ADPLL for data recovery, or mm wave applications...
CMOS Power Amplifiers with Digital Approach...
CMOS DC-DC Converters..
SDR Circuit Implementation..
It seems that the topics you mentioned is for digital implementation/applications? I want to find RFIC design or Microwave technique.
They are not "Digital", but they rely on digital concepts to control blocks and their functionalities. The implementation and all the challanges are on the Analog domain.
Try to search the first 2 on Google and take a closer look.
If you want "pure" analog maybe in the area of Power Amplifiers would be better.. Open ieee explorer, and search for the newest articles on the subject.
60GHz CMOS design it's a hot topic in RFIC/uWave design.