Osc reset time

[Fraser, Colin J]

> -----Original Message-----
> From: Don Tillman [mailto:don at till.com]
> Sent: 17 December 1998 17:10
> To: Colin.Fraser at scottishpower.plc.uk
> Cc: synth-diy at mailhost.bpa.nl
> Subject: Re: Osc reset time
> 
> Isn't this the way that Exar function generator chip works?  No
> matter, I think this approach is new for electronic music work.

I always expect any workable idea to have been found before - the chances of
finding anything new are tiny :-))

> As Colin pointed out, a simultaneous triangle output would be an
> octave below.  It would also have glitches at the peaks.  Better to
> run a second current source, cap, and buffer for the triangle --
> effectively a second VCO, heavily syncd.

The glitches that are present must only last as long as the switch over time
(300ns) - I would expect these to be well above audio range, so they could
disappear with a bit of high frequency roll-off in the buffer amp.

Need to buy a better scope - mine is a cute but semi-useless student design
(liberated from a closing school) that struggles at 100kHz.

Colin f