Two-stage synthesis filters for hybrid filter banks A/D converters

Hybrid filter banks (HFB) are the suitable candidates for implementing wide-band, high-frequency A/D parallel converters. This paper proposes a modified HFB configuration called two-stage structure to overcome the aliasing constraints. This structure yields much better performance in terms of aliasing, or equally a higher possible resolution than the original one. Moreover, this two-stage structure can provide the performance of the original one with approximately only half the number of coefficients in the FIR synthesis filters. Results will be shown in the realistic case when the analog analysis filters are easy-to-implement RLC (or RC) circuits.