his paper introduces and applies practical area-reduction techniques on the analogue, externally linear-internally nonlinear, complementary metal-oxide semiconductor (CMOS) implementation of a cochlear channel. This channel is constructed on the basis of the biomimetic auditory filter called One-Zero Gammatone Filter, and it has been synthesised using ultra-low power Class-AB biquadratic filters, which employ MOS transistors that operate in their weak inversion regime. The realisation of linear capacitors with appropriately configured MOS transistors, the order reduction of the One-Zero Gammatone Filter transfer function and the employment of hyperbolic sine companding filters can lead to area reductions that range from 61.8% up to 91.9% of the original size. Comparative simulation results highlight the trade-offs between performance, linearity, noise and power consumption of the designs.