[sdiy] Analysis of frequency variation in analogue synths

[Ian Fritz]

At 01:49 AM 5/3/2007, Magnus Danielson wrote:
>  If you don't have a sine/cosine source, but only a sine source, then
>don't dispare, the polyphase filter setup is easy enought to build and that
>will do the phase-separation for you.

But if you only look at a single frequency, then you can make a very simple 
phase splitter with a single transistor.

   Ian