Indeed, analog circuits are well researched topic. However, I think it's important to understand that the transistor CPU is a fairly new topic. In fact, the whole of computer science is a relatively new topic.

As for research there's plenty. I linked slides from an undergraduate course because you wrote that your background leaned more towards computer science. Finding research in this topic is as easy as doing a search through IEEE.

http://asyncsymposium.org/async/Welcome.html http://www.async.caltech.edu/publications.html