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This paper describes the design and implementation of a reconfigurable low power 180-nm CMOS cascade Σ-Δ modulator for multi-standard wireless communication. Both architectural and circuital reconfiguration is used to adapt its performance to multi-standard applications. Post layout simulation reveals that the prototype achieves 86.82/54.88/66.51d B peak signal-to-(noise+distortion) ratio within bandwidth...
A 12-bit 20 MS/s cost-efficient pipelined analog-digital converter is presented. A dedicated first stage is proposed to eliminate the need of front-end SHA. Passive capacitor error-averaging technique (PCEA) and opamp sharing scheme are employed to achieve high resolutions and low power and area. The offset and 1/f noise of Opamp is reduced by interchanging the polarity of input and output of Opamp...
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