Continuous-Time FIR Filters Based on Frequency-Response Masking Technique

The frequency-response masking (FRM) technique is a computationally efficient method in designing sharp transition-band finite impulse response (FIR) filters. In this paper, a new low power FRM filter structure is proposed for the implementation of continuous-time (CT) filter by utilizing memristor as delay components. The design example shows that a CT FRM high-pass filter designed in a 0.35-mu m CMOS process consumes a total power of 28.0 mu W under a 3.3-V supply, which is about 75.2% lower than the power consumed by an equivalent 168th-order FIR filter achieving the same specifications.