Low-Power Highly Selective Channel Filtering Using a Transconductor-Capacitor An

Abstract

Analog finite-impulse-response (AFIR) filtering is proposed to realize low-power channel selection filters for the Internet-of-Things receivers. High selectivity is achieved using an architecture based on only a single—time-varying— transconductance and integration capacitor. The transconduc- tance is implemented as a digital-to-analog converter and is programmable by an on-chip memory. The AFIR operating principle is shown step by step, including its complete trans- fer function with aliasing. The