MOSFET-C Transimpedance Mode Filter

In this study, a MOS-Only Band-Pass transimpedance-mode filter is proposed. The presented circuit uses two capacitors and three MOS transistors that operate in saturation mode as active elements. One important aspect of the design is versatility of filter parameters. By changing drain currents, it is possible to adjust center frequency and quality factor after production. Circuits are biased with a single 1.8V power supply. We performed simulations with LTSPICE simulation program using $0.18\mu \mathrm{m}$ TSMC CMOS technology. Simulation results are found in close agreement with theoretical results.