The Design of Low Power 16-band Non-uniform Filter Bank for Hearing Aids.

A computationally efficient, low power (107.6μ[email protected]), small core area (2.82 mm 2 0.35μm), 16-band nonuniformly spaced digital filter bank with stop-band attenuation of more than 60dB is designed and implemented for hearing aid applications using 0.35μm CMOS process. The low computational complexity of the filter bank is achieved using Frequency Response Masking (FRM) technique with multiple band-edge shaping filters. The proposed filter bank yields significant improvements in both power consumption and group delay. By coefficient sharing scheme, the implementation of such a filter bank requires only 3 multipliers.