Supplementary MOSFET-C transimpedance mode filters for wireless systems

In this study, MOS-Only transimpedance mode filters are proposed. The presented circuits use two capacitors and MOS transistors that operate in saturation mode. The circuits are additional examples contributing to the set of previously published circuit topologies. One of the circuits is chosen and its functionality is verified with simulations. An important aspect of the chosen design is the versatility of filter parameters. Changing the drain currents of MOSFETs makes it possible to adjust the center frequency after production. We performed simulations with the LTSPICE simulation program using 0.18 μm TSMC CMOS technology. Simulation results are found in close agreement with the theoretical results.