delta-sigma modulator

zimubeyond

【文件名】:06516@52RD_需打印.pdf
【格　式】:pdf
【大　小】:675K
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Abstract—Multi-bit sigma-delta modulators are widely used in
analog-to-digital conversion especially in the modern deep-submicron
CMOS process. As the quantizer resolution of 

modulators increases, the SNR performance improves. However,
the feedback DAC has to maintain high linearity. The general
practice to achieve that is to use dynamic element matching
(DEM). The methodology proposed in this paper will greatly
reduce the complexity or even avoid usage of DEM for multi-bit

modulators. The proposed methodology— truncation error
shaping and cancellation—reduces the feedback DAC levels for
multi-bit quantizers. A prototype was designed in a standard
CMOS 90-nm process to demonstrate the proposed methodologies.
It achieved targeted performance without DEM at low power
consumption with small silicon area.

MemsG

<P>ADC有SAR flash pipeline Sigma-Delta  etc.</P><P>Sigma-Delta ADC 又有 Single loop   Cascaded  etc. / 1 bit . Multibit</P><P>你这只是很少的一部分，帅哥，还要3RD？</P>