III. Gm-C Filtering - Epublications - Université de Limoges

II.5 Literature Survey
Several papers dealing with active filtering, as well as passive LC filtering, are sorted
in tables in APPENDIX C. These tables summarize the performances found in the papers.
From these tables, some statistics can also be drawn.
Figure 91 depicts the part of CMOS and BiCMOS based filters in the literature. As it
may be seen, more than 90% of them are designed in CMOS.
Figure 91. CMOS vs BiCMOS filters
Figure 92 shows which CMOS technology node is used to design the filter. 0.35µm
and 0.18µm nodes are the most used. It is worth noticing that even for the analog design of an
RF filter, the technological trend goes towards more advanced nodes like 90nm CMOS and
even 65nm CMOS as it will be described later on.
Figure 92. CMOS filter technology node
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