Switched-capacitor impedance simulation circuits realized with simplified circuit structure

This paper describes switched-capacitor (SC) inductor and Frequency Dependent Negative Resistor (FDNR) which use unity gain buffer (UGB) in common with another SC circuit to simplify circuit structure. Though common use of UGB has reported in many references, UGB is usually connected to the same nodes and it often suffers simplification of SC circuits. In this paper, UGB is used in common with another SC circuits in a different way and SC inductor with simpler structure is obtained :The circuit is controlled by simple 2 phase control clock. The capacitor value spreads and the sum of capacitor values are small. And the number of capacitor needed is 4. Then this SC inductor is modified to introduce SC FDNR The sum of capacitor values and number of capacitors in the SC FDNR are the smallest value in SC FDNR circuits reported already. To confirm basic operations of circuits proposed, simulation results by SWITCAP are also shown.