
Design of SC Delta-Sigma Modulators for Multistandard RF Receivers
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8.3 System-Level DS Modulator Design
Power and area are the two biggest concerns in relation to an integrated multi-
standard RF receiver, so they must be taken into account in the system-level design
of the ∆Σ modulators.
As Chapter 5 showed, there are many possible approaches to design ∆Σ modula-
tors, and each has its share of merits and demerits. We can fi nd in Table 5.4 that
when it comes to a low-power design, there are three best candidates: the 1-bit/
multibit multistage (all stages use 1-bit quantizers except for the last one, which uses
a multibit quantizer), the 1-b ...