[sdiy] "Timer Controlled VCO" (TCVCO) ?

[Michael Zacherl]

Hi, 
recently I stumbled upon this in an interview [1] and wanted to find out how this would be implemented in detail.
But apparently it's a term Stefan Schmidt just coined back then? Searching the Net isn't very helpful, alas.
It's a DCO variant, he stated … but what? 
The term itself suggests some 'dualism' (timer controlled - voltage controlled … ),
so it's probably not too precisely formulated anyway?

Michael.

[1] http://www.noiz.gr/index.php?topic=197390.0