A 6.42 mW low-power feed-forward FxLMS ANC VLSI design for in-ear headphones

Conventional active noise cancellation (ANC) applications often use high-speed digital signal processors (DSPs) to cancel annoying noise, which result in an expensive cost and high-power dissipation for modern portable devices. To achieve both high-performance and low-power consumption requirements, this paper proposes a dedicated feed-forward filtered-x least mean square (FxLMS) ANC VLSI design for in-ear headphones. The validity of the proposed design is then verified through adopting experiments in an anechoic chamber. Experimental results show that the proposed design can attenuate 15 dB for broadband pink noise with a bandwidth of 50-1500 Hz when operated at 10 MHz clock frequency, at the costs of 84.2 k gates and power consumption of 6.42 mW only.