A New MASH ΣΔ Modulator Based on Resonation Strategy

A new multi-stage noise shaping ΣΔ modulator based on resonation strategy is proposed. This new structure achieves noise shaping with 2-order higher than a traditional one. Moreover, the resolution of this modulator is further increased by optimization of noise transfer function zeros. Using unity signal transfer function in this architecture reduces integrator output swing and makes it robust to nonlinearities of the amplifiers. Thus, the proposed modulator has higher resolution and lower power consumption than a conventional cascade modulator. Analytical calculations and behavioral simulation shows the effectiveness of the proposed architecture.