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A 69-mW 10-bit 80-MSample/s Pipelined CMOS ADC

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5 Author(s)

A 10-bit 80-MS/s analog-to-digital converter (ADC) with an area- and power-efficient architecture is described. By sharing an amplifier between two successive pipeline stages, a 10-bit pipeline is realized using just four amplifiers with a separate sample-and-hold block. The proposed feedback signal polarity inverting (FSPI) technique addresses the drawback of the conventional amplifier sharing technique. A wide-swing wide-bandwidth telescopic amplifier and an early comparison technique with a constant delay circuit have been developed to further reduce power consumption. The ADC is implemented in a 0.18-μm dual-gate-oxidation CMOS process technology, achieves 72.8-dBc spurious free dynamic range, 57.92-dBc signal-to-noise ratio, 9.29 effective number of bits (ENOB) for a 99-MHz input at full sampling rate, and consumes 69 mW from a 3-V supply. The ADC occupies 1.85 mm2.

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Solid-State Circuits, IEEE Journal of  (Volume:38 ,  Issue: 12 )