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40 MHz IF 1 MHz Bandwidth Two-Path Bandpass ΣΔ Modulator With 72 dB DR Consuming 16 mW

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5 Author(s)
Galdi, I. ; Dept. of Electron., Univ. of Pavia, Pavia ; Bonizzoni, E. ; Malcovati, P. ; Manganaro, G.
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A bandpass modulator with two time-interleaved second-order modulators and cross-coupled paths is described. Split zeros around the 40 MHz IF provide a signal band of 1 MHz with 72 DR and 65.1 dB peak SNR. The circuit, integrated in a 0.18 CMOS technology, uses a 60 MHz clock per channel. Experimental results show that the in-band region is not affected by tones caused by mismatches and that a two-tones input causes an IMD signal of 68 . The power consumption is 16 mW with 1.8 V supply.

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Solid-State Circuits, IEEE Journal of  (Volume:43 ,  Issue: 7 )