A 125–600-MHz IF 75-dB DR Partially Time-Interleaved Bandpass DSM Based on Passive $N$ -Path Filters
Abstract:
This work presents a sixth-order partially time-interleaved bandpass delta-sigma modulator (BP DSM) for direct intermediate-frequency (IF) digitization. There are three resonators, and each of them is built with a passive $N$ -path filter; while two open-loop operational transconductance amplifiers (OTAs) are inserted in between to realize the loop filter. The …