[sdiy] Opamp with disable - phase detection

[Veronica Merryfield]

THis link shows an intersil op-amp  with a disable pin being used to  
provide a voltage output proportional to phase. Not sure how fast the  
disable is - the full article talks about video multiplexing and this,  
the phase detection, being a low speed application but that might be  
fast enough for audio use. Someone might have a use for this hence  
passing it on.


http://www.edn.com/contents/images/6553627f1.pdf