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A 1.1 mW 87 dB dynamic range 3rd order ΔΣ modulator is implemented in 0.18 μm CMOS technology for the audio applications. By adopting a feed-forward multi-bit topology, the signal swing at the output of the first integrator can be suppressed and only one simple current mirror single-stage OTA with 34 dB DC gain is used in the first integrator. The prototype modulator achieves 87 dB DR and 83.8 dB...
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