Abstract: A novel and useful high-order discrete-time charge rotating (CR) infinite impulse response (IIR) low-pass filter is presented. The filter utilizes capacitors and a gm-cell, rather than operational amplifiers, and is thus compatible with digital nanoscale technology. A 7th-order charge-sampling and 6th-order voltage-sampling discrete time filter is disclosed. The order of the filter is easily extendable to higher orders. The charge rotating filter is process-scalable with Moore's law and amenable to digital nanoscale CMOS technology. Bandwidth of this filter is precise and robust to PVT variation. The filter exhibits very low power consumption per filter pole, low input-referred noise, wide tuning range, excellent linearity and low area per minimum bandwidth and filter pole.