Specific fields of research

If ur interested to work on any of the following fields, plz reply indicating the field of interest:

Analog:

1) Low power , low voltage opamp design
2) low noise amplifiers (chopper stabilized)
3)subthreshold analog circuits (current mirrors,amplifiers)
4)low voltage on-chip DC-DC converters

Mixed-Signal:

1) Low power High Speed ADC architectures
2) Low noise, low power PLL

Energy efficient digital circuits

- body-bias techniques
- adaptive bias and frequency scaling 

RF:
Linearization of power amplifiers
low power transceivers (Sub-threshold)
Current mode logic design

these topics are just to give an idea of the fields in which we can work. If u find other specific fields then plz share it here..i'll consolidate it finally after getting inputs from everyone..

I have attached the ISSCS 2011 conference flyer..look into it for further details.

http://isscc.org/doc/2011/ISSCC2011_CallForPapers.pdf