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A 56 mW Continuous-Time Quadrature Cascaded Σ∆ Modulator With 77 dB DR in a Near Zero-IF 20 MHz Band

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4 Author(s)

A quadrature cascaded modulator with continuous-time loop filters is presented for a digital multi-stream FM radio receiver. The ADC achieves a dynamic range of 77 dB and 20 MHz bandwidth centered on an intermediate frequency of 10.5 MHz and is sampling at 340 MHz. The cascaded modulator comprises programmable analog second-order quadrature filters and a digital quadrature noise cancellation filter. The 0.5 chip in 90 nm CMOS consumes 56 mW from a 1.2 V supply.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:42 ,  Issue: 12 )