Analysis and Design of Multiple-Bit High-Order [sigma-delta] Modulator
نویسندگان
چکیده
|The high-order modulator is an appropriate approach for high-bandwidth, high-resolution A/D conversion. However, non-ideal e ects such as the nite opamp gain and the capacitor mismatch have great impacts on its performance at a low oversampling ratio. To achieve greater performance under the inevitable non-ideal e ects, we explore several multiple-bit schemes, based on our CIQE high-order architecture, to remove the non-ideal deterioration. Design rules of these multiple-bit schemes are developed and veri ed by extensive simulations.
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