor banks and active inductor topologies were proposed in [22].…”